{"id":6806,"date":"2018-11-07T23:28:00","date_gmt":"2018-11-07T21:28:00","guid":{"rendered":"http:\/\/viewonphysics.gr\/?p=6806"},"modified":"2018-11-07T23:35:12","modified_gmt":"2018-11-07T21:35:12","slug":"%ce%b7-%cf%86%cf%85%cf%83%ce%b9%ce%ba%ce%ae-%cf%84%ce%b7%cf%82-%cf%80%ce%b5%cf%81%ce%b9%cf%83%cf%84%cf%81%ce%b5%cf%86%cf%8c%ce%bc%ce%b5%ce%bd%ce%b7%cf%82-%cf%86%ce%b9%ce%ac%ce%bb%ce%b7%cf%82","status":"publish","type":"post","link":"https:\/\/viewonphysics.gr\/?p=6806","title":{"rendered":"\u0397 \u03a6\u03c5\u03c3\u03b9\u03ba\u03ae \u03c4\u03b7\u03c2 \u03a0\u03b5\u03c1\u03b9\u03c3\u03c4\u03c1\u03b5\u03c6\u03cc\u03bc\u03b5\u03bd\u03b7\u03c2 \u03a6\u03b9\u03ac\u03bb\u03b7\u03c2"},"content":{"rendered":"<p>\u03a3\u03b5 \u03c0\u03c1\u03bf\u03b7\u03b3\u03bf\u03cd\u03bc\u03b5\u03bd\u03b7 \u03b4\u03b7\u03bc\u03bf\u03c3\u03af\u03b5\u03c5\u03c3\u03ae \u03bc\u03b1\u03c2 \u03bc\u03b5 \u03c4\u03af\u03c4\u03bb\u03bf <a href=\"https:\/\/wp.me\/p4sIra-1Kh\" target=\"_blank\" rel=\"noopener\">\u0397 \u03a6\u03c5\u03c3\u03b9\u03ba\u03ae \u03c0\u03af\u03c3\u03c9 \u03b1\u03c0\u03cc \u03c4\u03bf \u03c0\u03ad\u03c4\u03b1\u03b3\u03bc\u03b1 \u03c4\u03b7\u03c2 \u03bc\u03c0\u03bf\u03c4\u03af\u03bb\u03b9\u03b1\u03c2<\/a> \u03c0\u03b1\u03c1\u03bf\u03c5\u03c3\u03b9\u03ac\u03c3\u03b1\u03bc\u03b5 \u03bc\u03af\u03b1 \u03b5\u03bd\u03b4\u03b9\u03b1\u03c6\u03ad\u03c1\u03bf\u03c5\u03c3\u03b1 \u03c0\u03c1\u03bf\u03c3\u03ad\u03b3\u03b3\u03b9\u03c3\u03b7 \u03c4\u03b7\u03c2 \u03b4\u03b7\u03bc\u03bf\u03c6\u03b9\u03bb\u03bf\u03cd\u03c2 \u03c3\u03c5\u03bd\u03ae\u03b8\u03b5\u03b9\u03b1\u03c2 \u03c4\u03c9\u03bd \u03bc\u03b1\u03b8\u03b7\u03c4\u03ce\u03bd \u03bd\u03b1 \u03c0\u03b5\u03c4\u03bf\u03cd\u03bd \u03c4\u03b9\u03c2 \u03c0\u03bb\u03b1\u03c3\u03c4\u03b9\u03ba\u03ad\u03c2 \u03c6\u03b9\u03ac\u03bb\u03b5\u03c2 \u03c4\u03bf\u03c5 \u03bd\u03b5\u03c1\u03bf\u03cd \u03bc\u03b5 \u03c3\u03ba\u03bf\u03c0\u03cc \u03b1\u03c5\u03c4\u03ad\u03c2 \u03bd\u03b1 \u03c0\u03c1\u03bf\u03c3\u03b3\u03b5\u03b9\u03c9\u03b8\u03bf\u03cd\u03bd \u03ba\u03ac\u03b8\u03b5\u03c4\u03b1 \u03c3\u03c4\u03b7\u03bd \u03b5\u03c0\u03b9\u03c6\u03ac\u03bd\u03b5\u03b9\u03b1 \u03c4\u03bf\u03c5 \u03b8\u03c1\u03b1\u03bd\u03af\u03bf\u03c5 \u03c4\u03bf\u03c5\u03c2. \u03a4\u03bf \u03c0\u03b1\u03c1\u03b1\u03ba\u03ac\u03c4\u03c9 \u03ac\u03c1\u03b8\u03c1\u03bf \u03b1\u03c0\u03cc \u03c4\u03bf American Journal of Physics \u03c0\u03b1\u03c1\u03bf\u03c5\u03c3\u03b9\u03ac\u03b6\u03b5\u03b9 \u03bc\u03af\u03b1 \u03c0\u03b9\u03bf \u03b5\u03bc\u03c0\u03b5\u03c1\u03b9\u03c3\u03c4\u03b1\u03c4\u03c9\u03bc\u03ad\u03bd\u03b7 \u03ba\u03b1\u03b9 \u03b1\u03bd\u03b1\u03bb\u03c5\u03c4\u03b9\u03ba\u03ae \u03c0\u03c1\u03bf\u03c3\u03ad\u03b3\u03b3\u03b9\u03c3\u03b7 \u03c4\u03bf\u03c5 \u03c6\u03b1\u03b9\u03bd\u03bf\u03bc\u03ad\u03bd\u03bf\u03c5, \u03bc\u03ad\u03c3\u03b1 \u03b1\u03c0\u03cc \u03c4\u03b7 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b7 \u03c0\u03b5\u03b9\u03c1\u03b1\u03bc\u03b1\u03c4\u03b9\u03ba\u03ce\u03bd \u03ba\u03b1\u03b9 \u03b8\u03b5\u03c9\u03c1\u03b7\u03c4\u03b9\u03ba\u03ce\u03bd \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd, \u03c0\u03bf\u03c5 \u03bb\u03ae\u03c6\u03b8\u03b7\u03ba\u03b1\u03bd \u03b1\u03c0\u03cc \u03bc\u03af\u03b1 \u03bf\u03bc\u03ac\u03b4\u03b1 \u03c0\u03c1\u03bf\u03c0\u03c4\u03c5\u03c7\u03b9\u03b1\u03ba\u03ce\u03bd \u03c6\u03bf\u03b9\u03c4\u03b7\u03c4\u03ce\u03bd \u03c4\u03bf\u03c5 \u03c0\u03b1\u03bd\u03b5\u03c0\u03b9\u03c3\u03c4\u03b7\u03bc\u03af\u03bf\u03c5 Twente \u03c4\u03b7\u03c2 \u039f\u03bb\u03bb\u03b1\u03bd\u03b4\u03af\u03b1\u03c2.<\/p>\n<ul>\n<li><strong><span class=\"contrib-author\">\u03a4\u03c9\u03bd P. J. Dekker<i class=\"pubContent-comma\">, <\/i><\/span><span class=\"contrib-author\"> L. A. G. Eek<i class=\"pubContent-comma\">, <\/i><\/span><span class=\"contrib-author\"> M. M. Flapper<i class=\"pubContent-comma\">, <\/i><\/span><span class=\"contrib-author\"> H. J. C. Horstink<i class=\"pubContent-comma\">, <\/i><\/span><span class=\"contrib-author\"> A. R. Meulenkamp<i class=\"pubContent-comma\">, and <\/i><\/span><span class=\"contrib-author\"> J. van der Meulen. <\/span>Faculty of Science and Technology, University of Twente,<span class=\"country\">The Netherlands<\/span><\/strong><\/li>\n<li><strong>\u0391\u03c0\u03cc \u03c4\u03bf American Journal of Physics<\/strong><\/li>\n<\/ul>\n<div style=\"width: 737px;\" class=\"wp-video\"><video class=\"wp-video-shortcode\" id=\"video-6806-1\" width=\"737\" height=\"415\" preload=\"metadata\" controls=\"controls\"><source type=\"video\/mp4\" src=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2018\/09\/Bottle.mp4?_=1\" \/><a href=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2018\/09\/Bottle.mp4\">https:\/\/viewonphysics.gr\/wp-content\/uploads\/2018\/09\/Bottle.mp4<\/a><\/video><\/div>\n<p>\u03a4\u03bf \u03b5\u03bd\u03b4\u03b9\u03b1\u03c6\u03ad\u03c1\u03bf\u03bd \u03c4\u03b7\u03c2 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b7\u03c2 \u03c3\u03c5\u03bd\u03af\u03c3\u03c4\u03b1\u03c4\u03b1\u03b9 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\u03bc\u03b5\u03b9\u03c9\u03bc\u03ad\u03bd\u03b7 \u03c0\u03b5\u03c1\u03b9\u03c3\u03c4\u03c1\u03bf\u03c6\u03ae \u03bf\u03c6\u03b5\u03af\u03bb\u03b5\u03c4\u03b1\u03b9 \u03c3\u03b5 \u03b1\u03cd\u03be\u03b7\u03c3\u03b7 \u03c4\u03b7\u03c2 \u03c1\u03bf\u03c0\u03ae\u03c2 \u03b1\u03b4\u03c1\u03ac\u03bd\u03b5\u03b9\u03b1\u03c2 \u03c0\u03bf\u03c5 \u03c0\u03c1\u03bf\u03ba\u03b1\u03bb\u03b5\u03af\u03c4\u03b1\u03b9 \u03b1\u03c0\u03cc \u03c4\u03b7\u03bd \u03b1\u03bd\u03b1\u03b4\u03b9\u03b1\u03bd\u03bf\u03bc\u03ae \u03c4\u03b7\u03c2 \u03bc\u03ac\u03b6\u03b1\u03c2 \u03c4\u03bf\u03c5 \u03bd\u03b5\u03c1\u03bf\u03cd \u03ba\u03b1\u03c4\u03ac \u03c4\u03b7 \u03b4\u03b9\u03ac\u03c1\u03ba\u03b5\u03b9\u03b1 \u03c4\u03b7\u03c2 \u03c0\u03c4\u03ae\u03c3\u03b7\u03c2 \u03ba\u03b1\u03c4\u03ac \u03bc\u03ae\u03ba\u03bf\u03c2 \u03c4\u03b7\u03c2 \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2. \u03a4\u03b1 \u03c0\u03b5\u03b9\u03c1\u03b1\u03bc\u03b1\u03c4\u03b9\u03ba\u03ac \u03ba\u03b1\u03b9 \u03b1\u03bd\u03b1\u03bb\u03c5\u03c4\u03b9\u03ba\u03ac \u03b1\u03c0\u03bf\u03c4\u03b5\u03bb\u03ad\u03c3\u03bc\u03b1\u03c4\u03b1 \u03c3\u03c5\u03b3\u03ba\u03c1\u03af\u03bd\u03bf\u03bd\u03c4\u03b1\u03b9 \u03c0\u03bf\u03c3\u03bf\u03c4\u03b9\u03ba\u03ac \u03ba\u03b1\u03b9 \u03b4\u03b5\u03af\u03c7\u03bd\u03bf\u03c5\u03bc\u03b5 \u03c0\u03ce\u03c2 \u03bc\u03c0\u03bf\u03c1\u03bf\u03cd\u03bc\u03b5 \u03bd\u03b1 \u03b2\u03b5\u03bb\u03c4\u03b9\u03c3\u03c4\u03bf\u03c0\u03bf\u03b9\u03ae\u03c3\u03bf\u03c5\u03bc\u03b5 \u03c4\u03b9\u03c2 \u03c0\u03b9\u03b8\u03b1\u03bd\u03cc\u03c4\u03b7\u03c4\u03b5\u03c2 \u03b5\u03c0\u03b9\u03c4\u03c5\u03c7\u03bf\u03cd\u03c2 \u03c0\u03c1\u03bf\u03c3\u03b3\u03b5\u03af\u03c9\u03c3\u03b7\u03c2.<br \/>\n<!--more--><\/p>\n<h2><span style=\"color: #0000ff;\"><strong>\u0395\u0399\u03a3\u0391\u0393\u03a9\u0393\u0397<\/strong><\/span><\/h2>\n<p>\u03a4\u03bf\u03bd \u039c\u03ac\u03b9\u03bf \u03c4\u03bf\u03c5 2016, \u03ad\u03bd\u03b1\u03c2 \u03bc\u03b1\u03b8\u03b7\u03c4\u03ae\u03c2 \u03bb\u03c5\u03ba\u03b5\u03af\u03bf\u03c5, \u03bf\u03bd\u03cc\u03bc\u03b1\u03c4\u03b9 Michael Senatore, \u03bc\u03c0\u03b1\u03af\u03bd\u03b5\u03b9 \u03c3\u03c4\u03b7\u03bd \u03c3\u03ba\u03b7\u03bd\u03ae \u03bc\u03b5 \u03ad\u03bd\u03b1 \u03bc\u03c0\u03bf\u03c5\u03ba\u03ac\u03bb\u03b9 \u03bc\u03b5\u03c1\u03b9\u03ba\u03ce\u03c2 \u03b3\u03b5\u03bc\u03ac\u03c4\u03bf \u03bc\u03b5 \u03bd\u03b5\u03c1\u03cc. \u03a3\u03c5\u03bc\u03bc\u03b5\u03c4\u03ad\u03c7\u03b5\u03b9 \u03c3\u03c4\u03bf \u03b5\u03c4\u03ae\u03c3\u03b9\u03bf talent show \u03c4\u03bf\u03c5 \u03c3\u03c7\u03bf\u03bb\u03b5\u03af\u03bf\u03c5 \u03ba\u03b1\u03b9 \u03b7 \u03b1\u03af\u03b8\u03bf\u03c5\u03c3\u03b1 \u03b5\u03ba\u03b4\u03b7\u03bb\u03ce\u03c3\u03b5\u03c9\u03bd \u03b5\u03af\u03bd\u03b1\u03b9 \u03b3\u03b5\u03bc\u03ac\u03c4\u03b7 (\u03b4\u03b5\u03c2 <a href=\"https:\/\/wp.me\/p4sIra-1Kh\" target=\"_blank\" rel=\"noopener\">\u03b5\u03b4\u03ce<\/a>). \u03a5\u03c0\u03ac\u03c1\u03c7\u03b5\u03b9 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\u03b6\u03b7\u03c4\u03c9\u03ba\u03c1\u03b1\u03c5\u03b3\u03ac\u03b6\u03bf\u03c5\u03bd. \u038c\u03bb\u03b1 \u03ba\u03b9\u03bd\u03b7\u03bc\u03b1\u03c4\u03bf\u03b3\u03c1\u03b1\u03c6\u03ae\u03b8\u03b7\u03ba\u03b1\u03bd \u03bc\u03b5 \u03bc\u03b9\u03b1 \u03ba\u03ac\u03bc\u03b5\u03c1\u03b1 smartphone. \u039c\u03ad\u03c3\u03b1 \u03c3\u03b5 \u03bb\u03af\u03b3\u03b5\u03c2 \u03b5\u03b2\u03b4\u03bf\u03bc\u03ac\u03b4\u03b5\u03c2, \u03b1\u03c5\u03c4\u03cc \u03c4\u03bf \u03ba\u03bb\u03b9\u03c0 \u03c4\u03c9\u03bd 30 \u03b4\u03b5\u03c5\u03c4\u03b5\u03c1\u03bf\u03bb\u03ad\u03c0\u03c4\u03c9\u03bd \u03ad\u03b3\u03b9\u03bd\u03b5 viral \u03c3\u03c4\u03bf \u03b4\u03b9\u03b1\u03b4\u03af\u03ba\u03c4\u03c5\u03bf \u03ba\u03b1\u03b9 \u03c4\u03b1 \u03c0\u03b1\u03b9\u03b4\u03b9\u03ac \u03c3\u03b5 \u03cc\u03bb\u03bf \u03c4\u03bf\u03bd \u03ba\u03cc\u03c3\u03bc\u03bf \u03ac\u03c1\u03c7\u03b9\u03c3\u03b1\u03bd \u03bd\u03b1 \u03c0\u03b1\u03af\u03c1\u03bd\u03bf\u03c5\u03bd \u03bc\u03ad\u03c1\u03bf\u03c2 \u03c3\u03c4\u03b7\u03bd &#8220;\u03c0\u03c1\u03cc\u03ba\u03bb\u03b7\u03c3\u03b7 \u03c4\u03bf\u03c5 \u03c0\u03b5\u03c1\u03b9\u03c3\u03c4\u03c1\u03b5\u03c6\u03cc\u03bc\u03b5\u03bd\u03bf\u03c5 \u03bc\u03c0\u03bf\u03c5\u03ba\u03b1\u03bb\u03b9\u03bf\u03cd \u03bc\u03b5 \u03bd\u03b5\u03c1\u03cc&#8221;, \u03cc\u03c0\u03c9\u03c2 \u03ad\u03b3\u03b9\u03bd\u03b5 \u03c4\u03b5\u03bb\u03b9\u03ba\u03ac \u03b3\u03bd\u03c9\u03c3\u03c4\u03cc. \u039f Michael Senatore \u03ba\u03b1\u03c4\u03ad\u03bb\u03b7\u03be\u03b5 \u03bd\u03b1 \u03c0\u03bf\u03c5\u03bb\u03ae\u03c3\u03b5\u03b9 \u03c4\u03bf \u03c6\u03b7\u03bc\u03b9\u03c3\u03bc\u03ad\u03bd\u03bf \u03bc\u03c0\u03bf\u03c5\u03ba\u03ac\u03bb\u03b9 \u03b3\u03b9\u03b1 $ 15 000 (\u03ae \u03c4\u03bf\u03c5\u03bb\u03ac\u03c7\u03b9\u03c3\u03c4\u03bf\u03bd \u03ad\u03bd\u03b1 \u03c5\u03c0\u03bf\u03b3\u03b5\u03b3\u03c1\u03b1\u03bc\u03bc\u03ad\u03bd\u03bf \u03b1\u03c0\u03cc \u03b1\u03c5\u03c4\u03cc\u03bd).<\/p>\n<p>\u0397 \u03c6\u03c5\u03c3\u03b9\u03ba\u03ae 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\u03b1\u03ad\u03c1\u03b1. \u038c\u03c4\u03b1\u03bd \u03b5\u03ba\u03c4\u03b5\u03bb\u03b5\u03c3\u03c4\u03b5\u03af \u03b7 \u03ba\u03af\u03bd\u03b7\u03c3\u03b7 \u03bc\u03b5 \u03b5\u03c0\u03b9\u03c4\u03c5\u03c7\u03af\u03b1, \u03b7 \u03c0\u03b5\u03c1\u03b9\u03c3\u03c4\u03c1\u03bf\u03c6\u03ae \u03c4\u03b5\u03bb\u03b5\u03b9\u03ce\u03bd\u03b5\u03b9 \u03bc\u03b5 \u03c3\u03c7\u03b5\u03b4\u03cc\u03bd \u03ba\u03b1\u03c4\u03b1\u03ba\u03cc\u03c1\u03c5\u03c6\u03b7 \u03ba\u03ac\u03b8\u03bf\u03b4\u03bf \u03c0\u03bf\u03c5 \u03b1\u03ba\u03bf\u03bb\u03bf\u03c5\u03b8\u03b5\u03af\u03c4\u03b1\u03b9 \u03b1\u03c0\u03cc \u03bf\u03bc\u03b1\u03bb\u03ae \u03c0\u03c1\u03bf\u03c3\u03b3\u03b5\u03af\u03c9\u03c3\u03b7.<\/p>\n<div id=\"attachment_6819\" style=\"width: 452px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2018\/09\/Bottle-1b.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-6819\" class=\"wp-image-6819\" src=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2018\/09\/Bottle-1b-300x142.jpg\" alt=\"\" width=\"442\" height=\"209\" srcset=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2018\/09\/Bottle-1b-300x142.jpg 300w, https:\/\/viewonphysics.gr\/wp-content\/uploads\/2018\/09\/Bottle-1b.jpg 500w\" sizes=\"auto, (max-width: 442px) 100vw, 442px\" \/><\/a><p id=\"caption-attachment-6819\" class=\"wp-caption-text\">\u0395\u03b9\u03ba. 1. \u03a3\u03cd\u03bd\u03b8\u03b5\u03c4\u03b5\u03c2 \u03c6\u03c9\u03c4\u03bf\u03b3\u03c1\u03b1\u03c6\u03af\u03b5\u03c2 \u03b5\u03bd\u03cc\u03c2 \u03b9\u03c0\u03c4\u03ac\u03bc\u03b5\u03bd\u03bf\u03c5 (\u03b5\u03c0\u03ac\u03bd\u03c9) \u03bc\u03c0\u03bf\u03c5\u03ba\u03b1\u03bb\u03b9\u03bf\u03cd \u03bc\u03b5 \u03bd\u03b5\u03c1\u03cc \u03ba\u03b1\u03b9 \u03b5\u03bd\u03cc\u03c2 \u03b9\u03c0\u03c4\u03ac\u03bc\u03b5\u03bd\u03bf\u03c5 \u03bc\u03c0\u03bf\u03c5\u03ba\u03b1\u03bb\u03b9\u03bf\u03cd \u03c4\u03ad\u03bd\u03b9\u03c2 (\u03ba\u03ac\u03c4\u03c9). \u039a\u03b1\u03b9 \u03c3\u03c4\u03b9\u03c2 \u03b4\u03cd\u03bf \u03c0\u03b5\u03c1\u03b9\u03c0\u03c4\u03ce\u03c3\u03b5\u03b9\u03c2, \u03b7 \u03b1\u03bd\u03b1\u03ba\u03b1\u03c4\u03b1\u03bd\u03bf\u03bc\u03ae \u03c4\u03b7\u03c2 \u03bc\u03ac\u03b6\u03b1\u03c2 \u03bc\u03ad\u03c3\u03b1 \u03c3\u03c4\u03b7 \u03c6\u03b9\u03ac\u03bb\u03b7 \u03bf\u03b4\u03b7\u03b3\u03b5\u03af \u03c3\u03b5 \u03b1\u03cd\u03be\u03b7\u03c3\u03b7 \u03c4\u03b7\u03c2 \u03c1\u03bf\u03c0\u03ae\u03c2 \u03b1\u03b4\u03c1\u03ac\u03bd\u03b5\u03b9\u03b1\u03c2 &#8211; \u03b5\u03c0\u03b9\u03b2\u03c1\u03b1\u03b4\u03cd\u03bd\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c4\u03b7\u03bd \u03c4\u03b1\u03c7\u03cd\u03c4\u03b7\u03c4\u03b1 \u03c0\u03b5\u03c1\u03b9\u03c3\u03c4\u03c1\u03bf\u03c6\u03ae\u03c2 \u03c4\u03b7\u03c2 \u03ba\u03b1\u03b9 \u03b5\u03c0\u03b9\u03c4\u03c1\u03ad\u03c0\u03bf\u03bd\u03c4\u03b1\u03c2 \u03bc\u03b9\u03b1 \u03c3\u03c7\u03b5\u03b4\u03cc\u03bd \u03ba\u03ac\u03b8\u03b5\u03c4\u03b7 \u03ba\u03ac\u03b8\u03bf\u03b4\u03bf.<\/p><\/div>\n<p>\u03a3\u03b5 \u03b1\u03c5\u03c4\u03cc \u03c4\u03bf \u03ac\u03c1\u03b8\u03c1\u03bf, \u03c0\u03b1\u03c1\u03bf\u03c5\u03c3\u03b9\u03ac\u03b6\u03bf\u03c5\u03bc\u03b5 \u03c0\u03ce\u03c2 \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03bd\u03b1 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03b7\u03b8\u03b5\u03af \u03bc\u03af\u03b1 \u03c0\u03b5\u03c1\u03b9\u03c3\u03c4\u03c1\u03b5\u03c6\u03cc\u03bc\u03b5\u03bd\u03b7 \u03c6\u03b9\u03ac\u03bb\u03b7 \u03bd\u03b5\u03c1\u03bf\u03cd \u03c3\u03c4\u03b7\u03bd \u03c4\u03ac\u03be\u03b7. \u03a3\u03c4\u03bf \u039a\u03b5\u03c6. \u0399\u0399, \u03b4\u03b5\u03af\u03c7\u03bd\u03bf\u03c5\u03bc\u03b5 \u03c0\u03ce\u03c2 \u03b7 \u03c0\u03b5\u03c1\u03af\u03c0\u03bb\u03bf\u03ba\u03b7 \u03b4\u03c5\u03bd\u03b1\u03bc\u03b9\u03ba\u03ae \u03c4\u03b7\u03c2 \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2 \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03bd\u03b1 \u03b1\u03c0\u03b5\u03b9\u03ba\u03bf\u03bd\u03b9\u03c3\u03c4\u03b5\u03af \u03c3\u03b5 \u03c0\u03b5\u03b9\u03c1\u03ac\u03bc\u03b1\u03c4\u03b1 \u03ba\u03b1\u03b9 \u03c0\u03ce\u03c2 \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03bd\u03b1 \u03b1\u03bd\u03b1\u03bb\u03c5\u03b8\u03b5\u03af \u03b4\u03b9\u03b1\u03c7\u03c9\u03c1\u03af\u03b6\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c4\u03b7\u03bd \u03ba\u03af\u03bd\u03b7\u03c3\u03b7 \u03c3\u03b5 \u03bc\u03b5\u03c4\u03ac\u03b8\u03b5\u03c3\u03b7 \u03c4\u03bf\u03c5 \u03ba\u03ad\u03bd\u03c4\u03c1\u03bf\u03c5 \u03bc\u03ac\u03b6\u03b1\u03c2 \u03ba\u03b1\u03b9 \u03c3\u03b5 \u03c0\u03b5\u03c1\u03b9\u03c3\u03c4\u03c1\u03bf\u03c6\u03ae \u03b3\u03cd\u03c1\u03c9 \u03b1\u03c0\u03cc \u03c4\u03bf \u03ba\u03ad\u03bd\u03c4\u03c1\u03bf \u03bc\u03ac\u03b6\u03b1\u03c2. \u0394\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03bf\u03c5 \u03cc\u03c4\u03b9 \u03b7 \u03c6\u03c5\u03c3\u03b9\u03ba\u03ae \u03c4\u03bf\u03c5 \u03bd\u03b5\u03c1\u03bf\u03cd \u03c0\u03bf\u03c5 \u03c7\u03c4\u03c5\u03c0\u03b9\u03ad\u03c4\u03b1\u03b9 \u03b5\u03af\u03bd\u03b1\u03b9 \u03b5\u03be\u03b1\u03b9\u03c1\u03b5\u03c4\u03b9\u03ba\u03ac \u03c0\u03bf\u03bb\u03cd\u03c0\u03bb\u03bf\u03ba\u03b7 \u03b1\u03c0\u03cc \u03bc\u03cc\u03bd\u03b7 \u03c4\u03b7\u03c2, \u03c0\u03b1\u03c1\u03bf\u03c5\u03c3\u03b9\u03ac\u03b6\u03bf\u03c5\u03bc\u03b5 \u03bc\u03b9\u03b1 \u03b5\u03bd\u03b1\u03bb\u03bb\u03b1\u03ba\u03c4\u03b9\u03ba\u03ae \u03bb\u03cd\u03c3\u03b7 \u03c0\u03bf\u03c5 \u03b5\u03af\u03bd\u03b1\u03b9 \u03c0\u03b9\u03bf \u03ba\u03b1\u03c4\u03ac\u03bb\u03bb\u03b7\u03bb\u03b7 \u03b3\u03b9\u03b1 \u03b1\u03bd\u03ac\u03bb\u03c5\u03c3\u03b7: \u03a4\u03b7\u03bd &#8220;\u03c0\u03b5\u03c1\u03b9\u03c3\u03c4\u03c1\u03b5\u03c6\u03cc\u03bc\u03b5\u03bd\u03b7 \u03bc\u03c0\u03bf\u03c4\u03af\u03bb\u03b9\u03b1 \u03bc\u03b5 \u03bc\u03c0\u03ac\u03bb\u03b5\u03c2 \u03c4\u03bf\u03c5 \u03c4\u03ad\u03bd\u03b9\u03c2&#8221;, \u03c0\u03bf\u03c5 \u03c0\u03b1\u03c1\u03bf\u03c5\u03c3\u03b9\u03ac\u03b6\u03b5\u03c4\u03b1\u03b9 \u03c3\u03c4\u03b7\u03bd \u0395\u03b9\u03ba 1 (b) (\u03ba\u03b1\u03b9 \u03c3\u03c4\u03bf \u03c3\u03c5\u03bc\u03c0\u03bb\u03b7\u03c1\u03c9\u03bc\u03b1\u03c4\u03b9\u03ba\u03cc \u03c5\u03bb\u03b9\u03ba\u03cc \u03c4\u03bf\u03c5 \u03b2\u03af\u03bd\u03c4\u03b5\u03bf). \u03a3\u03b5 \u03b1\u03c5\u03c4\u03cc \u03c4\u03bf \u03c3\u03cd\u03c3\u03c4\u03b7\u03bc\u03b1, \u03c4\u03bf \u03bd\u03b5\u03c1\u03cc \u03b1\u03bd\u03c4\u03b9\u03ba\u03b1\u03b8\u03af\u03c3\u03c4\u03b1\u03c4\u03b1\u03b9 \u03b1\u03c0\u03cc \u03b4\u03cd\u03bf \u03bc\u03c0\u03ac\u03bb\u03b5\u03c2 \u03c4\u03bf\u03c5 \u03c4\u03ad\u03bd\u03b9\u03c2 &#8211; \u03c0\u03c1\u03ac\u03b3\u03bc\u03b1\u03c4\u03b9, \u03b7 \u03b5\u03c0\u03b9\u03c4\u03c5\u03c7\u03b7\u03bc\u03ad\u03bd\u03b7 \u03b1\u03c5\u03c4\u03ae \u03c6\u03b9\u03ac\u03bb\u03b7 \u03b4\u03b5\u03af\u03c7\u03bd\u03b5\u03b9 \u03c3\u03b1\u03c6\u03ce\u03c2 \u03cc\u03c4\u03b9 \u03b7 \u03b1\u03bd\u03b1\u03ba\u03b1\u03c4\u03b1\u03bd\u03bf\u03bc\u03ae \u03c4\u03b7\u03c2 \u03bc\u03ac\u03b6\u03b1\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03c4\u03bf \u03c6\u03c5\u03c3\u03b9\u03ba\u03cc \u03c3\u03c5\u03c3\u03c4\u03b1\u03c4\u03b9\u03ba\u03cc \u03c0\u03af\u03c3\u03c9 \u03b1\u03c0\u03cc \u03c4\u03b7\u03bd \u03c0\u03b5\u03c1\u03b9\u03c3\u03c4\u03c1\u03bf\u03c6\u03ae. \u03a3\u03c4\u03b7 \u03c3\u03c5\u03bd\u03ad\u03c7\u03b5\u03b9\u03b1, \u03c3\u03c4\u03bf \u039a\u03b5\u03c6. III, \u03b4\u03b5\u03af\u03c7\u03bd\u03bf\u03c5\u03bc\u03b5 \u03c0\u03ce\u03c2 \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03bd\u03b1 \u03c0\u03b5\u03c1\u03b9\u03b3\u03c1\u03b1\u03c6\u03b5\u03af \u03b7 \u03c0\u03b5\u03c1\u03b9\u03c3\u03c4\u03c1\u03bf\u03c6\u03ae \u03b1\u03c0\u03cc \u03ad\u03bd\u03b1 \u03b8\u03b5\u03c9\u03c1\u03b7\u03c4\u03b9\u03ba\u03cc \u03bc\u03bf\u03bd\u03c4\u03ad\u03bb\u03bf, \u03b5\u03c0\u03b9\u03c4\u03c1\u03ad\u03c0\u03bf\u03bd\u03c4\u03b1\u03c2 \u03b1\u03ba\u03cc\u03bc\u03b7 \u03ba\u03b1\u03b9 \u03c0\u03bf\u03c3\u03bf\u03c4\u03b9\u03ba\u03ae \u03c3\u03cd\u03b3\u03ba\u03c1\u03b9\u03c3\u03b7 \u03bc\u03b5 \u03c0\u03b5\u03b9\u03c1\u03ac\u03bc\u03b1\u03c4\u03b1.<\/p>\n<p>\u039c\u03b5 \u03b2\u03ac\u03c3\u03b7 \u03c4\u03b9\u03c2 \u03c0\u03b1\u03c1\u03b1\u03c4\u03b7\u03c1\u03ae\u03c3\u03b5\u03b9\u03c2 \u03ba\u03b1\u03b9 \u03c4\u03b7 \u03bc\u03bf\u03bd\u03c4\u03b5\u03bb\u03bf\u03c0\u03bf\u03af\u03b7\u03c3\u03b7, \u03ba\u03bb\u03b5\u03af\u03bd\u03bf\u03c5\u03bc\u03b5 \u03bc\u03b5 \u03c4\u03b7\u03bd \u03b1\u03bd\u03c4\u03b9\u03bc\u03b5\u03c4\u03ce\u03c0\u03b9\u03c3\u03b7 \u03b5\u03bd\u03cc\u03c2 \u03c3\u03b7\u03bc\u03b1\u03bd\u03c4\u03b9\u03ba\u03bf\u03cd \u03b5\u03c1\u03c9\u03c4\u03ae\u03bc\u03b1\u03c4\u03bf\u03c2 \u03c0\u03bf\u03c5 \u03c0\u03c1\u03bf\u03ba\u03cd\u03c0\u03c4\u03b5\u03b9 \u03cc\u03c4\u03b1\u03bd \u03b5\u03c0\u03b9\u03c7\u03b5\u03b9\u03c1\u03bf\u03cd\u03bc\u03b5 \u03bc\u03b9\u03b1 &#8220;\u03c0\u03c1\u03cc\u03ba\u03bb\u03b7\u03c3\u03b7 \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2 \u03bc\u03b5 \u03bd\u03b5\u03c1\u03cc&#8221; (\u039a\u03b5\u03c6\u03ac\u03bb\u03b1\u03b9\u03bf IV): \u0393\u03b9\u03b1\u03c4\u03af \u03c5\u03c0\u03ac\u03c1\u03c7\u03b5\u03b9 \u03bc\u03b9\u03b1 \u03b2\u03ad\u03bb\u03c4\u03b9\u03c3\u03c4\u03b7 \u03c0\u03bf\u03c3\u03cc\u03c4\u03b7\u03c4\u03b1 \u03bd\u03b5\u03c1\u03bf\u03cd \u03c3\u03c4\u03b7 \u03c6\u03b9\u03ac\u03bb\u03b7 \u03b3\u03b9\u03b1 \u03ba\u03b1\u03bb\u03cd\u03c4\u03b5\u03c1\u03b7 \u03c0\u03b5\u03c1\u03b9\u03c3\u03c4\u03c1\u03bf\u03c6\u03ae; \u0395\u03ba\u03b1\u03c4\u03bf\u03bc\u03bc\u03cd\u03c1\u03b9\u03b1 \u03b5\u03ba\u03c4\u03b5\u03bb\u03b5\u03c3\u03c4\u03ad\u03c2 \u03c4\u03bf\u03c5 \u03c0\u03b5\u03c4\u03ac\u03b3\u03bc\u03b1\u03c4\u03bf\u03c2 \u03c4\u03b7\u03c2 \u03bc\u03c0\u03bf\u03c4\u03af\u03bb\u03b9\u03b1\u03c2 \u03c6\u03b1\u03af\u03bd\u03b5\u03c4\u03b1\u03b9 \u03bd\u03b1 \u03b4\u03b9\u03b1\u03c6\u03c9\u03bd\u03bf\u03cd\u03bd \u03c3\u03c7\u03b5\u03c4\u03b9\u03ba\u03ac \u03bc\u03b5 \u03c4\u03b7\u03bd \u03b1\u03ba\u03c1\u03b9\u03b2\u03ae \u03c4\u03b9\u03bc\u03ae, \u03b1\u03bb\u03bb\u03ac \u03c3\u03c5\u03bc\u03c6\u03c9\u03bd\u03bf\u03cd\u03bd \u03cc\u03c4\u03b9 \u03c4\u03bf \u03b2\u03ad\u03bb\u03c4\u03b9\u03c3\u03c4\u03bf \u03ba\u03bb\u03ac\u03c3\u03bc\u03b1 \u03c0\u03bb\u03ae\u03c1\u03c9\u03c3\u03b7\u03c2 \u03c0\u03c1\u03ad\u03c0\u03b5\u03b9 \u03bd\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 \u03bc\u03b5\u03c4\u03b1\u03be\u03cd 1\/4 \u03ba\u03b1\u03b9 1\/3 \u03c4\u03bf\u03c5 \u03c3\u03c5\u03bd\u03bf\u03bb\u03b9\u03ba\u03bf\u03cd \u03cd\u03c8\u03bf\u03c5\u03c2 \u03c4\u03b7\u03c2 \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2. \u039c\u03c0\u03bf\u03c1\u03bf\u03cd\u03bc\u03b5 \u03bd\u03b1 \u03b5\u03be\u03b7\u03b3\u03ae\u03c3\u03bf\u03c5\u03bc\u03b5 \u03b1\u03c5\u03c4\u03ad\u03c2 \u03c4\u03b9\u03c2 \u03c4\u03b9\u03bc\u03ad\u03c2 \u03bc\u03b5 \u03b1\u03c1\u03c7\u03ad\u03c2 \u03c4\u03b7\u03c2 \u03bc\u03b7\u03c7\u03b1\u03bd\u03b9\u03ba\u03ae\u03c2;<\/p>\n<h2><span style=\"color: #3366ff;\"><strong>II. \u03a0\u0395\u0399\u03a1\u0391\u039c\u0391\u03a4\u0391<\/strong><\/span><\/h2>\n<p>\u039e\u03b5\u03ba\u03b9\u03bd\u03ac\u03bc\u03b5 \u03c0\u03b5\u03c1\u03b9\u03b3\u03c1\u03ac\u03c6\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c0\u03ce\u03c2 \u03b1\u03c0\u03b5\u03b9\u03ba\u03bf\u03bd\u03af\u03b6\u03bf\u03c5\u03bc\u03b5 \u03b4\u03c5\u03bd\u03b1\u03bc\u03b9\u03ba\u03ac \u03c4\u03b7\u03bd \u03c0\u03b5\u03c1\u03b9\u03c3\u03c4\u03c1\u03bf\u03c6\u03ae \u03c4\u03b7\u03c2 \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2 \u03ba\u03b1\u03b9 \u03c0\u03ce\u03c2 \u03b1\u03bd\u03b1\u03bb\u03cd\u03bf\u03c5\u03bc\u03b5 \u03c4\u03b7\u03bd \u03c0\u03c1\u03bf\u03ba\u03cd\u03c0\u03c4\u03bf\u03c5\u03c3\u03b1 \u03ba\u03af\u03bd\u03b7\u03c3\u03b7. \u03a4\u03bf \u03c0\u03b5\u03af\u03c1\u03b1\u03bc\u03b1 \u03ad\u03c7\u03b5\u03b9 \u03c3\u03c7\u03b5\u03b4\u03b9\u03b1\u03c3\u03c4\u03b5\u03af \u03bc\u03b5 \u03c4\u03b7\u03bd \u03ba\u03bb\u03b1\u03c3\u03c3\u03b9\u03ba\u03ae \u03c0\u03c1\u03bf\u03c3\u03ad\u03b3\u03b3\u03b9\u03c3\u03b7 \u03c4\u03b7\u03c2 \u03b4\u03c5\u03bd\u03b1\u03bc\u03b9\u03ba\u03ae\u03c2 \u03c4\u03c9\u03bd \u03b5\u03ba\u03c4\u03b5\u03c4\u03b1\u03bc\u03ad\u03bd\u03c9\u03bd \u03c3\u03c9\u03bc\u03ac\u03c4\u03c9\u03bd: \u0397 \u03ba\u03af\u03bd\u03b7\u03c3\u03b7 \u03b1\u03c0\u03bf\u03c3\u03c5\u03bd\u03c4\u03af\u03b8\u03b5\u03c4\u03b1\u03b9 \u03c3\u03b5 <span style=\"font-size: 12pt;\"><em>\u03bc\u03b5\u03c4\u03ac\u03b8\u03b5\u03c3\u03b7<\/em><\/span> \u03c4\u03bf\u03c5 \u03ba\u03ad\u03bd\u03c4\u03c1\u03bf\u03c5 \u03c4\u03b7\u03c2 \u03bc\u03ac\u03b6\u03b1\u03c2 \u03ba\u03b1\u03b9 <em><span style=\"font-size: 12pt;\">\u03c0\u03b5\u03c1\u03b9\u03c3\u03c4\u03c1\u03bf\u03c6\u03ae<\/span><\/em> \u03b3\u03cd\u03c1\u03c9 \u03b1\u03c0\u03cc \u03c4\u03bf \u03ba\u03ad\u03bd\u03c4\u03c1\u03bf \u03c4\u03b7\u03c2 \u03bc\u03ac\u03b6\u03b1\u03c2. \u0391\u03c5\u03c4\u03ae \u03b7 \u03b1\u03c0\u03bf\u03c3\u03cd\u03bd\u03b8\u03b5\u03c3\u03b7 \u03b5\u03af\u03bd\u03b1\u03b9 \u03c6\u03c5\u03c3\u03b9\u03ba\u03ae, \u03ba\u03b1\u03b8\u03ce\u03c2 \u03b7 \u03bc\u03cc\u03bd\u03b7 \u03b5\u03be\u03c9\u03c4\u03b5\u03c1\u03b9\u03ba\u03ae \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7 \u03b5\u03af\u03bd\u03b1\u03b9 \u03b7 \u03b2\u03b1\u03c1\u03cd\u03c4\u03b7\u03c4\u03b1, \u03b7 \u03bf\u03c0\u03bf\u03af\u03b1 \u03b4\u03b5\u03bd \u03b1\u03c3\u03ba\u03b5\u03af \u03c1\u03bf\u03c0\u03ae \u03b3\u03cd\u03c1\u03c9 \u03b1\u03c0\u03cc \u03c4\u03bf \u03ba\u03ad\u03bd\u03c4\u03c1\u03bf \u03c4\u03b7\u03c2 \u03bc\u03ac\u03b6\u03b1\u03c2. \u03a9\u03c2 \u03b5\u03ba \u03c4\u03bf\u03cd\u03c4\u03bf\u03c5, \u03c4\u03bf \u03c0\u03ad\u03c4\u03b1\u03b3\u03bc\u03b1 \u03c4\u03b7\u03c2 \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2 \u03bd\u03b5\u03c1\u03bf\u03cd \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03b5\u03cd\u03b5\u03b9 \u03c9\u03c2 \u03c0\u03c1\u03c9\u03c4\u03b1\u03c1\u03c7\u03b9\u03ba\u03cc \u03c0\u03b1\u03c1\u03ac\u03b4\u03b5\u03b9\u03b3\u03bc\u03b1 \u03b4\u03b9\u03b1\u03c4\u03ae\u03c1\u03b7\u03c3\u03b7\u03c2 \u03c4\u03b7\u03c2 \u03b3\u03c9\u03bd\u03b9\u03b1\u03ba\u03ae\u03c2 \u03bf\u03c1\u03bc\u03ae\u03c2.<\/p>\n<p>\u0395\u03ba\u03c4\u03cc\u03c2 \u03b1\u03c0\u03cc \u03c4\u03b7 \u03c6\u03b9\u03ac\u03bb\u03b7 \u03bd\u03b5\u03c1\u03bf\u03cd \u03ba\u03b1\u03b9 \u03c4\u03b7 \u03c6\u03b9\u03ac\u03bb\u03b7 \u03c4\u03ad\u03bd\u03b9\u03c2 \u03c0\u03bf\u03c5 \u03c6\u03b1\u03af\u03bd\u03b5\u03c4\u03b1\u03b9 \u03c3\u03c4\u03b7\u03bd <a href=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2018\/09\/Bottle-1b.jpg\" target=\"_blank\" rel=\"noopener\">\u0395\u03b9\u03ba. 1<\/a>, \u03b8\u03b1 \u03b5\u03be\u03b5\u03c4\u03ac\u03c3\u03bf\u03c5\u03bc\u03b5 \u03b5\u03c0\u03af\u03c3\u03b7\u03c2 \u03bc\u03b9\u03b1 &#8220;\u03ac\u03ba\u03b1\u03bc\u03c0\u03c4\u03b7 \u03c6\u03b9\u03ac\u03bb\u03b7&#8221; \u03c0\u03bf\u03c5 \u03c0\u03b5\u03c1\u03b9\u03ad\u03c7\u03b5\u03b9 \u03bc\u03b9\u03b1 \u03b1\u03ba\u03b9\u03bd\u03b7\u03c4\u03bf\u03c0\u03bf\u03b9\u03b7\u03bc\u03ad\u03bd\u03b7 \u03bc\u03ac\u03b6\u03b1. \u0397 \u03ac\u03ba\u03b1\u03bc\u03c0\u03c4\u03b7 \u03c6\u03b9\u03ac\u03bb\u03b7 \u03b5\u03be\u03c5\u03c0\u03b7\u03c1\u03b5\u03c4\u03b5\u03af \u03b4\u03cd\u03bf \u03c3\u03ba\u03bf\u03c0\u03bf\u03cd\u03c2: \u03bd\u03b1 \u03b5\u03c0\u03b1\u03bb\u03b7\u03b8\u03b5\u03cd\u03c3\u03bf\u03c5\u03bc\u03b5 \u03cc\u03c4\u03b9 \u03b1\u03bd\u03b1\u03ba\u03c4\u03ac\u03bc\u03b5 \u03c4\u03b7 \u03c3\u03c5\u03bd\u03ae\u03b8\u03b7 \u03c0\u03b5\u03c1\u03b9\u03c3\u03c4\u03c1\u03bf\u03c6\u03ae \u03c4\u03bf\u03c5 \u03ac\u03ba\u03b1\u03bc\u03c0\u03c4\u03bf\u03c5 \u03c3\u03ce\u03bc\u03b1\u03c4\u03bf\u03c2 \u03ba\u03b1\u03b9 \u03bd\u03b1 \u03c4\u03bf\u03bd\u03af\u03c3\u03bf\u03c5\u03bc\u03b5 \u03c4\u03b7 \u03c3\u03b7\u03bc\u03b1\u03c3\u03af\u03b1 \u03c4\u03b7\u03c2 \u03ba\u03b9\u03bd\u03b7\u03c4\u03ae\u03c2 \u03bc\u03ac\u03b6\u03b1\u03c2 \u03b3\u03b9\u03b1 \u03bc\u03b9\u03b1 \u03b5\u03c0\u03b9\u03c4\u03c5\u03c7\u03b7\u03bc\u03ad\u03bd\u03b7 \u03b1\u03bd\u03b1\u03c3\u03c4\u03c1\u03bf\u03c6\u03ae \u03c4\u03b7\u03c2 \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2.<\/p>\n<h3><span style=\"color: #3366ff;\"><strong>\u0391. \u03a0\u03b5\u03b9\u03c1\u03b1\u03bc\u03b1\u03c4\u03b9\u03ba\u03ae \u03b5\u03b3\u03ba\u03b1\u03c4\u03ac\u03c3\u03c4\u03b1\u03c3\u03b7 \u03ba\u03b1\u03b9 \u03b1\u03bd\u03ac\u03bb\u03c5\u03c3\u03b7<\/strong><\/span><\/h3>\n<p>\u0397 \u03c0\u03b5\u03b9\u03c1\u03b1\u03bc\u03b1\u03c4\u03b9\u03ba\u03ae \u03b4\u03b9\u03ac\u03c4\u03b1\u03be\u03b7 \u03c0\u03bf\u03c5 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03ae\u03b8\u03b7\u03ba\u03b5 \u03c3\u03b5 \u03b1\u03c5\u03c4\u03ae \u03c4\u03b7 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b7 \u03b1\u03c0\u03bf\u03c4\u03b5\u03bb\u03b5\u03af\u03c4\u03b1\u03b9 \u03b1\u03c0\u03cc \u03ad\u03bd\u03b1 \u03bc\u03b1\u03cd\u03c1\u03bf \u03c6\u03cc\u03bd\u03c4\u03bf, \u03bc\u03b9\u03b1 \u03bb\u03ac\u03bc\u03c0\u03b1 \u03c6\u03c9\u03c4\u03b9\u03c3\u03bc\u03bf\u03cd \u03ba\u03b1\u03b9 \u03bc\u03b9\u03b1 \u03c8\u03b7\u03c6\u03b9\u03b1\u03ba\u03ae \u03c6\u03c9\u03c4\u03bf\u03b3\u03c1\u03b1\u03c6\u03b9\u03ba\u03ae \u03bc\u03b7\u03c7\u03b1\u03bd\u03ae a-6000. \u039a\u03ac\u03b8\u03b5 \u03c0\u03b5\u03b9\u03c1\u03b1\u03bc\u03b1\u03c4\u03b9\u03ba\u03ae \u03b5\u03ba\u03c4\u03ad\u03bb\u03b5\u03c3\u03b7 (\u03ae \u03c0\u03ad\u03c4\u03b1\u03b3\u03bc\u03b1 \u03c4\u03b7\u03c2 \u03bc\u03c0\u03bf\u03c4\u03af\u03bb\u03b9\u03b1\u03c2) \u03b4\u03b9\u03b1\u03c1\u03ba\u03b5\u03af \u03c0\u03b5\u03c1\u03af\u03c0\u03bf\u03c5 1 \u03b4\u03b5\u03c5\u03c4\u03b5\u03c1\u03cc\u03bb\u03b5\u03c0\u03c4\u03bf. \u0395\u03b4\u03ce, \u03ba\u03b1\u03c4\u03b1\u03b3\u03c1\u03ac\u03c8\u03b1\u03bc\u03b5 \u03c4\u03b9\u03c2 \u03c4\u03b1\u03b9\u03bd\u03af\u03b5\u03c2 \u03c3\u03c4\u03b1 50 \u03ba\u03b1\u03c1\u03ad \u03b1\u03bd\u03ac \u03b4\u03b5\u03c5\u03c4\u03b5\u03c1\u03cc\u03bb\u03b5\u03c0\u03c4\u03bf, \u03c7\u03c1\u03cc\u03bd\u03bf \u03bb\u03ae\u03c8\u03b7\u03c2 <span style=\"font-size: 12pt;\">1\/1600 s<\/span> \u03ba\u03b1\u03b9 \u03b1\u03bd\u03ac\u03bb\u03c5\u03c3\u03b7 2 megapixel. \u0397 \u03c3\u03cd\u03c3\u03c4\u03b1\u03c3\u03ae \u03bc\u03b1\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03bd\u03b1 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03b7\u03b8\u03bf\u03cd\u03bd \u03c4\u03bf\u03c5\u03bb\u03ac\u03c7\u03b9\u03c3\u03c4\u03bf\u03bd 20 \u03ba\u03b1\u03c1\u03ad \u03b1\u03bd\u03ac \u03b4\u03b5\u03c5\u03c4\u03b5\u03c1\u03cc\u03bb\u03b5\u03c0\u03c4\u03bf \u03b3\u03b9\u03b1 \u03bd\u03b1 \u03c3\u03c5\u03b3\u03ba\u03b5\u03bd\u03c4\u03c1\u03c9\u03b8\u03bf\u03cd\u03bd \u03b1\u03c1\u03ba\u03b5\u03c4\u03ac \u03c3\u03b7\u03bc\u03b5\u03af\u03b1 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd, \u03bc\u03b5 \u03bc\u03ad\u03b3\u03b9\u03c3\u03c4\u03bf \u03c7\u03c1\u03cc\u03bd\u03bf \u03bb\u03ae\u03c8\u03b7\u03c2 <span style=\"font-size: 12pt;\">1\/200 s<\/span> \u03b3\u03b9\u03b1 \u03bd\u03b1 \u03b1\u03c0\u03bf\u03c6\u03cd\u03b3\u03bf\u03c5\u03bc\u03b5 \u03b8\u03cc\u03bb\u03c9\u03c3\u03b7 \u03c3\u03c4\u03b7 \u03bc\u03b5\u03c4\u03b1\u03ba\u03b9\u03bd\u03bf\u03cd\u03bc\u03b5\u03bd\u03b7 \u03c6\u03b9\u03ac\u03bb\u03b7 \u03ba\u03b1\u03b9 \u03b5\u03bb\u03ac\u03c7\u03b9\u03c3\u03c4\u03b7 \u03b1\u03bd\u03ac\u03bb\u03c5\u03c3\u03b7 1 megapixel (\u03c3\u03c4\u03b7\u03bd \u03b5\u03c0\u03bf\u03c7\u03ae \u03bc\u03b1\u03c2 \u03bf\u03b9 \u03c0\u03b5\u03c1\u03b9\u03c3\u03c3\u03cc\u03c4\u03b5\u03c1\u03b5\u03c2 \u03ba\u03ac\u03bc\u03b5\u03c1\u03b5\u03c2 smartphone \u03c0\u03bb\u03b7\u03c1\u03bf\u03cd\u03bd \u03b1\u03c5\u03c4\u03ad\u03c2 \u03c4\u03b9\u03c2 \u03b1\u03c0\u03b1\u03b9\u03c4\u03ae\u03c3\u03b5\u03b9\u03c2). \u03a3\u03c5\u03bd\u03ae\u03b8\u03c9\u03c2 \u03c0\u03c1\u03b1\u03b3\u03bc\u03b1\u03c4\u03bf\u03c0\u03bf\u03b9\u03bf\u03cd\u03bc\u03b5 10 \u03b5\u03c0\u03b9\u03c4\u03c5\u03c7\u03b5\u03af\u03c2 \u03b1\u03bd\u03b1\u03c4\u03c1\u03bf\u03c0\u03ad\u03c2 \u03b1\u03bd\u03ac \u03c4\u03cd\u03c0\u03bf \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2 \u03bc\u03b5 \u03c4\u03b1 \u03af\u03b4\u03b9\u03b1 \u03b3\u03b5\u03bc\u03af\u03c3\u03bc\u03b1\u03c4\u03b1 \u03ba\u03b1\u03b9 \u03b5\u03c0\u03b9\u03bb\u03ad\u03b3\u03bf\u03c5\u03bc\u03b5 \u03c4\u03b9\u03c2 \u03c0\u03b9\u03bf \u03ba\u03b1\u03b8\u03b1\u03c1\u03ad\u03c2 \u03c0\u03c1\u03bf\u03c3\u03b3\u03b5\u03b9\u03ce\u03c3\u03b5\u03b9\u03c2 \u03b1\u03bd\u03ac\u03bc\u03b5\u03c3\u03ac \u03c4\u03bf\u03c5\u03c2 \u03b3\u03b9\u03b1 \u03b1\u03bd\u03ac\u03bb\u03c5\u03c3\u03b7.<\/p>\n<p>\u0397 \u03c0\u03b5\u03c1\u03b9\u03c3\u03c4\u03c1\u03bf\u03c6\u03b9\u03ba\u03ae \u03ba\u03af\u03bd\u03b7\u03c3\u03b7 \u03c0\u03c1\u03bf\u03c3\u03b4\u03b9\u03bf\u03c1\u03af\u03b6\u03b5\u03c4\u03b1\u03b9 \u03c0\u03bf\u03c3\u03bf\u03c4\u03b9\u03ba\u03ac \u03b1\u03c0\u03cc \u03c4\u03b7 \u03b3\u03c9\u03bd\u03b9\u03b1\u03ba\u03ae \u03c4\u03b1\u03c7\u03cd\u03c4\u03b7\u03c4\u03b1 <span style=\"font-size: 12pt;\">\u03c9 = d\u03b8 \/ dt.<\/span> \u0391\u03c5\u03c4\u03ae \u03b7 \u03c0\u03bf\u03c3\u03cc\u03c4\u03b7\u03c4\u03b1 \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03bd\u03b1 \u03bc\u03b5\u03c4\u03c1\u03b7\u03b8\u03b5\u03af \u03b5\u03bd\u03c4\u03bf\u03c0\u03af\u03b6\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c4\u03bf \u03c0\u03ac\u03bd\u03c9 \u03ba\u03b1\u03b9 \u03c4\u03bf \u03ba\u03ac\u03c4\u03c9 \u03bc\u03ad\u03c1\u03bf\u03c2 \u03c4\u03b7\u03c2 \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2 \u03c3\u03c4\u03b1 \u03b2\u03af\u03bd\u03c4\u03b5\u03bf. \u0388\u03bd\u03b1 \u03ac\u03bb\u03bb\u03bf \u03b2\u03b1\u03c3\u03b9\u03ba\u03cc \u03c3\u03c4\u03bf\u03b9\u03c7\u03b5\u03af\u03bf \u03c4\u03b7\u03c2 \u03b1\u03bd\u03ac\u03bb\u03c5\u03c3\u03b7\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03bd\u03b1 \u03c0\u03c1\u03bf\u03c3\u03b4\u03b9\u03bf\u03c1\u03b9\u03c3\u03c4\u03b5\u03af \u03b7 \u03ba\u03af\u03bd\u03b7\u03c3\u03b7 \u03c4\u03bf\u03c5 \u03ba\u03ad\u03bd\u03c4\u03c1\u03bf\u03c5 \u03bc\u03ac\u03b6\u03b1\u03c2 \u03c4\u03bf\u03c5 \u03c3\u03c5\u03bd\u03bf\u03bb\u03b9\u03ba\u03bf\u03cd \u03c3\u03c5\u03c3\u03c4\u03ae\u03bc\u03b1\u03c4\u03bf\u03c2. \u0393\u03b9\u03b1 \u03c4\u03b7\u03bd \u03ac\u03ba\u03b1\u03bc\u03c0\u03c4\u03b7 \u03c6\u03b9\u03ac\u03bb\u03b7, \u03cc\u03bb\u03b5\u03c2 \u03c4\u03b9\u03c2 \u03c6\u03bf\u03c1\u03ad\u03c2, \u03c4\u03bf \u03ba\u03ad\u03bd\u03c4\u03c1\u03bf \u03c4\u03b7\u03c2 \u03bc\u03ac\u03b6\u03b1\u03c2 \u03c0\u03c1\u03bf\u03c6\u03b1\u03bd\u03ce\u03c2 \u03c0\u03b1\u03c1\u03b1\u03bc\u03ad\u03bd\u03b5\u03b9 \u03c3\u03b5 \u03c3\u03c4\u03b1\u03b8\u03b5\u03c1\u03ae \u03b8\u03ad\u03c3\u03b7 \u03ba\u03b1\u03c4\u03ac \u03bc\u03ae\u03ba\u03bf\u03c2 \u03c4\u03b7\u03c2 \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2. \u03a9\u03c3\u03c4\u03cc\u03c3\u03bf, \u03b5\u03af\u03bd\u03b1\u03b9 \u03bc\u03ac\u03bb\u03bb\u03bf\u03bd \u03b4\u03cd\u03c3\u03ba\u03bf\u03bb\u03bf \u03bd\u03b1 \u03c0\u03c1\u03bf\u03c3\u03b4\u03b9\u03bf\u03c1\u03b9\u03c3\u03c4\u03b5\u03af \u03bc\u03b5 \u03b1\u03ba\u03c1\u03af\u03b2\u03b5\u03b9\u03b1 \u03c4\u03bf \u03ba\u03ad\u03bd\u03c4\u03c1\u03bf \u03c4\u03b7\u03c2 \u03bc\u03ac\u03b6\u03b1\u03c2 \u03c4\u03bf\u03c5 \u03bd\u03b5\u03c1\u03bf\u03cd, \u03cc\u03c4\u03b1\u03bd \u03b1\u03c5\u03c4\u03cc \u03c7\u03c4\u03c5\u03c0\u03b9\u03ad\u03c4\u03b1\u03b9 &#8211; \u03b1\u03c0\u03cc \u03c4\u03b9\u03c2 \u03b5\u03b9\u03ba\u03cc\u03bd\u03b5\u03c2, \u03b4\u03b5\u03bd \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03ba\u03b1\u03bd\u03b5\u03af\u03c2 \u03bd\u03b1 \u03c3\u03c5\u03bc\u03c0\u03b5\u03c1\u03ac\u03bd\u03b5\u03b9 \u03c4\u03b7\u03bd \u03b1\u03ba\u03c1\u03b9\u03b2\u03ae \u03ba\u03b1\u03c4\u03b1\u03bd\u03bf\u03bc\u03ae \u03c4\u03bf\u03c5 \u03bd\u03b5\u03c1\u03bf\u03cd \u03bc\u03ad\u03c3\u03b1 \u03c3\u03c4\u03b7 \u03c6\u03b9\u03ac\u03bb\u03b7. \u0395\u03b4\u03ce, \u03c0\u03c1\u03bf\u03c7\u03c9\u03c1\u03bf\u03cd\u03bc\u03b5 \u03b1\u03c0\u03bb\u03ce\u03c2 \u03c3\u03b5 \u03bc\u03b9\u03b1 \u03b1\u03bd\u03ac\u03bb\u03c5\u03c3\u03b7 \u03ba\u03b1\u03c4\u03ac \u03c0\u03c1\u03bf\u03c3\u03ad\u03b3\u03b3\u03b9\u03c3\u03b7 \u03c0\u03bf\u03c5 \u03c0\u03b5\u03c1\u03b9\u03b3\u03c1\u03ac\u03c6\u03b5\u03c4\u03b1\u03b9 \u03bb\u03b5\u03c0\u03c4\u03bf\u03bc\u03b5\u03c1\u03ce\u03c2 \u03c3\u03c4\u03bf \u039a\u03b5\u03c6. III \u0392, \u03bc\u03b5 \u03b2\u03ac\u03c3\u03b7 \u03c4\u03bf \u03bc\u03ad\u03b3\u03b9\u03c3\u03c4\u03bf \u03cd\u03c8\u03bf\u03c2 \u03c4\u03b7\u03c2 \u03bc\u03ac\u03b6\u03b1\u03c2 \u03bd\u03b5\u03c1\u03bf\u03cd \u03ba\u03b1\u03c4\u03ac \u03bc\u03ae\u03ba\u03bf\u03c2 \u03c4\u03b7\u03c2 \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2. \u0391\u03c5\u03c4\u03ae \u03b7 \u03c0\u03bf\u03bb\u03c5\u03c0\u03bb\u03bf\u03ba\u03cc\u03c4\u03b7\u03c4\u03b1 \u03c4\u03b7\u03c2 \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2 \u03bd\u03b5\u03c1\u03bf\u03cd [\u0395\u03b9. 1 (\u03b1)] \u03b5\u03af\u03bd\u03b1\u03b9 \u03c4\u03bf \u03ba\u03cd\u03c1\u03b9\u03bf \u03ba\u03af\u03bd\u03b7\u03c4\u03c1\u03cc \u03bc\u03b1\u03c2 \u03b3\u03b9\u03b1 \u03c4\u03b7\u03bd \u03b5\u03b9\u03c3\u03b1\u03b3\u03c9\u03b3\u03ae \u03c4\u03b7\u03c2 \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2 \u03c4\u03ad\u03bd\u03b9\u03c2 [\u0395\u03b9\u03ba. 1 (\u03b2)]. \u0394\u03b7\u03bb\u03b1\u03b4\u03ae, \u03bf\u03b9 \u03b1\u03ba\u03c1\u03b9\u03b2\u03b5\u03af\u03c2 \u03b8\u03ad\u03c3\u03b5\u03b9\u03c2 \u03c4\u03c9\u03bd \u03bc\u03c0\u03b1\u03bb\u03ce\u03bd \u03c4\u03bf\u03c5 \u03c4\u03ad\u03bd\u03b9\u03c2 \u03c0\u03c1\u03bf\u03c3\u03b4\u03b9\u03bf\u03c1\u03af\u03b6\u03bf\u03bd\u03c4\u03b1\u03b9 \u03b5\u03cd\u03ba\u03bf\u03bb\u03b1. \u03a3\u03c4\u03b7 \u03c3\u03c5\u03bd\u03ad\u03c7\u03b5\u03b9\u03b1, \u03c0\u03b1\u03af\u03c1\u03bd\u03bf\u03c5\u03bc\u03b5 \u03c4\u03bf \u03ba\u03ad\u03bd\u03c4\u03c1\u03bf \u03bc\u03ac\u03b6\u03b1\u03c2 \u03bb\u03b1\u03bc\u03b2\u03ac\u03bd\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c4\u03bf \u03c3\u03c4\u03b1\u03b8\u03bc\u03b9\u03c3\u03bc\u03ad\u03bd\u03bf \u03ba\u03b1\u03c4\u03ac \u03bc\u03ac\u03b6\u03b1 \u03bc\u03ad\u03c3\u03bf \u03cc\u03c1\u03bf \u03c4\u03c9\u03bd \u03b8\u03ad\u03c3\u03b5\u03c9\u03bd \u03c4\u03c9\u03bd \u03b4\u03cd\u03bf \u03c3\u03c6\u03b1\u03b9\u03c1\u03ce\u03bd \u03ba\u03b1\u03b9 \u03c4\u03bf\u03c5 \u03ba\u03ad\u03bd\u03c4\u03c1\u03bf\u03c5 \u03c4\u03b7\u03c2 \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2.<\/p>\n<p>\u03a3\u03c5\u03bd\u03bf\u03c0\u03c4\u03b9\u03ba\u03ac, \u03bf\u03b9 \u03c0\u03b5\u03b9\u03c1\u03b1\u03bc\u03b1\u03c4\u03b9\u03ba\u03ad\u03c2 \u03bc\u03b5\u03c4\u03c1\u03ae\u03c3\u03b5\u03b9\u03c2 \u03c3\u03c5\u03bd\u03af\u03c3\u03c4\u03b1\u03bd\u03c4\u03b1\u03b9 \u03c3\u03c4\u03b7\u03bd \u03c0\u03b1\u03c1\u03b1\u03ba\u03bf\u03bb\u03bf\u03cd\u03b8\u03b7\u03c3\u03b7 \u03c4\u03b7\u03c2 \u03ba\u03bf\u03c1\u03c5\u03c6\u03ae\u03c2 \u03ba\u03b1\u03b9 \u03c4\u03bf\u03c5 \u03c0\u03c5\u03b8\u03bc\u03ad\u03bd\u03b1 \u03c4\u03b7\u03c2 \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2 \u03c3\u03b5 \u03ba\u03ac\u03b8\u03b5 \u03ba\u03b1\u03c1\u03ad \u03ba\u03b1\u03b9 \u03c3\u03c4\u03b7\u03bd \u03c0\u03b1\u03c1\u03b1\u03ba\u03bf\u03bb\u03bf\u03cd\u03b8\u03b7\u03c3\u03b7 \u03c4\u03c9\u03bd \u03b1\u03ba\u03cc\u03bb\u03bf\u03c5\u03b8\u03c9\u03bd \u03b5\u03c0\u03b9\u03c0\u03c1\u03cc\u03c3\u03b8\u03b5\u03c4\u03c9\u03bd \u03c3\u03b7\u03bc\u03b5\u03af\u03c9\u03bd \u03b3\u03b9\u03b1 \u03c4\u03bf\u03bd \u03c0\u03c1\u03bf\u03c3\u03b4\u03b9\u03bf\u03c1\u03b9\u03c3\u03bc\u03cc \u03c4\u03bf\u03c5 \u03ba\u03ad\u03bd\u03c4\u03c1\u03bf\u03c5 \u03bc\u03ac\u03b6\u03b1\u03c2: \u03b1) \u03a6\u03b9\u03ac\u03bb\u03b7 \u03bd\u03b5\u03c1\u03bf\u03cd: \u03c4\u03bf \u03bc\u03ad\u03b3\u03b9\u03c3\u03c4\u03bf \u03cd\u03c8\u03bf\u03c2 h \u03c4\u03bf\u03c5 \u03bd\u03b5\u03c1\u03bf\u03cd \u03c0\u03bf\u03c5 \u03b1\u03bd\u03b1\u03c4\u03b1\u03c1\u03ac\u03c3\u03c3\u03b5\u03c4\u03b1\u03b9 \u03c3\u03b5 \u03ba\u03ac\u03b8\u03b5 \u03ba\u03b1\u03c1\u03ad (\u03b2\u03bb\u03ad\u03c0\u03b5 <a href=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2018\/09\/Bottle-2.jpg\" target=\"_blank\" rel=\"noopener\">\u0395\u03b9\u03ba. 2<\/a>). (\u03b2) \u039c\u03c0\u03bf\u03c5\u03ba\u03ac\u03bb\u03b9 \u03c4\u03ad\u03bd\u03b9\u03c2: \u03b7 \u03b8\u03ad\u03c3\u03b7 \u03c4\u03c9\u03bd \u03bc\u03c0\u03b1\u03bb\u03ce\u03bd \u03c4\u03bf\u03c5 \u03c4\u03ad\u03bd\u03b9\u03c2 \u03ba\u03b1\u03c4\u03ac \u03ba\u03ac\u03b8\u03b5 \u03ba\u03b1\u03c1\u03ad \u03ba\u03b1\u03c4\u03ac \u03c4\u03b7 \u03b4\u03b9\u03ac\u03c1\u03ba\u03b5\u03b9\u03b1 \u03c4\u03b7\u03c2 \u03b1\u03bd\u03b1\u03c3\u03c4\u03c1\u03bf\u03c6\u03ae\u03c2. \u039f\u03b9 \u03bb\u03b7\u03c6\u03b8\u03ae\u03c3\u03b5\u03c2 \u03c8\u03b7\u03c6\u03b9\u03b1\u03ba\u03ad\u03c2 \u03b5\u03b9\u03ba\u03cc\u03bd\u03b5\u03c2 \u03b5\u03b9\u03c3\u03ae\u03c7\u03b8\u03b7\u03c3\u03b1\u03bd \u03c3\u03b5 \u03ad\u03bd\u03b1\u03bd \u03c5\u03c0\u03bf\u03bb\u03bf\u03b3\u03b9\u03c3\u03c4\u03ae \u03ba\u03b1\u03b9 \u03b7 \u03c0\u03b1\u03c1\u03b1\u03ba\u03bf\u03bb\u03bf\u03cd\u03b8\u03b7\u03c3\u03b7 \u03c0\u03c1\u03b1\u03b3\u03bc\u03b1\u03c4\u03bf\u03c0\u03bf\u03b9\u03ae\u03b8\u03b7\u03ba\u03b5 \u03c7\u03b5\u03b9\u03c1\u03bf\u03ba\u03af\u03bd\u03b7\u03c4\u03b1 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03ce\u03bd\u03c4\u03b1\u03c2 \u03c4\u03b7 \u03bc\u03ad\u03b8\u03bf\u03b4\u03bf ImageJ, \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03ce\u03bd\u03c4\u03b1\u03c2 \u03b1\u03c0\u03bb\u03ac \u03c4\u03bf \u03c3\u03b7\u03bc\u03b5\u03b9\u03b1\u03ba\u03cc \u03b5\u03c1\u03b3\u03b1\u03bb\u03b5\u03af\u03bf \u03bc\u03b5 \u03b1\u03c5\u03c4\u03cc\u03bc\u03b1\u03c4\u03b7 \u03bc\u03ad\u03c4\u03c1\u03b7\u03c3\u03b7. \u03a4\u03b1 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03b1 \u03c3\u03c4\u03b7 \u03c3\u03c5\u03bd\u03ad\u03c7\u03b5\u03b9\u03b1 \u03c5\u03c0\u03bf\u03b2\u03bb\u03ae\u03b8\u03b7\u03ba\u03b1\u03bd \u03c3\u03b5 \u03b5\u03c0\u03b5\u03be\u03b5\u03c1\u03b3\u03b1\u03c3\u03af\u03b1 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03ce\u03bd\u03c4\u03b1\u03c2 \u03c4\u03bf MATLAB. \u038c\u03bb\u03b1 \u03c4\u03b1 \u03c3\u03cd\u03bd\u03bf\u03bb\u03b1 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd \u03c0\u03bf\u03c5 \u03bb\u03ae\u03c6\u03b8\u03b7\u03ba\u03b1\u03bd \u03bc\u03b5 \u03c4\u03bf \u03c7\u03ad\u03c1\u03b9 \u03b5\u03be\u03bf\u03bc\u03b1\u03bb\u03cd\u03bd\u03b8\u03b7\u03ba\u03b1\u03bd \u03b3\u03b9\u03b1 \u03bd\u03b1 \u03bc\u03b5\u03b9\u03c9\u03b8\u03b5\u03af \u03b7 \u03b7 \u03bc\u03b5\u03c1\u03bf\u03bb\u03b7\u03c8\u03af\u03b1 \u03ba\u03b1\u03b9 \u03bf \u03b8\u03cc\u03c1\u03c5\u03b2\u03bf\u03c2 \u03c0\u03bf\u03c5 \u03c0\u03c1\u03bf\u03ba\u03b1\u03bb\u03b5\u03af\u03c4\u03b1\u03b9 \u03b1\u03c0\u03cc \u03c4\u03bf\u03bd \u03c7\u03c1\u03ae\u03c3\u03c4\u03b7.<\/p>\n<div id=\"attachment_6814\" style=\"width: 391px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2018\/09\/Bottle-2.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-6814\" class=\"wp-image-6814\" src=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2018\/09\/Bottle-2-300x214.jpg\" alt=\"\" width=\"381\" height=\"272\" srcset=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2018\/09\/Bottle-2-300x214.jpg 300w, https:\/\/viewonphysics.gr\/wp-content\/uploads\/2018\/09\/Bottle-2.jpg 500w\" sizes=\"auto, (max-width: 381px) 100vw, 381px\" \/><\/a><p id=\"caption-attachment-6814\" class=\"wp-caption-text\">\u0395\u03b9\u03ba. 2. \u03a3\u03c7\u03ad\u03b4\u03b9\u03bf \u03c4\u03c9\u03bd \u03b3\u03b5\u03c9\u03bc\u03b5\u03c4\u03c1\u03b9\u03ba\u03ce\u03bd \u03c0\u03b1\u03c1\u03b1\u03bc\u03ad\u03c4\u03c1\u03c9\u03bd \u03b3\u03b9\u03b1 \u03c4\u03b7 \u03c6\u03b9\u03ac\u03bb\u03b7 \u03bd\u03b5\u03c1\u03bf\u03cd \u03ba\u03b1\u03b9 \u03c6\u03b9\u03ac\u03bb\u03b9 \u03c4\u03ad\u03bd\u03b9\u03c2. \u03a4\u03bf \u03c3\u03c5\u03bd\u03bf\u03bb\u03b9\u03ba\u03cc \u03cd\u03c8\u03bf\u03c2 \u03c4\u03b7\u03c2 \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 H, \u03b5\u03bd\u03ce \u03b7 \u03ba\u03b1\u03c4\u03b1\u03bd\u03bf\u03bc\u03ae \u03c4\u03bf\u03c5 \u03bd\u03b5\u03c1\u03bf\u03cd\/\u03bc\u03c0\u03b1\u03bb\u03ce\u03bd \u03c3\u03c5\u03bc\u03b2\u03bf\u03bb\u03af\u03b6\u03b5\u03c4\u03b1\u03b9 \u03bc\u03b5 h. \u03a6\u03b1\u03af\u03bd\u03b5\u03c4\u03b1\u03b9 \u03b5\u03c0\u03af\u03c3\u03b7\u03c2 \u03bf\u00a0 \u03ac\u03be\u03bf\u03bd\u03b1\u03c2 \u03c0\u03b5\u03c1\u03b9\u03c3\u03c4\u03c1\u03bf\u03c6\u03ae\u03c2.<\/p><\/div>\n<p>\u03a4\u03b1 \u03c0\u03b5\u03b9\u03c1\u03ac\u03bc\u03b1\u03c4\u03b1 \u03c0\u03bf\u03c5 \u03c0\u03b1\u03c1\u03bf\u03c5\u03c3\u03b9\u03ac\u03b6\u03bf\u03bd\u03c4\u03b1\u03b9 \u03c0\u03b1\u03c1\u03b1\u03ba\u03ac\u03c4\u03c9 \u03c0\u03c1\u03b1\u03b3\u03bc\u03b1\u03c4\u03bf\u03c0\u03bf\u03b9\u03ae\u03b8\u03b7\u03ba\u03b1\u03bd \u03bc\u03b5 \u03bc\u03c0\u03bf\u03c5\u03ba\u03ac\u03bb\u03b9 \u03bd\u03b5\u03c1\u03bf\u03cd \u03bc\u03ac\u03b6\u03b1\u03c2 <span style=\"font-size: 12pt;\">m<sub>b<\/sub> = 25 g<\/span> \u03ba\u03b1\u03b9 \u03cd\u03c8\u03bf\u03c5\u03c2 <span style=\"font-size: 12pt;\">\u0397 = 23 cm<\/span>. \u03a4\u03bf \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03bf\u03cd\u03bc\u03b5\u03bd\u03bf \u03ba\u03bb\u03ac\u03c3\u03bc\u03b1 \u03c0\u03bb\u03ae\u03c1\u03c9\u03c3\u03b7\u03c2 \u03ae\u03c4\u03b1\u03bd <span style=\"font-size: 12pt;\">0,39<\/span>. \u0393\u03b9\u03b1 \u03c4\u03b1 \u03c0\u03b5\u03b9\u03c1\u03ac\u03bc\u03b1\u03c4\u03b1 \u03bc\u03b5 \u03c6\u03b9\u03ac\u03bb\u03b5\u03c2 \u03c4\u03bf\u03c5 \u03c4\u03ad\u03bd\u03b9\u03c2, \u03bc\u03b9\u03b1 \u03bc\u03c0\u03ac\u03bb\u03b1 \u03c4\u03ad\u03bd\u03b9\u03c2 \u03ad\u03c7\u03b5\u03b9 \u03bc\u03ac\u03b6\u03b1 <span style=\"font-size: 12pt;\">58 g<\/span>. \u03c4\u03bf \u03bc\u03c0\u03bf\u03c5\u03ba\u03ac\u03bb\u03b9 \u03c4\u03bf\u03c5 \u03c4\u03ad\u03bd\u03b9\u03c2 \u03ad\u03c7\u03b5\u03b9 \u03bc\u03ac\u03b6\u03b1 <span style=\"font-size: 12pt;\">48 g<\/span>, \u03cd\u03c8\u03bf\u03c2 <span style=\"font-size: 12pt;\">28 cm<\/span> \u03ba\u03b1\u03b9 \u03b1\u03ba\u03c4\u03af\u03bd\u03b1 <span style=\"font-size: 12pt;\">3,7 cm<\/span>.<\/p>\n<h3><strong><span style=\"color: #0000ff;\">\u0392. \u0391\u03c0\u03bf\u03c4\u03b5\u03bb\u03ad\u03c3\u03bc\u03b1\u03c4\u03b1<\/span><\/strong><\/h3>\n<p>\u0397 <a href=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2018\/10\/Bottle-3.jpg\">\u0395\u03b9\u03ba. 3<\/a>\u00a0 \u03b4\u03b5\u03af\u03c7\u03bd\u03b5\u03b9 \u03c4\u03b9\u03c2 \u03c4\u03c5\u03c0\u03b9\u03ba\u03ad\u03c2 \u03c4\u03c1\u03bf\u03c7\u03b9\u03ad\u03c2 \u03c0\u03bf\u03c5 \u03bb\u03b1\u03bc\u03b2\u03ac\u03bd\u03bf\u03bd\u03c4\u03b1\u03b9 \u03b1\u03c0\u03cc \u03c4\u03b1 \u03c0\u03b5\u03b9\u03c1\u03ac\u03bc\u03b1\u03c4\u03ac \u03bc\u03b1\u03c2 \u03c3\u03c4\u03b7\u03bd \u03ac\u03ba\u03b1\u03bc\u03c0\u03c4\u03b7 \u03c6\u03b9\u03ac\u03bb\u03b7 (a), \u03c4\u03b7 \u03c6\u03b9\u03ac\u03bb\u03b7 \u03bd\u03b5\u03c1\u03bf\u03cd (b) \u03ba\u03b1\u03b9 \u03c4\u03b7 \u03c6\u03b9\u03ac\u03bb\u03b7 \u03c4\u03ad\u03bd\u03b9\u03c2 (c). \u039f\u03b9 \u03b4\u03b9\u03ac\u03c6\u03bf\u03c1\u03b5\u03c2 \u03ba\u03b1\u03bc\u03c0\u03cd\u03bb\u03b5\u03c2, \u03b1\u03bd\u03c4\u03af\u03c3\u03c4\u03bf\u03b9\u03c7\u03b1, \u03b5\u03bd\u03c4\u03bf\u03c0\u03af\u03b6\u03bf\u03c5\u03bd \u03c4\u03b9\u03c2 \u03ac\u03ba\u03c1\u03b5\u03c2 \u03c4\u03b7\u03c2 \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2 (\u03b3\u03ba\u03c1\u03af\u03b6\u03b5\u03c2 \u03b3\u03c1\u03b1\u03bc\u03bc\u03ad\u03c2) \u03ba\u03b1\u03b9 \u03c4\u03bf \u03ba\u03ad\u03bd\u03c4\u03c1\u03bf \u03c4\u03b7\u03c2 \u03bc\u03ac\u03b6\u03b1\u03c2 (\u03bc\u03c0\u03bb\u03b5 \u03b3\u03c1\u03b1\u03bc\u03bc\u03ad\u03c2). \u03a3\u03b5 \u03cc\u03bb\u03b5\u03c2 \u03c4\u03b9\u03c2 \u03c0\u03b5\u03c1\u03b9\u03c0\u03c4\u03ce\u03c3\u03b5\u03b9\u03c2, \u03c4\u03bf \u03ba\u03ad\u03bd\u03c4\u03c1\u03bf \u03bc\u03ac\u03b6\u03b1\u03c2 \u03b1\u03ba\u03bf\u03bb\u03bf\u03c5\u03b8\u03b5\u03af \u03c4\u03b7\u03bd \u03b1\u03bd\u03b1\u03bc\u03b5\u03bd\u03cc\u03bc\u03b5\u03bd\u03b7 \u03c0\u03b1\u03c1\u03b1\u03b2\u03bf\u03bb\u03b9\u03ba\u03ae \u03c4\u03c1\u03bf\u03c7\u03b9\u03ac \u03c0\u03bf\u03c5 \u03c3\u03c7\u03b5\u03c4\u03af\u03b6\u03b5\u03c4\u03b1\u03b9 \u03bc\u03b5 \u03c4\u03b7\u03bd \u03ba\u03af\u03bd\u03b7\u03c3\u03b7 \u03c4\u03b7\u03c2 \u03b5\u03bb\u03b5\u03cd\u03b8\u03b5\u03c1\u03b7\u03c2 \u03c0\u03c4\u03ce\u03c3\u03b7\u03c2. \u0397 \u03c0\u03b1\u03c1\u03b1\u03b2\u03bf\u03bb\u03ae \u03b5\u03af\u03bd\u03b1\u03b9 \u03ba\u03b1\u03c4\u03b1\u03c6\u03b1\u03bd\u03ce\u03c2 \u03c0\u03b1\u03c1\u03b1\u03b4\u03b5\u03ba\u03c4\u03ae \u03b3\u03b9\u03b1 \u03c4\u03bf \u03ac\u03ba\u03b1\u03bc\u03c0\u03c4\u03bf \u03bc\u03c0\u03bf\u03c5\u03ba\u03ac\u03bb\u03b9 \u03ba\u03b1\u03b9 \u03c4\u03bf \u03bc\u03c0\u03bf\u03c5\u03ba\u03ac\u03bb\u03b9 \u03c4\u03ad\u03bd\u03b9\u03c2 [\u0395\u03b9\u03ba. 3 (a) \u03ba\u03b1\u03b9 3 (c)]. \u03a3\u03b5 \u03b1\u03c5\u03c4\u03ac \u03c4\u03b1 \u03c0\u03b5\u03b9\u03c1\u03ac\u03bc\u03b1\u03c4\u03b1, \u03c4\u03bf \u03ba\u03ad\u03bd\u03c4\u03c1\u03bf \u03c4\u03b7\u03c2 \u03bc\u03ac\u03b6\u03b1\u03c2 \u03c0\u03c1\u03ac\u03b3\u03bc\u03b1\u03c4\u03b9 \u03c0\u03c1\u03bf\u03c3\u03b4\u03b9\u03bf\u03c1\u03af\u03c3\u03c4\u03b7\u03ba\u03b5 \u03bc\u03b5 \u03b1\u03ba\u03c1\u03af\u03b2\u03b5\u03b9\u03b1, \u03b5\u03bd\u03ce \u03b1\u03c5\u03c4\u03ae \u03b7 \u03bc\u03ad\u03c4\u03c1\u03b7\u03c3\u03b7 \u03ae\u03c4\u03b1\u03bd \u03c0\u03b5\u03c1\u03b9\u03c3\u03c3\u03cc\u03c4\u03b5\u03c1\u03bf \u03ba\u03b1\u03c4\u03ac \u03c0\u03c1\u03bf\u03c3\u03ad\u03b3\u03b3\u03b9\u03c3\u03b7 \u03b3\u03b9\u03b1 \u03c4\u03b7\u03bd \u03c0\u03b5\u03c1\u03af\u03c0\u03c4\u03c9\u03c3\u03b7 \u03c4\u03bf\u03c5 \u03ba\u03b9\u03bd\u03bf\u03cd\u03bc\u03b5\u03bd\u03bf\u03c5 \u03bd\u03b5\u03c1\u03bf\u03cd [\u0395\u03b9\u03ba. 3 (b)].<\/p>\n<div id=\"attachment_6859\" style=\"width: 493px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-6859\" class=\" wp-image-6859\" src=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2018\/10\/Bottle-3-1-300x157.jpg\" alt=\"\" width=\"483\" height=\"253\" srcset=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2018\/10\/Bottle-3-1-300x157.jpg 300w, https:\/\/viewonphysics.gr\/wp-content\/uploads\/2018\/10\/Bottle-3-1.jpg 734w\" sizes=\"auto, (max-width: 483px) 100vw, 483px\" \/><p id=\"caption-attachment-6859\" class=\"wp-caption-text\">\u0395\u03b9\u03ba. 3. \u0391\u03bd\u03ac\u03bb\u03c5\u03c3\u03b7 \u03c4\u03b7\u03c2 \u03ba\u03af\u03bd\u03b7\u03c3\u03b7\u03c2 \u03ba\u03b1\u03c4\u03ac \u03c4\u03b7 \u03b4\u03b9\u03ac\u03c1\u03ba\u03b5\u03b9\u03b1 \u03c4\u03b7\u03c2 \u03b1\u03bd\u03b1\u03c3\u03c4\u03c1\u03bf\u03c6\u03ae\u03c2 \u03b3\u03b9\u03b1 (a) \u03bc\u03c0\u03bf\u03c5\u03ba\u03ac\u03bb\u03b9 \u03bc\u03b5 \u03b1\u03ba\u03b9\u03bd\u03b7\u03c4\u03bf\u03c0\u03bf\u03b9\u03b7\u03bc\u03ad\u03bd\u03b7 \u03bc\u03ac\u03b6\u03b1, (b) \u03c6\u03b9\u03ac\u03bb\u03b7 \u03bd\u03b5\u03c1\u03bf\u03cd \u03ba\u03b1\u03b9 (c) \u03bc\u03c0\u03bf\u03c5\u03ba\u03ac\u03bb\u03b9 \u03c4\u03ad\u03bd\u03b9\u03c2. \u03a3\u03b5 \u03cc\u03bb\u03b1 \u03c4\u03b1 \u03c0\u03bb\u03b1\u03af\u03c3\u03b9\u03b1, \u03bf\u03b9 \u03b3\u03ba\u03c1\u03b9 \u03b4\u03b9\u03b1\u03ba\u03b5\u03ba\u03bf\u03bc\u03bc\u03ad\u03bd\u03b5\u03c2 \u03b3\u03c1\u03b1\u03bc\u03bc\u03ad\u03c2 \u03b1\u03bd\u03c4\u03b9\u03c0\u03c1\u03bf\u03c3\u03c9\u03c0\u03b5\u03cd\u03bf\u03c5\u03bd \u03c4\u03b9\u03c2 \u03c3\u03cd\u03bd\u03b8\u03b5\u03c4\u03b5\u03c2 \u03c4\u03c1\u03bf\u03c7\u03b9\u03ad\u03c2 \u03c4\u03bf\u03c5 \u03ac\u03bd\u03c9 \u03ba\u03b1\u03b9 \u03c4\u03bf\u03c5 \u03ba\u03ac\u03c4\u03c9 \u03bc\u03ad\u03c1\u03bf\u03c5\u03c2 \u03c4\u03b7\u03c2 \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2. \u039f\u03b9 \u03c3\u03c5\u03bd\u03b5\u03c7\u03cc\u03bc\u03b5\u03bd\u03b5\u03c2 \u03bc\u03c0\u03bb\u03b5 \u03b3\u03c1\u03b1\u03bc\u03bc\u03ad\u03c2 \u03c0\u03b5\u03c1\u03b9\u03b3\u03c1\u03ac\u03c6\u03bf\u03c5\u03bd \u03c4\u03b7\u03bd \u03ba\u03af\u03bd\u03b7\u03c3\u03b7 \u03c4\u03bf\u03c5 \u03ba\u03ad\u03bd\u03c4\u03c1\u03bf\u03c5 \u03bc\u03ac\u03b6\u03b1\u03c2, \u03c4\u03bf \u03bf\u03c0\u03bf\u03af\u03bf \u03c3\u03b5 \u03bc\u03b9\u03b1 \u03ba\u03b1\u03bb\u03ae \u03c0\u03c1\u03bf\u03c3\u03ad\u03b3\u03b3\u03b9\u03c3\u03b7 \u03b2\u03c1\u03af\u03c3\u03ba\u03b5\u03c4\u03b1\u03b9 \u03bd\u03b1 \u03b1\u03ba\u03bf\u03bb\u03bf\u03c5\u03b8\u03b5\u03af \u03bc\u03b9\u03b1 \u03c0\u03b1\u03c1\u03b1\u03b2\u03bf\u03bb\u03b9\u03ba\u03ae \u03c4\u03c1\u03bf\u03c7\u03b9\u03ac. \u03a3\u03c4\u03b1 \u03c0\u03b5\u03b9\u03c1\u03ac\u03bc\u03b1\u03c4\u03b1 \u03c0\u03bf\u03c5 \u03b4\u03b5\u03af\u03c7\u03bd\u03bf\u03bd\u03c4\u03b1\u03b9, H = 23 cm \u03b3\u03b9\u03b1 \u03c4\u03b1 \u03ac\u03ba\u03b1\u03bc\u03c0\u03c4\u03b1 \u03ba\u03b1\u03b9 \u03c4\u03b1 \u03bc\u03c0\u03bf\u03c5\u03ba\u03ac\u03bb\u03b9\u03b1 \u03bd\u03b5\u03c1\u03bf\u03cd \u03ba\u03b1\u03b9 28 cm \u03b3\u03b9\u03b1 \u03c4\u03bf \u03bc\u03c0\u03bf\u03c5\u03ba\u03ac\u03bb\u03b9 \u03c4\u03bf\u03c5 \u03c4\u03ad\u03bd\u03b9\u03c2.<\/p><\/div>\n<p>\u03a4\u03bf \u03ba\u03cd\u03c1\u03b9\u03bf \u03b5\u03bd\u03b4\u03b9\u03b1\u03c6\u03ad\u03c1\u03bf\u03bd \u03bc\u03b1\u03c2, \u03c9\u03c3\u03c4\u03cc\u03c3\u03bf, \u03ad\u03b3\u03ba\u03b5\u03b9\u03c4\u03b1\u03b9 \u03c3\u03c4\u03b9\u03c2 \u03c0\u03b5\u03c1\u03b9\u03c3\u03c4\u03c1\u03bf\u03c6\u03b9\u03ba\u03ad\u03c2 \u03c0\u03c4\u03c5\u03c7\u03ad\u03c2 \u03c4\u03b7\u03c2 \u03ba\u03af\u03bd\u03b7\u03c3\u03b7\u03c2. \u0395\u03af\u03bd\u03b1\u03b9 \u03c6\u03b1\u03bd\u03b5\u03c1\u03cc \u03b1\u03c0\u03cc \u03c4\u03b7\u03bd <a href=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2018\/10\/Bottle-3.jpg\" target=\"_blank\" rel=\"noopener\">\u0395\u03b9\u03ba. 3<\/a> \u03cc\u03c4\u03b9 \u03b7 \u03c0\u03b5\u03c1\u03b9\u03c3\u03c4\u03c1\u03bf\u03c6\u03ae \u03c4\u03b7\u03c2 \u03ac\u03ba\u03b1\u03bc\u03c0\u03c4\u03b7\u03c2 \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03c0\u03bf\u03bb\u03cd \u03b4\u03b9\u03b1\u03c6\u03bf\u03c1\u03b5\u03c4\u03b9\u03ba\u03ae \u03c4\u03cc\u03c3\u03bf \u03b1\u03c0\u03cc \u03c4\u03b7 \u03c6\u03b9\u03ac\u03bb\u03b7 \u03bd\u03b5\u03c1\u03bf\u03cd \u03cc\u03c3\u03bf \u03ba\u03b1\u03b9 \u03b1\u03c0\u03cc \u03c4\u03b7 \u03c6\u03b9\u03ac\u03bb\u03b7 \u03c4\u03ad\u03bd\u03b9\u03c2. \u0391\u03c5\u03c4\u03cc \u03c0\u03bf\u03c3\u03bf\u03c4\u03b9\u03ba\u03bf\u03c0\u03bf\u03b9\u03b5\u03af\u03c4\u03b1\u03b9 \u03c0\u03b5\u03c1\u03b1\u03b9\u03c4\u03ad\u03c1\u03c9 \u03bb\u03b1\u03bc\u03b2\u03ac\u03bd\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c5\u03c0\u03cc\u03c8\u03b7 \u03c4\u03b7\u03bd \u03b3\u03c9\u03bd\u03b9\u03b1\u03ba\u03ae \u03c4\u03b1\u03c7\u03cd\u03c4\u03b7\u03c4\u03b1 <span style=\"font-size: 12pt;\">\u03c9 = d\u03b8\/dt<\/span>, \u03cc\u03c0\u03bf\u03c5 \u03b7 \u03b3\u03c9\u03bd\u03af\u03b1 \u03b8(t) \u03c0\u03b5\u03c1\u03b9\u03b3\u03c1\u03ac\u03c6\u03b5\u03b9 \u03c4\u03bf\u03bd \u03c0\u03c1\u03bf\u03c3\u03b1\u03bd\u03b1\u03c4\u03bf\u03bb\u03b9\u03c3\u03bc\u03cc \u03c4\u03b7\u03c2 \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2 \u03bc\u03b5 \u03c4\u03b7\u03bd \u03c0\u03ac\u03c1\u03bf\u03b4\u03bf \u03c4\u03bf\u03c5 \u03c7\u03c1\u03cc\u03bd\u03bf\u03c5. \u03a4\u03b1 \u03b1\u03ba\u03b1\u03c4\u03ad\u03c1\u03b3\u03b1\u03c3\u03c4\u03b1 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03b1 \u03c4\u03bf\u03c5 <span style=\"font-size: 12pt;\">\u0394\u03b8(t) = \u03b8(t) &#8211; \u03b8(t = 0)<\/span> \u03c6\u03b1\u03af\u03bd\u03bf\u03bd\u03c4\u03b1\u03b9 \u03c3\u03c4\u03bf \u03c0\u03b1\u03c1\u03ad\u03bd\u03b8\u03b5\u03bc\u03b1 \u03c4\u03b7\u03c2 <a href=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2018\/10\/Bottle-4-2.jpg\">\u0395\u03b9\u03ba. 4<\/a>. \u039c\u03b5\u03c4\u03ac \u03c4\u03b7\u03bd \u03b5\u03be\u03bf\u03bc\u03ac\u03bb\u03c5\u03bd\u03c3\u03b7, \u03b4\u03b9\u03b1\u03c6\u03bf\u03c1\u03af\u03b6\u03bf\u03c5\u03bc\u03b5 \u03c4\u03bf <span style=\"font-size: 12pt;\">\u0394\u03b8(t)<\/span> \u03ba\u03b1\u03b9 \u03bb\u03b1\u03bc\u03b2\u03ac\u03bd\u03bf\u03c5\u03bc\u03b5 \u03c4\u03bf <span style=\"font-size: 12pt;\">\u03c9(t)<\/span>. \u03a3\u03c4\u03b7\u03bd <a href=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2018\/10\/Bottle-4-1.jpg\" target=\"_blank\" rel=\"noopener\">\u0395\u03b9\u03ba. 4<\/a>, \u03c3\u03c7\u03b5\u03b4\u03b9\u03ac\u03b6\u03bf\u03c5\u03bc\u03b5 \u03c4\u03bf \u03c9 (\u03ba\u03b1\u03bd\u03bf\u03bd\u03b9\u03ba\u03bf\u03c0\u03bf\u03b9\u03b7\u03bc\u03ad\u03bd\u03bf \u03b1\u03c0\u03cc \u03c4\u03b7\u03bd \u03b1\u03c1\u03c7\u03b9\u03ba\u03ae \u03c4\u03b9\u03bc\u03ae \u03c9<sub>0<\/sub>) \u03c3\u03b5 \u03c3\u03c5\u03bd\u03ac\u03c1\u03c4\u03b7\u03c3\u03b7 \u03bc\u03b5 \u03c4\u03bf \u03c7\u03c1\u03cc\u03bd\u03bf (\u03ba\u03b1\u03bd\u03bf\u03bd\u03b9\u03ba\u03bf\u03c0\u03bf\u03b9\u03b7\u03bc\u03ad\u03bd\u03bf \u03b1\u03c0\u03cc \u03c4\u03bf\u03bd \u03c7\u03c1\u03cc\u03bd\u03bf \u03c0\u03c1\u03bf\u03c3\u03b3\u03b5\u03af\u03c9\u03c3\u03b7\u03c2 t<sub>f<\/sub>). \u038c\u03c0\u03c9\u03c2 \u03b1\u03bd\u03b1\u03bc\u03b5\u03bd\u03cc\u03c4\u03b1\u03bd, \u03b7 \u03b3\u03c9\u03bd\u03b9\u03b1\u03ba\u03ae \u03c4\u03b1\u03c7\u03cd\u03c4\u03b7\u03c4\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 \u03b1\u03c0\u03cc\u03bb\u03c5\u03c4\u03b1 \u03c3\u03c4\u03b1\u03b8\u03b5\u03c1\u03ae \u03b3\u03b9\u03b1 \u03c4\u03bf \u03ac\u03ba\u03b1\u03bc\u03c0\u03c4\u03bf \u03bc\u03c0\u03bf\u03c5\u03ba\u03ac\u03bb\u03b9 (\u03c4\u03b7\u03bd \u03bf\u03c1\u03b9\u03b6\u03cc\u03bd\u03c4\u03b9\u03b1 \u03c3\u03b5\u03b9\u03c1\u03ac \u03b3\u03b5\u03bc\u03ac\u03c4\u03c9\u03bd \u03ba\u03cd\u03ba\u03bb\u03c9\u03bd, \u03c7\u03c1\u03ce\u03bc\u03b1\u03c4\u03bf\u03c2 \u03ba\u03cc\u03ba\u03ba\u03b9\u03bd\u03bf\u03c5). \u0391\u03bd\u03c4\u03af\u03b8\u03b5\u03c4\u03b1, \u03c4\u03bf \u03c9 \u03c6\u03b1\u03af\u03bd\u03b5\u03c4\u03b1\u03b9 \u03bd\u03b1 \u03bc\u03b5\u03b9\u03ce\u03bd\u03b5\u03c4\u03b1\u03b9 \u03b4\u03c1\u03b1\u03bc\u03b1\u03c4\u03b9\u03ba\u03ac \u03c4\u03cc\u03c3\u03bf \u03b3\u03b9\u03b1 \u03c4\u03bf \u03bc\u03c0\u03bf\u03c5\u03ba\u03ac\u03bb\u03b9 \u03bd\u03b5\u03c1\u03bf\u03cd (\u03ba\u03b1\u03bc\u03c0\u03cd\u03bb\u03b7 \u03c0\u03c5\u03b8\u03bc\u03ad\u03bd\u03b1 \u03b3\u03b5\u03bc\u03ac\u03c4\u03c9\u03bd \u03ba\u03cd\u03ba\u03bb\u03c9\u03bd, \u03bc\u03c0\u03bb\u03b5) \u03cc\u03c3\u03bf \u03ba\u03b1\u03b9 \u03b3\u03b9\u03b1 \u03c4\u03bf \u03bc\u03c0\u03bf\u03c5\u03ba\u03ac\u03bb\u03b9 \u03c4\u03ad\u03bd\u03b9\u03c2 (\u03b7 \u03bc\u03b5\u03c3\u03b1\u03af\u03b1 \u03ba\u03b1\u03bc\u03c0\u03cd\u03bb\u03b7 \u03b3\u03b5\u03bc\u03ac\u03c4\u03c9\u03bd \u03ba\u03cd\u03ba\u03bb\u03c9\u03bd, \u03ba\u03af\u03c4\u03c1\u03b9\u03bd\u03bf). \u0391\u03c5\u03c4\u03ac \u03c4\u03b1 \u03b1\u03c0\u03bf\u03c4\u03b5\u03bb\u03ad\u03c3\u03bc\u03b1\u03c4\u03b1 \u03b1\u03c0\u03bf\u03ba\u03b1\u03bb\u03cd\u03c0\u03c4\u03bf\u03c5\u03bd \u03cc\u03c4\u03b9 \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03bd\u03b1 \u03b5\u03c0\u03b9\u03c4\u03b5\u03c5\u03c7\u03b8\u03b5\u03af \u03bc\u03b9\u03b1 \u03ae\u03c0\u03b9\u03b1 \u03c0\u03c1\u03bf\u03c3\u03b3\u03b5\u03af\u03c9\u03c3\u03b7 \u03bb\u03cc\u03b3\u03c9 \u03c4\u03b7\u03c2 \u03c3\u03b7\u03bc\u03b1\u03bd\u03c4\u03b9\u03ba\u03ae\u03c2 \u03bc\u03b5\u03af\u03c9\u03c3\u03b7\u03c2 \u03c4\u03b7\u03c2 \u03b3\u03c9\u03bd\u03b9\u03b1\u03ba\u03ae\u03c2 \u03c4\u03b1\u03c7\u03cd\u03c4\u03b7\u03c4\u03b1\u03c2 \u03c9 \u03c4\u03b7\u03c2 \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2. \u039f\u03b9 \u03b4\u03b9\u03b1\u03ba\u03b5\u03ba\u03bf\u03bc\u03bc\u03ad\u03bd\u03b5\u03c2 \u03b3\u03c1\u03b1\u03bc\u03bc\u03ad\u03c2 \u03c3\u03c4\u03b7\u03bd <a href=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2018\/10\/Bottle-4-2.jpg\" target=\"_blank\" rel=\"noopener\">\u0395\u03b9\u03ba. 4<\/a> \u03b1\u03bd\u03c4\u03b9\u03c3\u03c4\u03bf\u03b9\u03c7\u03bf\u03cd\u03bd \u03c3\u03c4\u03bf \u03bc\u03bf\u03bd\u03c4\u03ad\u03bb\u03bf \u03c0\u03bf\u03c5 \u03b1\u03bd\u03b1\u03c0\u03c4\u03cd\u03c7\u03b8\u03b7\u03ba\u03b5 \u03c3\u03c4\u03bf \u039a\u03b5\u03c6. III.<\/p>\n<div id=\"attachment_6864\" style=\"width: 421px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2018\/10\/Bottle-4-2.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-6864\" class=\"wp-image-6864\" src=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2018\/10\/Bottle-4-2-300x237.jpg\" alt=\"\" width=\"411\" height=\"325\" srcset=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2018\/10\/Bottle-4-2-300x237.jpg 300w, https:\/\/viewonphysics.gr\/wp-content\/uploads\/2018\/10\/Bottle-4-2.jpg 538w\" sizes=\"auto, (max-width: 411px) 100vw, 411px\" \/><\/a><p id=\"caption-attachment-6864\" class=\"wp-caption-text\">\u0395\u03b9\u03ba. 4. \u0397 \u03b3\u03c9\u03bd\u03b9\u03b1\u03ba\u03ae \u03c4\u03b1\u03c7\u03cd\u03c4\u03b7\u03c4\u03b1 \u03c9 \u03c9\u03c2 \u03c3\u03c5\u03bd\u03ac\u03c1\u03c4\u03b7\u03c3\u03b7 \u03c4\u03bf\u03c5 \u03c7\u03c1\u03cc\u03bd\u03bf\u03c5 t, \u03b1\u03bd\u03c4\u03af\u03c3\u03c4\u03bf\u03b9\u03c7\u03b1 \u03ba\u03b1\u03bd\u03bf\u03bd\u03b9\u03ba\u03bf\u03c0\u03bf\u03b9\u03b7\u03bc\u03ad\u03bd\u03b1 \u03b1\u03c0\u03cc \u03c4\u03b7\u03bd \u03b1\u03c1\u03c7\u03b9\u03ba\u03ae \u03b3\u03c9\u03bd\u03b9\u03b1\u03ba\u03ae \u03c4\u03b1\u03c7\u03cd\u03c4\u03b7\u03c4\u03b1 \u03c9<sub>0<\/sub> \u03ba\u03b1\u03b9 \u03c4\u03bf\u03bd \u03c4\u03b5\u03bb\u03b9\u03ba\u03cc \u03c7\u03c1\u03cc\u03bd\u03bf t<sub>f<\/sub>. \u03a4\u03b1 \u03c3\u03cd\u03bd\u03bf\u03bb\u03b1 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd \u03b1\u03bd\u03c4\u03b9\u03c3\u03c4\u03bf\u03b9\u03c7\u03bf\u03cd\u03bd \u03c3\u03c4\u03b7 \u03c6\u03b9\u03ac\u03bb\u03b7 \u03bc\u03b5 \u03b1\u03ba\u03b9\u03bd\u03b7\u03c4\u03bf\u03c0\u03bf\u03b9\u03b7\u03bc\u03ad\u03bd\u03b7 \u03bc\u03ac\u03b6\u03b1 (\u03ba\u03cc\u03ba\u03ba\u03b9\u03bd\u03b1 \u03c4\u03b5\u03c4\u03c1\u03ac\u03b3\u03c9\u03bd\u03b1), \u03c4\u03bf \u03bc\u03c0\u03bf\u03c5\u03ba\u03ac\u03bb\u03b9 \u03bd\u03b5\u03c1\u03cc (\u03bc\u03c0\u03bb\u03b5 \u03ba\u03cd\u03ba\u03bb\u03bf\u03b9) \u03ba\u03b1\u03b9 \u03c4\u03bf \u03bc\u03c0\u03bf\u03c5\u03ba\u03ac\u03bb\u03b9 \u03c4\u03ad\u03bd\u03b9\u03c2 (\u03ba\u03af\u03c4\u03c1\u03b9\u03bd\u03bf\u03b9 \u03c1\u03cc\u03bc\u03b2\u03bf\u03b9). \u039f\u03b9 \u03b4\u03b9\u03b1\u03ba\u03b5\u03ba\u03bf\u03bc\u03bc\u03ad\u03bd\u03b5\u03c2 \u03b3\u03c1\u03b1\u03bc\u03bc\u03ad\u03c2 \u03b1\u03bd\u03c4\u03b9\u03c3\u03c4\u03bf\u03b9\u03c7\u03bf\u03cd\u03bd \u03c3\u03c4\u03bf \u03bc\u03bf\u03bd\u03c4\u03ad\u03bb\u03bf \u03c0\u03bf\u03c5 \u03c0\u03b5\u03c1\u03b9\u03b3\u03c1\u03ac\u03c6\u03b5\u03c4\u03b1\u03b9 \u03c3\u03c4\u03bf \u039a\u03b5\u03c6. III. \u03a0\u03b1\u03c1\u03ad\u03bd\u03b8\u03b5\u03bc\u03b1: \u03b7 \u03b3\u03c9\u03bd\u03af\u03b1 \u0394\u03b8 =\u03b8 (t) &#8211; \u03b8 (0) \u03ad\u03bd\u03b1\u03bd\u03c4\u03b9 \u03c4\u03bf\u03c5 t, \u03b1\u03c0\u03cc \u03c4\u03b7\u03bd \u03bf\u03c0\u03bf\u03af\u03b1 \u03c0\u03c1\u03bf\u03ad\u03ba\u03c5\u03c8\u03b5 \u03c4\u03bf \u03ba\u03cd\u03c1\u03b9\u03bf \u03c3\u03c7\u03ae\u03bc\u03b1.<\/p><\/div>\n<h3><span style=\"color: #0000ff;\"><strong>\u0393. \u0395\u03c1\u03bc\u03b7\u03bd\u03b5\u03af\u03b1<\/strong><\/span><\/h3>\n<p>\u03a4\u03bf \u03bc\u03c5\u03c3\u03c4\u03b9\u03ba\u03cc \u03c0\u03af\u03c3\u03c9 \u03b1\u03c0\u03cc \u03ad\u03bd\u03b1 \u03b5\u03c0\u03b9\u03c4\u03c5\u03c7\u03b7\u03bc\u03ad\u03bd\u03bf \u03c0\u03ad\u03c4\u03b1\u03b3\u03bc\u03b1 \u03bc\u03b9\u03b1 \u03bc\u03c0\u03bf\u03c4\u03af\u03bb\u03b9\u03b1\u03c2 \u03bc\u03b5 \u03bd\u03b5\u03c1\u03cc &#8211; \u03b7 \u03bc\u03b5\u03b9\u03c9\u03bc\u03ad\u03bd\u03b7 \u03b3\u03c9\u03bd\u03b9\u03b1\u03ba\u03ae \u03c4\u03b1\u03c7\u03cd\u03c4\u03b7\u03c4\u03b1 &#8211; \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03bd\u03b1 \u03b3\u03af\u03bd\u03b5\u03b9 \u03ba\u03b1\u03c4\u03b1\u03bd\u03bf\u03b7\u03c4\u03cc \u03b1\u03c0\u03cc \u03c4\u03b7 \u03b4\u03b9\u03b1\u03c4\u03ae\u03c1\u03b7\u03c3\u03b7 \u03c4\u03b7\u03c2 \u03b3\u03c9\u03bd\u03b9\u03b1\u03ba\u03ae\u03c2 \u03bf\u03c1\u03bc\u03ae\u03c2. \u03a3\u03c4\u03bf \u03c3\u03c5\u03bd\u03b4\u03c5\u03b1\u03c3\u03bc\u03ad\u03bd\u03bf \u03c3\u03cd\u03c3\u03c4\u03b7\u03bc\u03b1 \u03c4\u03b7\u03c2 \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2 \u03ba\u03b1\u03b9 \u03c4\u03bf\u03c5 \u03bd\u03b5\u03c1\u03bf\u03cd \u03b1\u03c3\u03ba\u03b5\u03af\u03c4\u03b1\u03b9 \u03bc\u03cc\u03bd\u03bf \u03b7 \u03b2\u03b1\u03c1\u03cd\u03c4\u03b7\u03c4\u03b1 \u03ba\u03b1\u03b9 \u03b5\u03c0\u03bf\u03bc\u03ad\u03bd\u03c9\u03c2 \u03b4\u03b5\u03bd \u03b2\u03b9\u03ce\u03bd\u03b5\u03b9 \u03ba\u03b1\u03bc\u03af\u03b1 \u03c0\u03c1\u03bf\u03ba\u03cd\u03c0\u03c4\u03bf\u03c5\u03c3\u03b1 \u03c1\u03bf\u03c0\u03ae \u03b3\u03cd\u03c1\u03c9 \u03b1\u03c0\u03cc \u03c4\u03bf \u03ba\u03ad\u03bd\u03c4\u03c1\u03bf \u03c4\u03b7\u03c2 \u03bc\u03ac\u03b6\u03b1\u03c2. \u03a3\u03c5\u03bd\u03b5\u03c0\u03ce\u03c2, \u03b7 \u03c3\u03c5\u03bd\u03bf\u03bb\u03b9\u03ba\u03ae \u03b3\u03c9\u03bd\u03b9\u03b1\u03ba\u03ae \u03bf\u03c1\u03bc\u03ae <span style=\"font-size: 12pt;\">L<\/span> \u03b3\u03cd\u03c1\u03c9 \u03b1\u03c0\u03cc \u03c4\u03bf \u03ba\u03ad\u03bd\u03c4\u03c1\u03bf \u03bc\u03ac\u03b6\u03b1\u03c2 \u03c0\u03c1\u03ad\u03c0\u03b5\u03b9 \u03bd\u03b1 \u03b4\u03b9\u03b1\u03c4\u03b7\u03c1\u03b7\u03b8\u03b5\u03af: <span style=\"font-size: 12pt;\">L = I\u03c9<\/span> \u03b5\u03af\u03bd\u03b1\u03b9 \u03c3\u03c4\u03b1\u03b8\u03b5\u03c1\u03ae, \u03cc\u03c0\u03bf\u03c5 <span style=\"font-size: 12pt;\">I<\/span> \u03b5\u03af\u03bd\u03b1\u03b9 \u03b7 \u03c1\u03bf\u03c0\u03ae \u03b1\u03b4\u03c1\u03ac\u03bd\u03b5\u03b9\u03b1\u03c2 \u03c9\u03c2 \u03c0\u03c1\u03bf\u03c2 \u03ac\u03be\u03bf\u03bd\u03b1 \u03c0\u03bf\u03c5 \u03b4\u03b9\u03ad\u03c1\u03c7\u03b5\u03c4\u03b1\u03b9 \u03b1\u03c0\u03cc \u03c4\u03bf \u03ba\u03ad\u03bd\u03c4\u03c1\u03bf \u03c4\u03b7\u03c2 \u03bc\u03ac\u03b6\u03b1\u03c2. \u0397 \u03c1\u03bf\u03c0\u03ae \u03b1\u03b4\u03c1\u03ac\u03bd\u03b5\u03b9\u03b1\u03c2 \u03b5\u03bd\u03cc\u03c2 \u03ac\u03ba\u03b1\u03bc\u03c0\u03c4\u03bf\u03c5 \u03c3\u03ce\u03bc\u03b1\u03c4\u03bf\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03c3\u03c4\u03b1\u03b8\u03b5\u03c1\u03ae \u03bc\u03b5 \u03c4\u03b7\u03bd \u03c0\u03ac\u03c1\u03bf\u03b4\u03bf \u03c4\u03bf\u03c5 \u03c7\u03c1\u03cc\u03bd\u03bf\u03c5, \u03ad\u03c4\u03c3\u03b9 \u03ce\u03c3\u03c4\u03b5 \u03c4\u03bf \u03c9 \u03c0\u03c1\u03ad\u03c0\u03b5\u03b9 \u03bd\u03b1 \u03c0\u03b1\u03c1\u03b1\u03bc\u03b5\u03af\u03bd\u03b5\u03b9 \u03c3\u03c4\u03b1\u03b8\u03b5\u03c1\u03cc &#8211; \u03c3\u03b5 \u03b1\u03c0\u03cc\u03bb\u03c5\u03c4\u03b7 \u03c3\u03c5\u03bc\u03c6\u03c9\u03bd\u03af\u03b1 \u03bc\u03b5 \u03c4\u03bf \u03c0\u03b5\u03af\u03c1\u03b1\u03bc\u03ac \u03bc\u03b1\u03c2 (\u0395\u03b9\u03ba. 4, \u03ba\u03cc\u03ba\u03ba\u03b9\u03bd\u03b1 \u03c3\u03b7\u03bc\u03ac\u03b4\u03b9\u03b1). \u03a9\u03c3\u03c4\u03cc\u03c3\u03bf, \u03b7 \u03ba\u03b9\u03bd\u03b7\u03c4\u03b9\u03ba\u03cc\u03c4\u03b7\u03c4\u03b1 \u03c4\u03bf\u03c5 \u03c5\u03b3\u03c1\u03bf\u03cd \u03c0\u03c1\u03bf\u03ba\u03b1\u03bb\u03b5\u03af \u03bc\u03b9\u03b1 \u03b1\u03bd\u03b1\u03ba\u03b1\u03c4\u03b1\u03bd\u03bf\u03bc\u03ae \u03c4\u03b7\u03c2 \u03bc\u03ac\u03b6\u03b1\u03c2 \u03bc\u03ad\u03c3\u03b1 \u03c3\u03c4\u03b7 \u03c6\u03b9\u03ac\u03bb\u03b7 \u03ba\u03b1\u03c4\u03ac \u03c4\u03b7 \u03b4\u03b9\u03ac\u03c1\u03ba\u03b5\u03b9\u03b1 \u03c4\u03b7\u03c2 \u03b1\u03bd\u03b1\u03c3\u03c4\u03c1\u03bf\u03c6\u03ae\u03c2, \u03c0\u03c1\u03ac\u03b3\u03bc\u03b1 \u03c0\u03bf\u03c5 \u03c3\u03b7\u03bc\u03b1\u03af\u03bd\u03b5\u03b9 \u03cc\u03c4\u03b9 \u03b7 \u03c1\u03bf\u03c0\u03ae \u03b1\u03b4\u03c1\u03ac\u03bd\u03b5\u03b9\u03b1\u03c2 \u0399 \u03b4\u03b5\u03bd \u03b5\u03af\u03bd\u03b1\u03b9 \u03c0\u03bb\u03ad\u03bf\u03bd \u03c3\u03c4\u03b1\u03b8\u03b5\u03c1\u03ae. \u0391\u03c5\u03c4\u03ae \u03b7 \u03b1\u03bb\u03bb\u03b1\u03b3\u03ae \u03c3\u03c4\u03bf I \u03b5\u03be\u03b7\u03b3\u03b5\u03af \u03c4\u03b7 \u03bc\u03b5\u03af\u03c9\u03c3\u03b7 \u03c4\u03b7\u03c2 \u03b3\u03c9\u03bd\u03b9\u03b1\u03ba\u03ae\u03c2 \u03c4\u03b1\u03c7\u03cd\u03c4\u03b7\u03c4\u03b1\u03c2 \u03c0\u03bf\u03c5 \u03c0\u03b1\u03c1\u03b1\u03c4\u03b7\u03c1\u03b5\u03af\u03c4\u03b1\u03b9 \u03c3\u03c4\u03b7\u03bd \u0395\u03b9\u03ba. 4: \u039a\u03b1\u03b8\u03ce\u03c2 \u03b7 \u03c5\u03b3\u03c1\u03ae \u03bc\u03ac\u03b6\u03b1 \u03b5\u03be\u03b1\u03c0\u03bb\u03ce\u03bd\u03b5\u03c4\u03b1\u03b9, \u03b7 \u03c3\u03c5\u03bd\u03bf\u03bb\u03b9\u03ba\u03ae \u03c1\u03bf\u03c0\u03ae \u03b1\u03b4\u03c1\u03ac\u03bd\u03b5\u03b9\u03b1\u03c2 I \u03b3\u03cd\u03c1\u03c9 \u03b1\u03c0\u03cc \u03c4\u03bf \u03ba\u03ad\u03bd\u03c4\u03c1\u03bf \u03c4\u03b7\u03c2 \u03bc\u03ac\u03b6\u03b1\u03c2 \u03b8\u03b1 \u03b1\u03c5\u03be\u03b7\u03b8\u03b5\u03af, \u03c3\u03c5\u03bd\u03bf\u03b4\u03b5\u03c5\u03cc\u03bc\u03b5\u03bd\u03b7 \u03b1\u03c0\u03cc \u03bc\u03b5\u03af\u03c9\u03c3\u03b7 \u03c4\u03bf\u03c5 \u03c9 \u03b3\u03b9\u03b1 \u03bd\u03b1 \u03b4\u03b9\u03b1\u03c4\u03b7\u03c1\u03b7\u03b8\u03b5\u03af \u03b7 \u03af\u03b4\u03b9\u03b1 \u03c4\u03b9\u03bc\u03ae L = I\u03c9. \u03a4\u03bf \u03af\u03b4\u03b9\u03bf \u03b5\u03c0\u03b9\u03c7\u03b5\u03af\u03c1\u03b7\u03bc\u03b1 \u03b9\u03c3\u03c7\u03cd\u03b5\u03b9 \u03ba\u03b1\u03b9 \u03b3\u03b9\u03b1 \u03c4\u03b9\u03c2 \u03bc\u03c0\u03ac\u03bb\u03b5\u03c2 \u03c4\u03bf\u03c5 \u03c4\u03ad\u03bd\u03b9\u03c2 \u03c0\u03bf\u03c5 &#8220;\u03b5\u03be\u03b1\u03c0\u03bb\u03ce\u03bd\u03bf\u03bd\u03c4\u03b1\u03b9&#8221; \u03ba\u03b1\u03c4\u03ac \u03c4\u03b7 \u03b4\u03b9\u03ac\u03c1\u03ba\u03b5\u03b9\u03b1 \u03c4\u03bf\u03c5 \u03c0\u03b5\u03c4\u03ac\u03b3\u03bc\u03b1\u03c4\u03bf\u03c2, \u03b3\u03b9\u03b1 \u03c4\u03b9\u03c2 \u03bf\u03c0\u03bf\u03af\u03b5\u03c2 \u03c0\u03c1\u03ac\u03b3\u03bc\u03b1\u03c4\u03b9 \u03c0\u03b1\u03c1\u03b1\u03c4\u03b7\u03c1\u03bf\u03cd\u03bc\u03b5 \u03b5\u03c0\u03af\u03c3\u03b7\u03c2 \u03bc\u03b9\u03b1 \u03bc\u03b5\u03af\u03c9\u03c3\u03b7 \u03c3\u03c4\u03bf \u03c9.<\/p>\n<h2><span style=\"color: #0000ff;\"><strong>III. \u039c\u039f\u039d\u03a4\u0395\u039b\u039f<\/strong><\/span><\/h2>\n<p>\u03a0\u03b1\u03c1\u03bf\u03c5\u03c3\u03b9\u03ac\u03b6\u03bf\u03c5\u03bc\u03b5 \u03c4\u03ce\u03c1\u03b1 \u03bc\u03b9\u03b1 \u03c0\u03bf\u03c3\u03bf\u03c4\u03b9\u03ba\u03ae \u03c0\u03b5\u03c1\u03b9\u03b3\u03c1\u03b1\u03c6\u03ae \u03c4\u03c9\u03bd \u03c0\u03b5\u03b9\u03c1\u03b1\u03bc\u03ac\u03c4\u03c9\u03bd, \u03b4\u03b9\u03b1\u03bc\u03bf\u03c1\u03c6\u03ce\u03bd\u03bf\u03bd\u03c4\u03b1\u03c2 \u03ad\u03bd\u03b1 \u03bc\u03bf\u03bd\u03c4\u03ad\u03bb\u03bf \u03bc\u03b5 \u03b1\u03bd\u03b1\u03ba\u03b1\u03c4\u03b1\u03bd\u03bf\u03bc\u03ae \u03c4\u03b7\u03c2 \u03bc\u03ac\u03b6\u03b1\u03c2. \u03a3\u03c5\u03b6\u03b7\u03c4\u03ac\u03bc\u03b5 \u03c0\u03c1\u03ce\u03c4\u03b1 \u03c4\u03b7 \u03c6\u03b9\u03ac\u03bb\u03b7 \u03c4\u03bf\u03c5 \u03c4\u03ad\u03bd\u03b9\u03c2 \u03ba\u03b1\u03b9 \u03c3\u03c4\u03b7 \u03c3\u03c5\u03bd\u03ad\u03c7\u03b5\u03b9\u03b1 \u03c0\u03c1\u03bf\u03c4\u03b5\u03af\u03bd\u03bf\u03c5\u03bc\u03b5 \u03ad\u03bd\u03b1 (\u03c0\u03bf\u03bb\u03cd \u03b1\u03c0\u03bb\u03bf\u03c5\u03c3\u03c4\u03b5\u03c5\u03bc\u03ad\u03bd\u03bf) \u03bc\u03bf\u03bd\u03bf\u03b4\u03b9\u03ac\u03c3\u03c4\u03b1\u03c4\u03bf \u03bc\u03bf\u03bd\u03c4\u03ad\u03bb\u03bf \u03b3\u03b9\u03b1 \u03c4\u03b7\u03bd \u03b5\u03c0\u03af\u03b4\u03c1\u03b1\u03c3\u03b7 \u03c4\u03bf\u03c5 \u03ba\u03b9\u03bd\u03bf\u03cd\u03bc\u03b5\u03bd\u03bf\u03c5 \u03bd\u03b5\u03c1\u03bf\u03cd \u03c3\u03c4\u03bf \u03b5\u03c3\u03c9\u03c4\u03b5\u03c1\u03b9\u03ba\u03cc \u03c4\u03b7\u03c2 \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2. \u039a\u03b1\u03b9 \u03c3\u03c4\u03b9\u03c2 \u03b4\u03cd\u03bf \u03c0\u03b5\u03c1\u03b9\u03c0\u03c4\u03ce\u03c3\u03b5\u03b9\u03c2, \u03c0\u03b1\u03c1\u03ad\u03c7\u03bf\u03c5\u03bc\u03b5 \u03bc\u03b9\u03b1 \u03c0\u03bf\u03c3\u03bf\u03c4\u03b9\u03ba\u03ae \u03c3\u03cd\u03b3\u03ba\u03c1\u03b9\u03c3\u03b7 \u03c3\u03b5 \u03c0\u03b5\u03b9\u03c1\u03ac\u03bc\u03b1\u03c4\u03b1. \u03a4\u03ad\u03bb\u03bf\u03c2, \u03c4\u03bf \u03bc\u03bf\u03bd\u03c4\u03ad\u03bb\u03bf \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03b5\u03af\u03c4\u03b1\u03b9 \u03b3\u03b9\u03b1 \u03bd\u03b1 \u03b1\u03bd\u03c4\u03b9\u03bc\u03b5\u03c4\u03c9\u03c0\u03af\u03c3\u03b5\u03b9 \u03c4\u03bf \u03b6\u03ae\u03c4\u03b7\u03bc\u03b1 \u03c4\u03bf\u03c5 \u03c4\u03b9 \u03ba\u03b1\u03b8\u03bf\u03c1\u03af\u03b6\u03b5\u03b9 \u03c4\u03bf\u03bd \u03b2\u03ad\u03bb\u03c4\u03b9\u03c3\u03c4\u03bf \u03c0\u03b1\u03c1\u03ac\u03b3\u03bf\u03bd\u03c4\u03b1 \u03c0\u03bb\u03ae\u03c1\u03c9\u03c3\u03b7\u03c2 \u03b3\u03b9\u03b1 \u03ad\u03bd\u03b1 \u03b5\u03c0\u03b9\u03c4\u03c5\u03c7\u03b7\u03bc\u03ad\u03bd\u03bf \u03c0\u03ad\u03c4\u03b1\u03b3\u03bc\u03b1 \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2 \u03bd\u03b5\u03c1\u03bf\u03cd.<\/p>\n<h3><span style=\"color: #0000ff;\"><strong>\u0391. \u03a4\u03bf \u03c0\u03ad\u03c4\u03b1\u03b3\u03bc\u03b1 \u03c4\u03b7\u03c2 \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2 \u03c4\u03bf\u03c5 \u03c4\u03ad\u03bd\u03b9<\/strong><\/span>\u03c2<\/h3>\n<p><strong>1. \u039a\u03ad\u03bd\u03c4\u03c1\u03bf \u03bc\u03ac\u03b6\u03b1\u03c2<\/strong><\/p>\n<p>\u039e\u03b5\u03ba\u03b9\u03bd\u03ac\u03bc\u03b5 \u03b5\u03be\u03ac\u03b3\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c4\u03bf\u03bd \u03c4\u03cd\u03c0\u03bf \u03c4\u03bf\u03c5 \u03ba\u03ad\u03bd\u03c4\u03c1\u03bf\u03c5 \u03bc\u03ac\u03b6\u03b1\u03c2, \u03bf \u03bf\u03c0\u03bf\u03af\u03bf\u03c2 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03ae\u03b8\u03b7\u03ba\u03b5 \u03ae\u03b4\u03b7 \u03b3\u03b9\u03b1 \u03c4\u03b7\u03bd \u03b1\u03bd\u03ac\u03bb\u03c5\u03c3\u03b7 \u03c4\u03bf\u03c5 \u03c0\u03b5\u03b9\u03c1\u03ac\u03bc\u03b1\u03c4\u03bf\u03c2. \u0397 \u03b3\u03b5\u03c9\u03bc\u03b5\u03c4\u03c1\u03af\u03b1 \u03c4\u03bf\u03c5 \u03bc\u03c0\u03bf\u03c5\u03ba\u03b1\u03bb\u03b9\u03bf\u03cd \u03c4\u03bf\u03c5 \u03c4\u03ad\u03bd\u03b9\u03c2 \u03c3\u03ba\u03b9\u03b1\u03b3\u03c1\u03b1\u03c6\u03b5\u03af\u03c4\u03b1\u03b9 \u03c3\u03c4\u03b7\u03bd <a href=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2018\/09\/Bottle-2.jpg\" target=\"_blank\" rel=\"noopener\">\u0395\u03b9\u03ba. 2<\/a>.<br \/>\n\u0397 \u03c6\u03b9\u03ac\u03bb\u03b7 \u03b5\u03af\u03bd\u03b1\u03b9 \u03bf\u03c5\u03c3\u03b9\u03b1\u03c3\u03c4\u03b9\u03ba\u03ac \u03ad\u03bd\u03b1\u03c2 \u03ba\u03bf\u03af\u03bb\u03bf\u03c2 \u03ba\u03cd\u03bb\u03b9\u03bd\u03b4\u03c1\u03bf\u03c2 \u03b1\u03ba\u03c4\u03af\u03bd\u03b1\u03c2 R, \u03cd\u03c8\u03bf\u03c5\u03c2 \u0397 \u03ba\u03b1\u03b9 \u03bc\u03ac\u03b6\u03b1\u03c2 <span style=\"font-size: 12pt;\">m<sub>b<\/sub><\/span>. \u03a5\u03c0\u03bf\u03b8\u03ad\u03c4\u03bf\u03bd\u03c4\u03b1\u03c2 \u03cc\u03c4\u03b9 \u03bf \u03ba\u03cd\u03bb\u03b9\u03bd\u03b4\u03c1\u03bf\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03c3\u03c5\u03bc\u03bc\u03b5\u03c4\u03c1\u03b9\u03ba\u03cc\u03c2 \u03b1\u03c0\u03cc \u03c0\u03ac\u03bd\u03c9 \u03c9\u03c2 \u03ba\u03ac\u03c4\u03c9, \u03c4\u03bf \u03ba\u03ad\u03bd\u03c4\u03c1\u03bf \u03c4\u03b7\u03c2 \u03bc\u03ac\u03b6\u03b1\u03c2 \u03c4\u03bf\u03c5 \u03b2\u03c1\u03af\u03c3\u03ba\u03b5\u03c4\u03b1\u03b9 \u03c3\u03b5 \u03b8\u03ad\u03c3\u03b7 <span style=\"font-size: 12pt;\">H \/ 2<\/span>. \u039f\u03b9 \u03bc\u03c0\u03ac\u03bb\u03b5\u03c2 \u03c4\u03bf\u03c5 \u03c4\u03ad\u03bd\u03b9\u03c2 \u03c0\u03b1\u03c1\u03bf\u03c5\u03c3\u03b9\u03ac\u03b6\u03bf\u03bd\u03c4\u03b1\u03b9 \u03c9\u03c2 \u03ba\u03bf\u03af\u03bb\u03b5\u03c2 \u03c3\u03c6\u03b1\u03af\u03c1\u03b5\u03c2 \u03b1\u03ba\u03c4\u03af\u03bd\u03b1\u03c2 R \u03ba\u03b1\u03b9 \u03bc\u03ac\u03b6\u03b1 <span style=\"font-size: 12pt;\">m<sub>t<\/sub><\/span>. \u0397 \u03ba\u03b1\u03c4\u03ce\u03c4\u03b5\u03c1\u03b7 \u03c3\u03c6\u03b1\u03af\u03c1\u03b1 \u03c0\u03b1\u03c1\u03b1\u03bc\u03ad\u03bd\u03b5\u03b9 \u03c3\u03c4\u03bf\u03bd \u03c0\u03c5\u03b8\u03bc\u03ad\u03bd\u03b1 \u03c4\u03bf\u03c5 \u03ba\u03c5\u03bb\u03af\u03bd\u03b4\u03c1\u03bf\u03c5 \u03b5\u03bd\u03ce \u03b7 \u03ba\u03bf\u03c1\u03c5\u03c6\u03ae \u03c4\u03b7\u03c2 \u03ac\u03bd\u03c9 \u03c3\u03c6\u03b1\u03af\u03c1\u03b1\u03c2 \u03b2\u03c1\u03af\u03c3\u03ba\u03b5\u03c4\u03b1\u03b9 \u03c3\u03b5 \u03b8\u03ad\u03c3\u03b7 h \u03c0\u03bf\u03c5 \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03bd\u03b1 \u03b1\u03bb\u03bb\u03ac\u03be\u03b5\u03b9 \u03ba\u03b1\u03c4\u03ac \u03c4\u03b7 \u03b4\u03b9\u03ac\u03c1\u03ba\u03b5\u03b9\u03b1 \u03c4\u03bf\u03c5 \u03c0\u03b5\u03b9\u03c1\u03ac\u03bc\u03b1\u03c4\u03bf\u03c2. \u0388\u03c4\u03c3\u03b9, \u03c4\u03bf \u03ba\u03ad\u03bd\u03c4\u03c1\u03bf \u03c4\u03b7\u03c2 \u03bc\u03ac\u03b6\u03b1\u03c2 \u03c4\u03c9\u03bd \u03b4\u03cd\u03bf \u03c3\u03c6\u03b1\u03b9\u03c1\u03ce\u03bd \u03b2\u03c1\u03af\u03c3\u03ba\u03b5\u03c4\u03b1\u03b9 \u03c3\u03c4\u03bf <span style=\"font-size: 12pt;\">h \/ 2<\/span>.<br \/>\n\u03a4\u03bf \u03c3\u03c5\u03bd\u03bf\u03bb\u03b9\u03ba\u03cc \u03ba\u03ad\u03bd\u03c4\u03c1\u03bf \u03bc\u03ac\u03b6\u03b1\u03c2 \u03c4\u03b7\u03c2 \u03c3\u03c5\u03bd\u03b4\u03c5\u03b1\u03c3\u03bc\u03ad\u03bd\u03bf\u03c5 \u03c3\u03c5\u03c3\u03c4\u03ae\u03bc\u03b1\u03c4\u03bf\u03c2 \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2 \u03ba\u03b1\u03b9 \u03bc\u03c0\u03b1\u03bb\u03ce\u03bd \u03bb\u03b1\u03bc\u03b2\u03ac\u03bd\u03b5\u03c4\u03b1\u03b9 \u03bc\u03b5 \u03c3\u03c4\u03b1\u03b8\u03bc\u03b9\u03c3\u03bc\u03ad\u03bd\u03bf \u03bc\u03ad\u03c3\u03bf \u03cc\u03c1\u03bf \u03c4\u03c9\u03bd \u03b1\u03bd\u03c4\u03af\u03c3\u03c4\u03bf\u03b9\u03c7\u03c9\u03bd \u03ba\u03ad\u03bd\u03c4\u03c1\u03c9\u03bd \u03bc\u03ac\u03b6\u03b1\u03c2. \u0395\u03c0\u03bf\u03bc\u03ad\u03bd\u03c9\u03c2, \u03ba\u03ac\u03c0\u03bf\u03b9\u03bf\u03c2 \u03b5\u03c0\u03b1\u03bb\u03b7\u03b8\u03b5\u03cd\u03b5\u03b9 \u03cc\u03c4\u03b9 \u03b7 \u03b8\u03ad\u03c3\u03b7 \u03c4\u03bf\u03c5 \u03c3\u03c5\u03bd\u03b4\u03c5\u03b1\u03c3\u03bc\u03ad\u03bd\u03bf\u03c5 \u03ba\u03ad\u03bd\u03c4\u03c1\u03bf\u03c5 \u03bc\u03ac\u03b6\u03b1\u03c2 <span style=\"font-size: 12pt;\">h<sub>CM<\/sub><\/span> \u03b2\u03c1\u03af\u03c3\u03ba\u03b5\u03c4\u03b1\u03b9 \u03c3\u03c4\u03bf\u00a0<\/p>\n<p><a name=\"id3505815586\"><\/a><\/p>\n<p class=\"ql-center-displayed-equation\" style=\"line-height: 54px;\"><span class=\"ql-right-eqno\"> (1) <\/span><span class=\"ql-left-eqno\"> &nbsp; <\/span><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/viewonphysics.gr\/wp-content\/ql-cache\/quicklatex.com-df632c4b0b03a820dd6f1c0ff2c30524_l3.png\" height=\"54\" width=\"331\" class=\"ql-img-displayed-equation quicklatex-auto-format\" alt=\"&#92;&#98;&#101;&#103;&#105;&#110;&#123;&#101;&#113;&#117;&#97;&#116;&#105;&#111;&#110;&#42;&#125;&#32;&#32; &#104;&#95;&#123;&#67;&#77;&#125;&#61;&#92;&#102;&#114;&#97;&#99;&#123;&#109;&#95;&#98;&#32;&#92;&#102;&#114;&#97;&#99;&#123;&#72;&#125;&#123;&#50;&#125;&#43;&#50;&#109;&#95;&#116;&#32;&#92;&#102;&#114;&#97;&#99;&#123;&#104;&#125;&#123;&#50;&#125;&#125;&#123;&#109;&#95;&#98;&#43;&#50;&#109;&#95;&#116;&#125;&#61;&#92;&#102;&#114;&#97;&#99;&#123;&#72;&#125;&#123;&#50;&#125;&#32;&#92;&#108;&#101;&#102;&#116;&#32;&#40;&#32;&#92;&#102;&#114;&#97;&#99;&#123;&#109;&#95;&#98;&#43;&#50;&#109;&#95;&#116;&#32;&#92;&#102;&#114;&#97;&#99;&#123;&#104;&#125;&#123;&#72;&#125;&#125;&#123;&#109;&#95;&#98;&#43;&#50;&#109;&#95;&#116;&#125;&#32;&#92;&#114;&#105;&#103;&#104;&#116;&#32;&#41; &#92;&#101;&#110;&#100;&#123;&#101;&#113;&#117;&#97;&#116;&#105;&#111;&#110;&#42;&#125;\" title=\"Rendered by QuickLaTeX.com\"\/><\/p>\n<p>\u03a3\u03b1\u03c6\u03ce\u03c2, \u03c4\u03bf <span style=\"font-size: 12pt;\">h<sub>CM<\/sub><\/span> \u03bc\u03b5\u03c4\u03b1\u03b2\u03ac\u03bb\u03bb\u03b5\u03c4\u03b1\u03b9 \u03ba\u03b1\u03c4\u03ac \u03c4\u03b7 \u03b4\u03b9\u03ac\u03c1\u03ba\u03b5\u03b9\u03b1 \u03c4\u03bf\u03c5 \u03c0\u03b5\u03b9\u03c1\u03ac\u03bc\u03b1\u03c4\u03bf\u03c2, \u03ba\u03b1\u03b8\u03ce\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03c3\u03c5\u03bd\u03ac\u03c1\u03c4\u03b7\u03c3\u03b7 \u03c4\u03b7\u03c2 \u03b8\u03ad\u03c3\u03b7\u03c2 \u03c4\u03bf\u03c5 <span style=\"font-size: 12pt;\">h<\/span> \u03c4\u03b7\u03c2 \u03b4\u03b5\u03cd\u03c4\u03b5\u03c1\u03b7\u03c2 \u03bc\u03c0\u03ac\u03bb\u03b1\u03c2.<\/p>\n<p><strong>2. \u03a1\u03bf\u03c0\u03ae \u03b1\u03b4\u03c1\u03ac\u03bd\u03b5\u03b9\u03b1\u03c2<\/strong><\/p>\n<p>\u03a4\u03bf \u03b5\u03c0\u03cc\u03bc\u03b5\u03bd\u03bf \u03b2\u03ae\u03bc\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 \u03bd\u03b1 \u03c0\u03c1\u03bf\u03c3\u03b4\u03b9\u03bf\u03c1\u03b9\u03c3\u03c4\u03b5\u03af \u03b7 \u03c1\u03bf\u03c0\u03ae \u03b1\u03b4\u03c1\u03ac\u03bd\u03b5\u03b9\u03b1\u03c2 \u0399 \u03c4\u03bf\u03c5 \u03c3\u03c5\u03bd\u03b4\u03c5\u03b1\u03c3\u03bc\u03ad\u03bd\u03bf\u03c5 \u03c3\u03c5\u03c3\u03c4\u03ae\u03bc\u03b1\u03c4\u03bf\u03c2. \u0394\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03bf\u03c5 \u03cc\u03c4\u03b9 \u03b7 \u03b3\u03c9\u03bd\u03b9\u03b1\u03ba\u03ae \u03bf\u03c1\u03bc\u03ae \u03b4\u03b9\u03b1\u03c4\u03b7\u03c1\u03b5\u03af\u03c4\u03b1\u03b9 \u03bc\u03cc\u03bd\u03bf \u03b3\u03cd\u03c1\u03c9 \u03b1\u03c0\u03cc \u03c4\u03bf \u03ba\u03ad\u03bd\u03c4\u03c1\u03bf \u03c4\u03b7\u03c2 \u03bc\u03ac\u03b6\u03b1\u03c2, \u03c0\u03c1\u03ad\u03c0\u03b5\u03b9 \u03b5\u03c0\u03af\u03c3\u03b7\u03c2 \u03bd\u03b1 \u03c0\u03c1\u03bf\u03c3\u03b4\u03b9\u03bf\u03c1\u03af\u03c3\u03bf\u03c5\u03bc\u03b5 \u03c4\u03bf I \u03c9\u03c2 \u03c0\u03c1\u03bf\u03c2 \u03ac\u03be\u03bf\u03bd\u03b1 \u03bc\u03ad\u03c3\u03c9 \u03c4\u03bf\u03c5 \u03ba\u03ad\u03bd\u03c4\u03c1\u03bf\u03c5 \u03bc\u03ac\u03b6\u03b1\u03c2.<\/p>\n<p>\u0391\u03c2 \u03b5\u03be\u03b5\u03c4\u03ac\u03c3\u03bf\u03c5\u03bc\u03b5 \u03c0\u03c1\u03ce\u03c4\u03b1 \u03c4\u03bf \u03bc\u03c0\u03bf\u03c5\u03ba\u03ac\u03bb\u03b9. \u03a5\u03c0\u03bf\u03b8\u03ad\u03c4\u03bf\u03c5\u03bc\u03b5 \u03cc\u03c4\u03b9 \u03b7 \u03bc\u03ac\u03b6\u03b1 \u03c4\u03bf\u03c5 \u03bc\u03c0\u03bf\u03c5\u03ba\u03b1\u03bb\u03b9\u03bf\u03cd \u03b5\u03af\u03bd\u03b1\u03b9 \u03c4\u03ad\u03bb\u03b5\u03b9\u03b1 \u03b5\u03bd\u03c4\u03bf\u03c0\u03b9\u03c3\u03bc\u03ad\u03bd\u03b7 \u03c3\u03b5 \u03ad\u03bd\u03b1 \u03c0\u03bf\u03bb\u03cd \u03bb\u03b5\u03c0\u03c4\u03cc \u03c4\u03bf\u03af\u03c7\u03c9\u03bc\u03b1 \u03c3\u03c4\u03bf \u03b5\u03be\u03c9\u03c4\u03b5\u03c1\u03b9\u03ba\u03cc \u03c4\u03bf\u03c5 \u03ba\u03c5\u03bb\u03af\u03bd\u03b4\u03c1\u03bf\u03c5 (\u03b5\u03be \u03bf\u03c5 \u03ba\u03b1\u03b9 \u03b1\u03b3\u03bd\u03bf\u03bf\u03cd\u03bc\u03b5 \u03c4\u03b7 \u03bc\u03ac\u03b6\u03b1 \u03c3\u03c4\u03bf \u03c0\u03ac\u03bd\u03c9 \u03ba\u03b1\u03b9 \u03c3\u03c4\u03bf \u03ba\u03ac\u03c4\u03c9 \u03bc\u03ad\u03c1\u03bf\u03c2 \u03c4\u03bf\u03c5 \u03ba\u03c5\u03bb\u03af\u03bd\u03b4\u03c1\u03bf\u03c5). \u039c\u03b5 \u03b1\u03c5\u03c4\u03cc, \u03bc\u03c0\u03bf\u03c1\u03bf\u03cd\u03bc\u03b5 \u03bd\u03b1 \u03ba\u03b1\u03b8\u03bf\u03c1\u03af\u03c3\u03bf\u03c5\u03bc\u03b5 \u03c4\u03b7 \u03c1\u03bf\u03c0\u03ae \u03b1\u03b4\u03c1\u03ac\u03bd\u03b5\u03b9\u03b1\u03c2 \u03c3\u03b5 \u03b4\u03cd\u03bf \u03b2\u03ae\u03bc\u03b1\u03c4\u03b1. \u03a0\u03c1\u03ce\u03c4\u03bf\u03bd, \u03b8\u03b5\u03c9\u03c1\u03bf\u03cd\u03bc\u03b5 \u03c4\u03b7 \u03c1\u03bf\u03c0\u03ae \u03b1\u03b4\u03c1\u03ac\u03bd\u03b5\u03b9\u03b1\u03c2 \u03c4\u03b7\u03c2 \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2 \u03c3\u03b5 \u03c3\u03c7\u03ad\u03c3\u03b7 \u03bc\u03b5 \u03c4\u03bf \u03ba\u03ad\u03bd\u03c4\u03c1\u03bf \u03bc\u03ac\u03b6\u03b1\u03c2 \u03c4\u03b7\u03c2 \u03c0\u03bf\u03c5 \u03b2\u03c1\u03af\u03c3\u03ba\u03b5\u03c4\u03b1\u03b9 \u03c3\u03c4\u03bf <span style=\"font-size: 12pt;\">H \/ 2<\/span>, \u03c9\u03c2 \u03c0\u03c1\u03bf\u03c2 \u03c4\u03bf\u03bd \u03ac\u03be\u03bf\u03bd\u03b1 \u03c0\u03bf\u03c5 \u03c5\u03c0\u03bf\u03b4\u03b5\u03b9\u03ba\u03bd\u03cd\u03b5\u03c4\u03b1\u03b9 \u03c3\u03c4\u03b7\u03bd <a href=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2018\/09\/Bottle-2.jpg\" target=\"_blank\" rel=\"noopener\">\u0395\u03b9\u03ba. 2<\/a>. \u0391\u03c5\u03c4\u03cc\u03c2 \u03bf \u03ac\u03be\u03bf\u03bd\u03b1\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03ba\u03ac\u03b8\u03b5\u03c4\u03bf\u03c2 \u03c3\u03c4\u03bf\u03bd \u03ac\u03be\u03bf\u03bd\u03b1 \u03c3\u03c5\u03bc\u03bc\u03b5\u03c4\u03c1\u03af\u03b1\u03c2 \u03c4\u03bf\u03c5 \u03ba\u03c5\u03bb\u03af\u03bd\u03b4\u03c1\u03bf\u03c5 \u03ba\u03b1\u03b9 \u03b7 \u03b1\u03bd\u03c4\u03af\u03c3\u03c4\u03bf\u03b9\u03c7\u03b7 \u03c1\u03bf\u03c0\u03ae \u03b1\u03b4\u03c1\u03ac\u03bd\u03b5\u03b9\u03b1\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9:<\/p>\n<p><a name=\"id3693702910\"><\/a><\/p>\n<p class=\"ql-center-displayed-equation\" style=\"line-height: 33px;\"><span class=\"ql-right-eqno\"> (2) <\/span><span class=\"ql-left-eqno\"> &nbsp; <\/span><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/viewonphysics.gr\/wp-content\/ql-cache\/quicklatex.com-18f7c976756735548cb04feb0f0082f1_l3.png\" height=\"33\" width=\"153\" class=\"ql-img-displayed-equation quicklatex-auto-format\" alt=\"&#92;&#98;&#101;&#103;&#105;&#110;&#123;&#101;&#113;&#117;&#97;&#116;&#105;&#111;&#110;&#42;&#125;&#32;&#32; &#73;&#39;&#95;&#98;&#61;&#92;&#102;&#114;&#97;&#99;&#123;&#109;&#95;&#98;&#125;&#123;&#49;&#50;&#125;&#32;&#40;&#54;&#82;&#94;&#50;&#43;&#72;&#94;&#50;&#41; &#92;&#101;&#110;&#100;&#123;&#101;&#113;&#117;&#97;&#116;&#105;&#111;&#110;&#42;&#125;\" title=\"Rendered by QuickLaTeX.com\"\/><\/p>\n<p>\u03a9\u03c3\u03c4\u03cc\u03c3\u03bf, \u03b7 \u03c0\u03b5\u03c1\u03b9\u03c3\u03c4\u03c1\u03bf\u03c6\u03ae \u03bb\u03b1\u03bc\u03b2\u03ac\u03bd\u03b5\u03b9 \u03c7\u03ce\u03c1\u03b1 \u03b3\u03cd\u03c1\u03c9 \u03b1\u03c0\u03cc \u03c4\u03bf \u03ba\u03ad\u03bd\u03c4\u03c1\u03bf \u03bc\u03ac\u03b6\u03b1\u03c2 <span style=\"font-size: 12pt;\">h<sub>CM<\/sub><\/span> \u03c4\u03bf\u03c5 \u03c3\u03c5\u03bd\u03bf\u03bb\u03b9\u03ba\u03bf\u03cd \u03c3\u03c5\u03c3\u03c4\u03ae\u03bc\u03b1\u03c4\u03bf\u03c2, \u03c0\u03bf\u03c5 \u03bf\u03c1\u03af\u03b6\u03b5\u03c4\u03b1\u03b9 \u03b1\u03c0\u03cc \u03c4\u03b7\u03bd \u03b5\u03be\u03af\u03c3\u03c9\u03c3\u03b7 (<a href=\"#id3505815586\">1<\/a>). \u03a9\u03c2 \u03b5\u03ba \u03c4\u03bf\u03cd\u03c4\u03bf\u03c5, \u03bf \u03ac\u03be\u03bf\u03bd\u03b1\u03c2 \u03c0\u03b5\u03c1\u03b9\u03c3\u03c4\u03c1\u03bf\u03c6\u03ae\u03c2 \u03c3\u03c4\u03bf \u03c0\u03b5\u03af\u03c1\u03b1\u03bc\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 \u03c0\u03b1\u03c1\u03ac\u03bb\u03bb\u03b7\u03bb\u03bf\u03c2 \u03c0\u03c1\u03bf\u03c2 \u03c4\u03bf\u03bd \u03ac\u03be\u03bf\u03bd\u03b1 \u03c0\u03bf\u03c5 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03b5\u03af\u03c4\u03b1\u03b9 \u03b3\u03b9\u03b1 \u03c4\u03b7\u03bd \u03b5\u03be\u03af\u03c3\u03c9\u03c3\u03b7 (<a href=\"#id3693702910\">2<\/a>), \u03b1\u03bb\u03bb\u03ac \u03bc\u03b5\u03c4\u03b1\u03c4\u03bf\u03c0\u03af\u03b6\u03b5\u03c4\u03b1\u03b9 \u03b1\u03c0\u03cc \u03bc\u03b9\u03b1 \u03b1\u03c0\u03cc\u03c3\u03c4\u03b1\u03c3\u03b7 <span style=\"font-size: 12pt;\">(H \/ 2) -h<sub>CM<\/sub><\/span>. \u03a3\u03c4\u03b7 \u03c3\u03c5\u03bd\u03ad\u03c7\u03b5\u03b9\u03b1 \u03bb\u03b1\u03bc\u03b2\u03ac\u03bd\u03b5\u03c4\u03b1\u03b9 \u03b7 \u03c3\u03c7\u03b5\u03c4\u03b9\u03ba\u03ae \u03c1\u03bf\u03c0\u03ae \u03b1\u03b4\u03c1\u03ac\u03bd\u03b5\u03b9\u03b1\u03c2 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03ce\u03bd\u03c4\u03b1\u03c2 \u03c4\u03bf<em> \u03b8\u03b5\u03ce\u03c1\u03b7\u03bc\u03b1 \u03c4\u03bf\u03c5 \u03c0\u03b1\u03c1\u03ac\u03bb\u03bb\u03b7\u03bb\u03bf\u03c5 \u03ac\u03be\u03bf\u03bd\u03b1<\/em>. \u0391\u03c5\u03c4\u03cc \u03b4\u03af\u03bd\u03b5\u03b9:<\/p>\n<p><a name=\"id2575662746\"><\/a><\/p>\n<p class=\"ql-center-displayed-equation\" style=\"line-height: 80px;\"><span class=\"ql-right-eqno\"> (3) <\/span><span class=\"ql-left-eqno\"> &nbsp; <\/span><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/viewonphysics.gr\/wp-content\/ql-cache\/quicklatex.com-5f1ca99e5596401450514121a8d58fee_l3.png\" height=\"80\" width=\"291\" class=\"ql-img-displayed-equation quicklatex-auto-format\" alt=\"&#92;&#98;&#101;&#103;&#105;&#110;&#123;&#101;&#113;&#117;&#97;&#116;&#105;&#111;&#110;&#42;&#125;&#32;&#32; &#92;&#98;&#101;&#103;&#105;&#110;&#123;&#115;&#112;&#108;&#105;&#116;&#125; &#73;&#95;&#98;&#61;&#38;&#32;&#73;&#39;&#95;&#98;&#43;&#109;&#95;&#98;&#32;&#40;&#92;&#102;&#114;&#97;&#99;&#123;&#72;&#125;&#123;&#50;&#125;&#45;&#104;&#95;&#123;&#67;&#77;&#125;&#41;&#94;&#50;&#32;&#92;&#92; &#61;&#38;&#32;&#92;&#102;&#114;&#97;&#99;&#123;&#109;&#95;&#98;&#125;&#123;&#49;&#50;&#125;&#32;&#40;&#54;&#82;&#94;&#50;&#43;&#72;&#94;&#50;&#41;&#43;&#109;&#95;&#98;&#32;&#40;&#92;&#102;&#114;&#97;&#99;&#123;&#72;&#125;&#123;&#50;&#125;&#45;&#104;&#95;&#123;&#67;&#77;&#125;&#41;&#94;&#50; &#92;&#101;&#110;&#100;&#123;&#115;&#112;&#108;&#105;&#116;&#125; &#92;&#101;&#110;&#100;&#123;&#101;&#113;&#117;&#97;&#116;&#105;&#111;&#110;&#42;&#125;\" title=\"Rendered by QuickLaTeX.com\"\/><\/p>\n<p>\u039c\u03b5 \u03c0\u03b1\u03c1\u03cc\u03bc\u03bf\u03b9\u03bf \u03c4\u03c1\u03cc\u03c0\u03bf, \u03b1\u03c0\u03bf\u03ba\u03c4\u03ac \u03ba\u03b1\u03bd\u03b5\u03af\u03c2 \u03c4\u03b7 \u03c1\u03bf\u03c0\u03ae \u03b1\u03b4\u03c1\u03ac\u03bd\u03b5\u03b9\u03b1\u03c2 \u03c4\u03c9\u03bd \u03b4\u03cd\u03bf \u03bc\u03c0\u03b1\u03bb\u03ce\u03bd \u03c4\u03bf\u03c5 \u03c4\u03ad\u03bd\u03b9\u03c2. \u0398\u03b5\u03c9\u03c1\u03ce\u03bd\u03c4\u03b1\u03c2 \u03c4\u03b9\u03c2 \u03c3\u03c6\u03b1\u03af\u03c1\u03b5\u03c2 \u03c9\u03c2 \u03ba\u03bf\u03af\u03bb\u03b5\u03c2 \u03c3\u03c6\u03b1\u03af\u03c1\u03b5\u03c2 \u03bc\u03b5 \u03bb\u03b5\u03c0\u03c4\u03ac \u03c4\u03bf\u03b9\u03c7\u03ce\u03bc\u03b1\u03c4\u03b1, \u03c0\u03b1\u03af\u03c1\u03bd\u03bf\u03c5\u03bc\u03b5:<\/p>\n<p><a name=\"id1399364746\"><\/a><\/p>\n<p class=\"ql-center-displayed-equation\" style=\"line-height: 36px;\"><span class=\"ql-right-eqno\"> (4) <\/span><span class=\"ql-left-eqno\"> &nbsp; <\/span><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/viewonphysics.gr\/wp-content\/ql-cache\/quicklatex.com-d7c2971419644d5228a3c2c1c98f0c6f_l3.png\" height=\"36\" width=\"235\" class=\"ql-img-displayed-equation quicklatex-auto-format\" alt=\"&#92;&#98;&#101;&#103;&#105;&#110;&#123;&#101;&#113;&#117;&#97;&#116;&#105;&#111;&#110;&#42;&#125;&#32;&#32; &#73;&#95;&#49;&#61;&#92;&#102;&#114;&#97;&#99;&#123;&#50;&#125;&#123;&#51;&#125;&#109;&#95;&#116;&#82;&#94;&#50;&#43;&#109;&#95;&#116;&#40;&#82;&#45;&#104;&#95;&#123;&#67;&#77;&#125;&#41;&#94;&#50;&#44; &#92;&#101;&#110;&#100;&#123;&#101;&#113;&#117;&#97;&#116;&#105;&#111;&#110;&#42;&#125;\" title=\"Rendered by QuickLaTeX.com\"\/><\/p>\n<p><a name=\"id2337322803\"><\/a><\/p>\n<p class=\"ql-center-displayed-equation\" style=\"line-height: 36px;\"><span class=\"ql-right-eqno\"> (5) <\/span><span class=\"ql-left-eqno\"> &nbsp; <\/span><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/viewonphysics.gr\/wp-content\/ql-cache\/quicklatex.com-6106614dd1b06a97e0fa4c3b287a9b91_l3.png\" height=\"36\" width=\"261\" class=\"ql-img-displayed-equation quicklatex-auto-format\" alt=\"&#92;&#98;&#101;&#103;&#105;&#110;&#123;&#101;&#113;&#117;&#97;&#116;&#105;&#111;&#110;&#42;&#125;&#32;&#32; &#73;&#95;&#50;&#61;&#92;&#102;&#114;&#97;&#99;&#123;&#50;&#125;&#123;&#51;&#125;&#109;&#95;&#116;&#82;&#94;&#50;&#43;&#109;&#95;&#116;&#40;&#104;&#45;&#82;&#45;&#104;&#95;&#123;&#67;&#77;&#125;&#41;&#94;&#50; &#92;&#101;&#110;&#100;&#123;&#101;&#113;&#117;&#97;&#116;&#105;&#111;&#110;&#42;&#125;\" title=\"Rendered by QuickLaTeX.com\"\/><\/p>\n<p>\u039f\u03b9 \u03c0\u03c1\u03ce\u03c4\u03bf\u03b9 \u03cc\u03c1\u03bf\u03b9 \u03c3\u03c4\u03b7 \u03b4\u03b5\u03be\u03b9\u03ac \u03c0\u03bb\u03b5\u03c5\u03c1\u03ac \u03b5\u03af\u03bd\u03b1\u03b9 \u03b7 \u03c1\u03bf\u03c0\u03ae \u03b1\u03b4\u03c1\u03ac\u03bd\u03b5\u03b9\u03b1\u03c2 \u03c4\u03b7\u03c2 \u03c3\u03c6\u03b1\u03af\u03c1\u03b1\u03c2 \u03c9\u03c2 \u03c0\u03c1\u03bf\u03c2 \u03c4\u03bf \u03ba\u03ad\u03bd\u03c4\u03c1\u03bf \u03bc\u03ac\u03b6\u03b1\u03c2, \u03b5\u03bd\u03ce \u03bf\u03b9 \u03b4\u03b5\u03cd\u03c4\u03b5\u03c1\u03bf\u03b9 \u03cc\u03c1\u03bf\u03b9 \u03b1\u03c6\u03bf\u03c1\u03bf\u03cd\u03bd \u03c3\u03c4\u03b7\u03bd \u03c0\u03b1\u03c1\u03ac\u03bb\u03bb\u03b7\u03bb\u03b7 \u03bc\u03b5\u03c4\u03b1\u03c4\u03cc\u03c0\u03b9\u03c3\u03b7 \u03c0\u03c1\u03bf\u03c2 \u03c4\u03bf <span style=\"font-size: 12pt;\">h<sub>CM<\/sub><\/span> \u03c4\u03bf\u03c5 \u03c3\u03c5\u03bd\u03bf\u03bb\u03b9\u03ba\u03bf\u03cd \u03c3\u03c5\u03c3\u03c4\u03ae\u03bc\u03b1\u03c4\u03bf\u03c2.<\/p>\n<p>\u03a4\u03ad\u03bb\u03bf\u03c2, \u03b7 \u03c3\u03c5\u03bd\u03bf\u03bb\u03b9\u03ba\u03ae \u03c1\u03bf\u03c0\u03ae \u03b1\u03b4\u03c1\u03ac\u03bd\u03b5\u03b9\u03b1\u03c2 \u03ba\u03b1\u03c4\u03ac \u03c4\u03b7 \u03b4\u03b9\u03ac\u03c1\u03ba\u03b5\u03b9\u03b1 \u03c4o\u03c5 \u03c0\u03b5\u03c4\u03ac\u03b3\u03bc\u03b1\u03c4\u03bf\u03c2 \u03c4\u03b7\u03c2 \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2 \u03c4\u03bf\u03c5 \u03c4\u03ad\u03bd\u03b9\u03c2 \u03b3\u03c1\u03ac\u03c6\u03b5\u03c4\u03b1\u03b9:<\/p>\n<p><a name=\"id902837062\"><\/a><\/p>\n<p class=\"ql-center-displayed-equation\" style=\"line-height: 18px;\"><span class=\"ql-right-eqno\"> (6) <\/span><span class=\"ql-left-eqno\"> &nbsp; <\/span><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/viewonphysics.gr\/wp-content\/ql-cache\/quicklatex.com-05f5c04eeadddb130c17e168b436d947_l3.png\" height=\"18\" width=\"145\" class=\"ql-img-displayed-equation quicklatex-auto-format\" alt=\"&#92;&#98;&#101;&#103;&#105;&#110;&#123;&#101;&#113;&#117;&#97;&#116;&#105;&#111;&#110;&#42;&#125;&#32;&#32; &#73;&#40;&#104;&#41;&#61;&#73;&#95;&#98;&#43;&#73;&#95;&#49;&#43;&#73;&#95;&#50; &#92;&#101;&#110;&#100;&#123;&#101;&#113;&#117;&#97;&#116;&#105;&#111;&#110;&#42;&#125;\" title=\"Rendered by QuickLaTeX.com\"\/><\/p>\n<p>\u039a\u03ac\u03b8\u03b5 \u03ad\u03bd\u03b1\u03c2 \u03b1\u03c0\u03cc \u03b1\u03c5\u03c4\u03bf\u03cd\u03c2 \u03c4\u03bf\u03c5\u03c2 \u03cc\u03c1\u03bf\u03c5\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03c3\u03c5\u03bd\u03ac\u03c1\u03c4\u03b7\u03c3\u03b7 \u03c4\u03bf\u03c5 h, \u03bb\u03cc\u03b3\u03c9 \u03c4\u03b7\u03c2 \u03b5\u03be\u03ac\u03c1\u03c4\u03b7\u03c3\u03b7\u03c2 \u03c4\u03bf\u03c5 <span style=\"font-size: 12pt;\">h<sub>CM<\/sub><\/span> \u03b1\u03c0\u03cc \u03c4\u03b7 \u03b8\u03ad\u03c3\u03b7 <span style=\"font-size: 12pt;\">h<\/span> \u03c4\u03b7\u03c2 \u03b4\u03b5\u03cd\u03c4\u03b5\u03c1\u03b7\u03c2 \u03bc\u03c0\u03ac\u03bb\u03b1\u03c2.<\/p>\n<p><strong>3. \u03a3\u03cd\u03b3\u03ba\u03c1\u03b9\u03c3\u03b7 \u03bc\u03b5 \u03c0\u03b5\u03b9\u03c1\u03ac\u03bc\u03b1\u03c4\u03b1<\/strong><\/p>\n<p>\u0393\u03b9\u03b1 \u03bd\u03b1 \u03c3\u03c5\u03b3\u03ba\u03c1\u03af\u03bd\u03bf\u03c5\u03bc\u03b5 \u03c4\u03bf \u03bc\u03bf\u03bd\u03c4\u03ad\u03bb\u03bf \u03bc\u03b5 \u03c4\u03b1 \u03c0\u03b5\u03b9\u03c1\u03ac\u03bc\u03b1\u03c4\u03b1, \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03bf\u03cd\u03bc\u03b5 \u03c4\u03bf \u03b3\u03b5\u03b3\u03bf\u03bd\u03cc\u03c2 \u03cc\u03c4\u03b9 \u03b7 \u03b3\u03c9\u03bd\u03b9\u03b1\u03ba\u03ae \u03bf\u03c1\u03bc\u03ae \u03c9\u03c2 \u03c0\u03c1\u03bf\u03c2 \u03c4\u03bf \u03ba\u03ad\u03bd\u03c4\u03c1\u03bf \u03bc\u03ac\u03b6\u03b1\u03c2, <span style=\"font-size: 12pt;\">L = I\u03c9<\/span>, \u03c0\u03c1\u03ad\u03c0\u03b5\u03b9 \u03bd\u03b1 \u03b4\u03b9\u03b1\u03c4\u03b7\u03c1\u03b7\u03b8\u03b5\u03af \u03ba\u03b1\u03c4\u03ac \u03c4\u03b7 \u03b4\u03b9\u03ac\u03c1\u03ba\u03b5\u03b9\u03b1 \u03c4\u03b7\u03c2 \u03b1\u03bd\u03b1\u03c3\u03c4\u03c1\u03bf\u03c6\u03ae\u03c2. \u03a3\u03cd\u03bc\u03c6\u03c9\u03bd\u03b1 \u03bc\u03b5 \u03b1\u03c5\u03c4\u03cc, \u03b1\u03bc\u03ad\u03c3\u03c9\u03c2 \u03c3\u03c5\u03bc\u03c0\u03b5\u03c1\u03b1\u03af\u03bd\u03bf\u03c5\u03bc\u03b5 \u03cc\u03c4\u03b9 \u03b7 \u03b1\u03b4\u03b9\u03ac\u03c3\u03c4\u03b1\u03c4\u03b7 \u03b3\u03c9\u03bd\u03b9\u03b1\u03ba\u03ae \u03c3\u03c5\u03c7\u03bd\u03cc\u03c4\u03b7\u03c4\u03b1 \u03c9 (t) \/ \u03c9<sub>0<\/sub> \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03bd\u03b1 \u03b5\u03ba\u03c6\u03c1\u03b1\u03c3\u03c4\u03b5\u03af \u03c9\u03c2:<\/p>\n<p><a name=\"id3211812986\"><\/a><\/p>\n<p class=\"ql-center-displayed-equation\" style=\"line-height: 42px;\"><span class=\"ql-right-eqno\"> (7) <\/span><span class=\"ql-left-eqno\"> &nbsp; <\/span><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/viewonphysics.gr\/wp-content\/ql-cache\/quicklatex.com-7423077836a216a3595655e94995db62_l3.png\" height=\"42\" width=\"93\" class=\"ql-img-displayed-equation quicklatex-auto-format\" alt=\"&#92;&#98;&#101;&#103;&#105;&#110;&#123;&#101;&#113;&#117;&#97;&#116;&#105;&#111;&#110;&#42;&#125;&#32;&#32; &#92;&#102;&#114;&#97;&#99;&#123;&#92;&#111;&#109;&#101;&#103;&#97;&#32;&#40;&#116;&#41;&#125;&#123;&#92;&#111;&#109;&#101;&#103;&#97;&#95;&#48;&#125;&#61;&#92;&#102;&#114;&#97;&#99;&#123;&#73;&#95;&#48;&#125;&#123;&#73;&#40;&#104;&#41;&#125; &#92;&#101;&#110;&#100;&#123;&#101;&#113;&#117;&#97;&#116;&#105;&#111;&#110;&#42;&#125;\" title=\"Rendered by QuickLaTeX.com\"\/><\/p>\n<p>\u03bc\u03b5 \u03c4\u03bf I (h) \u03c0\u03bf\u03c5 \u03b4\u03af\u03bd\u03b5\u03c4\u03b1\u03b9 \u03b1\u03c0\u03cc \u03c4\u03b7\u03bd \u03b5\u03be\u03af\u03c3\u03c9\u03c3\u03b7 (<a href=\"#id902837062\">6<\/a>). \u0395\u03b4\u03ce \u03c0\u03b1\u03c1\u03bf\u03c5\u03c3\u03b9\u03ac\u03c3\u03b1\u03bc\u03b5 \u03c4\u03b7\u03bd \u03b1\u03c1\u03c7\u03b9\u03ba\u03ae \u03c1\u03bf\u03c0\u03ae \u03b1\u03b4\u03c1\u03ac\u03bd\u03b5\u03b9\u03b1\u03c2 <span style=\"font-size: 12pt;\">I<sub>0<\/sub> = I (h<sub>0<\/sub>)<\/span>, \u03b7 \u03bf\u03c0\u03bf\u03af\u03b1 \u03b1\u03bd\u03c4\u03b9\u03c3\u03c4\u03bf\u03b9\u03c7\u03b5\u03af \u03c3\u03c4\u03b7\u03bd \u03ba\u03b1\u03c4\u03ac\u03c3\u03c4\u03b1\u03c3\u03b7 \u03c0\u03c1\u03b9\u03bd \u03b1\u03c0\u03cc \u03c4\u03b7\u03bd \u03b1\u03bd\u03b1\u03c3\u03c4\u03c1\u03bf\u03c6\u03ae \u03cc\u03c4\u03b1\u03bd \u03bf\u03b9 \u03b4\u03cd\u03bf \u03bc\u03c0\u03ac\u03bb\u03b5\u03c2 \u03c4\u03bf\u03c5 \u03c4\u03ad\u03bd\u03b9\u03c2 \u03b2\u03c1\u03af\u03c3\u03ba\u03bf\u03bd\u03c4\u03b1\u03b9 \u03c3\u03c4\u03bf \u03ba\u03ac\u03c4\u03c9 \u03bc\u03ad\u03c1\u03bf\u03c2 \u03c4\u03bf\u03c5 \u03b4\u03bf\u03c7\u03b5\u03af\u03bf\u03c5. \u03a0\u03b1\u03c1\u03b1\u03c4\u03b7\u03c1\u03ce\u03bd\u03c4\u03b1\u03c2 \u03c4\u03b7\u03bd<a href=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2018\/09\/Bottle-2.jpg\" target=\"_blank\" rel=\"noopener\"> \u0395\u03b9\u03ba. 2<\/a>, \u03b2\u03c1\u03af\u03c3\u03ba\u03bf\u03c5\u03bc\u03b5 <span style=\"font-size: 12pt;\">h<sub>0<\/sub> = 4R<\/span>.<\/p>\n<p>\u03a0\u03b1\u03c1\u03bf\u03c5\u03c3\u03b9\u03ac\u03b6\u03bf\u03c5\u03bc\u03b5 \u03c4\u03ce\u03c1\u03b1 \u03b4\u03cd\u03bf \u03b4\u03bf\u03ba\u03b9\u03bc\u03ad\u03c2 \u03c4\u03c9\u03bd \u03c0\u03c1\u03bf\u03b2\u03bb\u03ad\u03c8\u03b5\u03ce\u03bd \u03bc\u03b1\u03c2. \u03a0\u03c1\u03ce\u03c4\u03bf\u03bd, \u03b5\u03b9\u03c3\u03ac\u03b3\u03bf\u03c5\u03bc\u03b5 \u03c4\u03b7\u03bd \u03c0\u03b5\u03b9\u03c1\u03b1\u03bc\u03b1\u03c4\u03b9\u03ba\u03ac \u03bb\u03b7\u03c6\u03b8\u03b5\u03af\u03c3\u03b1 <span style=\"font-size: 12pt;\">h(t)<\/span> \u03c3\u03c4\u03b7\u03bd \u0395\u03be. (<a href=\"#id902837062\">6<\/a>) \u03ba\u03b1\u03b9 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03bf\u03cd\u03bc\u03b5 \u03c4\u03b7\u03bd \u03b5\u03be\u03af\u03c3\u03c9\u03c3\u03b7\u00a0 (<a href=\"#id3211812986\">7<\/a>) \u03b3\u03b9\u03b1 \u03c4\u03b7\u03bd \u03c0\u03c1\u03cc\u03b2\u03bb\u03b5\u03c8\u03b7 \u03c4\u03b7\u03c2 \u03b3\u03c9\u03bd\u03b9\u03b1\u03ba\u03ae\u03c2 \u03c4\u03b1\u03c7\u03cd\u03c4\u03b7\u03c4\u03b1\u03c2 <span style=\"font-size: 12pt;\">\u03c9(t)<\/span>. \u03a4\u03bf \u03b1\u03c0\u03bf\u03c4\u03ad\u03bb\u03b5\u03c3\u03bc\u03b1 \u03b5\u03bc\u03c6\u03b1\u03bd\u03af\u03b6\u03b5\u03c4\u03b1\u03b9 \u03c9\u03c2 \u03b7 \u03ba\u03af\u03c4\u03c1\u03b9\u03bd\u03b7 (\u03ad\u03b3\u03c7\u03c1\u03c9\u03bc\u03b7) \u03b4\u03b9\u03b1\u03ba\u03b5\u03ba\u03bf\u03bc\u03bc\u03ad\u03bd\u03b7 \u03b3\u03c1\u03b1\u03bc\u03bc\u03ae \u03c3\u03c4\u03b7\u03bd <a href=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2018\/10\/Bottle-4-2.jpg\" target=\"_blank\" rel=\"noopener\">\u0395\u03b9\u03ba. 4<\/a>. \u0395\u03af\u03bd\u03b1\u03b9 \u03c3\u03b1\u03c6\u03ad\u03c2 \u03cc\u03c4\u03b9 \u03b4\u03af\u03bd\u03b5\u03b9 \u03bc\u03b9\u03b1 \u03c0\u03bf\u03bb\u03cd \u03ba\u03b1\u03bb\u03ae \u03c0\u03b5\u03c1\u03b9\u03b3\u03c1\u03b1\u03c6\u03ae \u03c4\u03c9\u03bd \u03c0\u03b5\u03b9\u03c1\u03b1\u03bc\u03b1\u03c4\u03b9\u03ba\u03ce\u03bd \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd.<\/p>\n<p>\u03a9\u03c3\u03c4\u03cc\u03c3\u03bf, \u03bc\u03b9\u03b1 \u03b1\u03ba\u03cc\u03bc\u03b7 \u03c0\u03b9\u03bf \u03ac\u03bc\u03b5\u03c3\u03b7 \u03b5\u03c0\u03b1\u03bb\u03ae\u03b8\u03b5\u03c5\u03c3\u03b7 \u03c4\u03c9\u03bd \u0395\u03be\u03b9\u03c3. (<a href=\"#id902837062\">6<\/a>) \u03ba\u03b1\u03b9 (<a href=\"#id3211812986\">7<\/a>) \u03bb\u03b1\u03bc\u03b2\u03ac\u03bd\u03b5\u03c4\u03b1\u03b9 \u03bc\u03b5 \u03c3\u03c7\u03b5\u03b4\u03af\u03b1\u03c3\u03b7 \u03c4\u03bf\u03c5 \u03c0\u03b5\u03b9\u03c1\u03b1\u03bc\u03b1\u03c4\u03b9\u03ba\u03bf\u03cd \u03c9 \u03c3\u03b5 \u03c3\u03c5\u03bd\u03ac\u03c1\u03c4\u03b7\u03c3\u03b7 \u03bc\u03b5 \u03c4\u03bf \u03c0\u03b5\u03b9\u03c1\u03b1\u03bc\u03b1\u03c4\u03b9\u03ba\u03cc h. \u03a3\u03c4\u03b7\u03bd \u03c0\u03b5\u03c1\u03af\u03c0\u03c4\u03c9\u03c3\u03b7 \u03b1\u03c5\u03c4\u03ae, \u03b7 \u03c3\u03cd\u03b3\u03ba\u03c1\u03b9\u03c3\u03b7 \u03bc\u03b5\u03c4\u03b1\u03be\u03cd \u03b8\u03b5\u03c9\u03c1\u03af\u03b1\u03c2 \u03ba\u03b1\u03b9 \u03c0\u03b5\u03b9\u03c1\u03ac\u03bc\u03b1\u03c4\u03bf\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03c7\u03c9\u03c1\u03af\u03c2 \u03ba\u03b1\u03bc\u03af\u03b1 \u03b5\u03b9\u03c3\u03c1\u03bf\u03ae \u03b1\u03c0\u03cc \u03c4\u03bf \u03c0\u03b5\u03af\u03c1\u03b1\u03bc\u03b1. \u03a4\u03bf \u03b1\u03c0\u03bf\u03c4\u03ad\u03bb\u03b5\u03c3\u03bc\u03b1, \u03c0\u03bf\u03c5 \u03c0\u03b1\u03c1\u03bf\u03c5\u03c3\u03b9\u03ac\u03b6\u03b5\u03c4\u03b1\u03b9 \u03c3\u03c4\u03b7\u03bd <a href=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2018\/10\/Bottle-5-1.jpg\" target=\"_blank\" rel=\"noopener\">\u0395\u03b9\u03ba. 5<\/a>, \u03b4\u03b5\u03af\u03c7\u03bd\u03b5\u03b9 \u03bc\u03b9\u03b1 \u03b5\u03be\u03b1\u03b9\u03c1\u03b5\u03c4\u03b9\u03ba\u03ae \u03c3\u03c5\u03bc\u03c6\u03c9\u03bd\u03af\u03b1 \u03c7\u03c9\u03c1\u03af\u03c2 \u03c1\u03c5\u03b8\u03bc\u03b9\u03b6\u03cc\u03bc\u03b5\u03bd\u03b5\u03c2 \u03c0\u03b1\u03c1\u03b1\u03bc\u03ad\u03c4\u03c1\u03bf\u03c5\u03c2.<\/p>\n<div id=\"attachment_6861\" style=\"width: 314px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-6861\" class=\" wp-image-6861\" src=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2018\/10\/Bottle-5-1-195x300.jpg\" alt=\"\" width=\"304\" height=\"468\" srcset=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2018\/10\/Bottle-5-1-195x300.jpg 195w, https:\/\/viewonphysics.gr\/wp-content\/uploads\/2018\/10\/Bottle-5-1.jpg 570w\" sizes=\"auto, (max-width: 304px) 100vw, 304px\" \/><p id=\"caption-attachment-6861\" class=\"wp-caption-text\">\u0395\u03b9\u03ba. 5. \u03a0\u03b5\u03b9\u03c1\u03b1\u03bc\u03b1\u03c4\u03b9\u03ba\u03ac \u03b1\u03c0\u03bf\u03c4\u03b5\u03bb\u03ad\u03c3\u03bc\u03b1\u03c4\u03b1 \u03b3\u03b9\u03b1 \u03c4\u03b7 \u03b3\u03c9\u03bd\u03b9\u03b1\u03ba\u03ae \u03c4\u03b1\u03c7\u03cd\u03c4\u03b7\u03c4\u03b1 \u03c9 \u03c4\u03b7\u03c2 \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2 \u03c4\u03ad\u03bd\u03bd\u03b9\u03c2 (\u03ac\u03bd\u03c9 \u03bc\u03ad\u03c1\u03bf\u03c2) \u03ba\u03b1\u03b9 \u03c4\u03b7\u03c2 \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2 \u03bd\u03b5\u03c1\u03bf\u03cd (\u03ba\u03ac\u03c4\u03c9 \u03bc\u03ad\u03c1\u03bf\u03c2). \u03a4\u03b1 \u03b1\u03c0\u03bf\u03c4\u03b5\u03bb\u03ad\u03c3\u03bc\u03b1\u03c4\u03b1 \u03c4\u03c9\u03bd \u03bc\u03bf\u03bd\u03c4\u03ad\u03bb\u03c9\u03bd \u03b5\u03bc\u03c6\u03b1\u03bd\u03af\u03b6\u03bf\u03bd\u03c4\u03b1\u03b9 \u03c3\u03b5 \u03c3\u03c5\u03bd\u03b5\u03c7\u03b5\u03af\u03c2 (\u03ba\u03cc\u03ba\u03ba\u03b9\u03bd\u03b5\u03c2) \u03b3\u03c1\u03b1\u03bc\u03bc\u03ad\u03c2.<\/p><\/div>\n<p>&nbsp;<\/p>\n<h3><span style=\"color: #0000ff;\"><strong>\u0392. \u03a4\u03bf \u03c0\u03ad\u03c4\u03b1\u03b3\u03bc\u03b1 \u03c4\u03b7\u03c2 \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2 \u03bd\u03b5\u03c1\u03bf\u03cd: \u0388\u03bd\u03b1 \u03b5\u03bb\u03ac\u03c7\u03b9\u03c3\u03c4\u03bf \u03bc\u03bf\u03bd\u03bf\u03b4\u03b9\u03ac\u03c3\u03c4\u03b1\u03c4\u03bf \u03bc\u03bf\u03bd\u03c4\u03ad\u03bb\u03bf<\/strong><\/span><\/h3>\n<p>\u03a4\u03ce\u03c1\u03b1 \u03b5\u03c0\u03b9\u03c3\u03c4\u03c1\u03ad\u03c6\u03bf\u03c5\u03bc\u03b5 \u03c3\u03c4\u03b7\u03bd \u03c0\u03b5\u03c1\u03af\u03c0\u03c4\u03c9\u03c3\u03b7 \u03c4\u03b7\u03c2 \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2 \u03bd\u03b5\u03c1\u03bf\u03cd, \u03b3\u03b9\u03b1 \u03c4\u03b7\u03bd \u03bf\u03c0\u03bf\u03af\u03b1 \u03b7 \u03ba\u03b1\u03c4\u03b1\u03bd\u03bf\u03bc\u03ae \u03c4\u03b7\u03c2 \u03bc\u03ac\u03b6\u03b1\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03c0\u03c1\u03bf\u03c6\u03b1\u03bd\u03ce\u03c2 \u03c0\u03bf\u03bb\u03cd \u03c0\u03b9\u03bf \u03c0\u03b5\u03c1\u03af\u03c0\u03bb\u03bf\u03ba\u03b7. \u039f \u03c3\u03ba\u03bf\u03c0\u03cc\u03c2 \u03bc\u03b1\u03c2 \u03b5\u03b4\u03ce \u03b4\u03b5\u03bd \u03b5\u03af\u03bd\u03b1\u03b9 \u03bd\u03b1 \u03c0\u03b1\u03c1\u03ac\u03c3\u03c7\u03bf\u03c5\u03bc\u03b5 \u03bc\u03b9\u03b1 \u03c0\u03bb\u03ae\u03c1\u03c9\u03c2 \u03c0\u03bf\u03c3\u03bf\u03c4\u03b9\u03ba\u03ae \u03c0\u03b5\u03c1\u03b9\u03b3\u03c1\u03b1\u03c6\u03ae \u03c4\u03b7\u03c2 \u03bc\u03ac\u03b6\u03b1\u03c2 \u03c4\u03bf\u03c5 \u03c5\u03b3\u03c1\u03bf\u03cd \u03c0\u03bf\u03c5 \u03c4\u03b1\u03c1\u03ac\u03b6\u03b5\u03c4\u03b1\u03b9 \u03bc\u03ad\u03c3\u03b1 \u03c3\u03c4\u03b7 \u03c6\u03b9\u03ac\u03bb\u03b7, \u03b7 \u03bf\u03c0\u03bf\u03af\u03b1 \u03b8\u03b1 \u03b1\u03c0\u03b1\u03b9\u03c4\u03bf\u03cd\u03c3\u03b5 \u03bb\u03b5\u03c0\u03c4\u03bf\u03bc\u03b5\u03c1\u03ae \u03b1\u03c1\u03b9\u03b8\u03bc\u03b7\u03c4\u03b9\u03ba\u03ae \u03b5\u03c0\u03b5\u03be\u03b5\u03c1\u03b3\u03b1\u03c3\u03af\u03b1 \u03c4\u03c9\u03bd \u03b5\u03be\u03b9\u03c3\u03ce\u03c3\u03b5\u03c9\u03bd Navier-Stokes. \u0391\u03bd\u03c4 &#8216;\u03b1\u03c5\u03c4\u03bf\u03cd, \u03b8\u03ad\u03bb\u03bf\u03c5\u03bc\u03b5 \u03bd\u03b1 \u03c0\u03c1\u03bf\u03c4\u03b5\u03af\u03bd\u03bf\u03c5\u03bc\u03b5 \u03ad\u03bd\u03b1 \u03b5\u03bb\u03ac\u03c7\u03b9\u03c3\u03c4\u03bf \u03bc\u03bf\u03bd\u03c4\u03ad\u03bb\u03bf \u03c0\u03bf\u03c5 \u03bd\u03b1 \u03b5\u03c0\u03b9\u03c4\u03c1\u03ad\u03c0\u03b5\u03b9 \u03bc\u03b9\u03b1 \u03b5\u03cd\u03c0\u03b5\u03c0\u03c4\u03b7 \u03c0\u03b5\u03c1\u03b9\u03b3\u03c1\u03b1\u03c6\u03ae \u03c4\u03b7\u03c2 \u03ba\u03af\u03bd\u03b7\u03c3\u03b7\u03c2 \u03c4\u03b7\u03c2 \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2 \u03bd\u03b5\u03c1\u03bf\u03cd. \u0393\u03b9 &#8216;\u03b1\u03c5\u03c4\u03cc, \u03c0\u03c1\u03bf\u03c4\u03b5\u03af\u03bd\u03bf\u03c5\u03bc\u03b5 \u03ad\u03bd\u03b1 \u03b1\u03c0\u03bb\u03bf\u03c0\u03bf\u03b9\u03b7\u03bc\u03ad\u03bd\u03bf \u03bc\u03bf\u03bd\u03bf\u03b4\u03b9\u03ac\u03c3\u03c4\u03b1\u03c4\u03bf \u03bc\u03bf\u03bd\u03c4\u03ad\u03bb\u03bf. \u03a5\u03c0\u03bf\u03b8\u03ad\u03c4\u03bf\u03c5\u03bc\u03b5 \u03cc\u03c4\u03b9 \u03b7 \u03bc\u03ac\u03b6\u03b1 \u03bd\u03b5\u03c1\u03bf\u03cd <span style=\"font-size: 12pt;\">m<sub>w<\/sub><\/span> \u03ba\u03b1\u03c4\u03b1\u03bd\u03ad\u03bc\u03b5\u03c4\u03b1\u03b9 \u03c0\u03ac\u03bd\u03c4\u03bf\u03c4\u03b5 \u03bf\u03bc\u03bf\u03b9\u03cc\u03bc\u03bf\u03c1\u03c6\u03b1 \u03ba\u03b1\u03c4\u03ac \u03bc\u03ae\u03ba\u03bf\u03c2 \u03c4\u03b7\u03c2 \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2, \u03be\u03b5\u03ba\u03b9\u03bd\u03ce\u03bd\u03c4\u03b1\u03c2 \u03b1\u03c0\u03cc \u03c4\u03bf \u03ba\u03ac\u03c4\u03c9 \u03bc\u03ad\u03c1\u03bf\u03c2 \u03ba\u03b1\u03b9 \u03c6\u03b8\u03ac\u03bd\u03bf\u03bd\u03c4\u03b1\u03c2 \u03bc\u03ad\u03c7\u03c1\u03b9 \u03ad\u03bd\u03b1 \u03cd\u03c8\u03bf\u03c2 <span style=\"font-size: 12pt;\">h<\/span> (\u03b2\u03bb\u03ad\u03c0\u03b5 <a href=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2018\/09\/Bottle-2.jpg\" target=\"_blank\" rel=\"noopener\">\u0395\u03b9\u03ba. 2<\/a>). \u0391\u03c5\u03c4\u03cc \u03c4\u03bf \u03cd\u03c8\u03bf\u03c2 h \u03b8\u03b1 \u03bc\u03b5\u03c4\u03b1\u03b2\u03ac\u03bb\u03bb\u03b5\u03c4\u03b1\u03b9 \u03bc\u03b5 \u03c4\u03bf \u03c7\u03c1\u03cc\u03bd\u03bf \u03ba\u03b1\u03b8\u03ce\u03c2 \u03b7 \u03c6\u03b9\u03ac\u03bb\u03b7 \u03c0\u03b5\u03c1\u03b9\u03c3\u03c4\u03c1\u03ad\u03c6\u03b5\u03c4\u03b1\u03b9 \u03c3\u03c4\u03bf\u03bd \u03b1\u03ad\u03c1\u03b1. \u039a\u03b1\u03b9 \u03c0\u03ac\u03bb\u03b9, \u03bf\u03c1\u03af\u03b6\u03bf\u03c5\u03bc\u03b5 \u03c4\u03b7\u03bd \u03b5\u03bb\u03ac\u03c7\u03b9\u03c3\u03c4\u03b7 \u03c4\u03b9\u03bc\u03ae \u03c4\u03bf\u03c5 \u03cd\u03c8\u03bf\u03c5\u03c2 \u03c9\u03c2 <span style=\"font-size: 12pt;\">h<sub>0<\/sub><\/span>, \u03b7 \u03bf\u03c0\u03bf\u03af\u03b1 \u03b1\u03bd\u03c4\u03b9\u03c3\u03c4\u03bf\u03b9\u03c7\u03b5\u03af \u03c3\u03c4\u03b7\u03bd \u03ba\u03b1\u03c4\u03ac\u03c3\u03c4\u03b1\u03c3\u03b7 \u03c0\u03c1\u03b9\u03bd \u03b1\u03c0\u03cc \u03c4\u03b7\u03bd \u03b1\u03bd\u03b1\u03c3\u03c4\u03c1\u03bf\u03c6\u03ae \u03cc\u03c0\u03bf\u03c5 \u03cc\u03bb\u03b7 \u03b7 \u03bc\u03ac\u03b6\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 \u03c3\u03c5\u03b3\u03ba\u03b5\u03be\u03c4\u03c1\u03c9\u03bc\u03ad\u03bd\u03b7 \u03c3\u03c4\u03bf \u03ba\u03ac\u03c4\u03c9 \u03bc\u03ad\u03c1\u03bf\u03c2. \u0397 \u03bc\u03ad\u03b3\u03b9\u03c3\u03c4\u03b7 \u03b4\u03c5\u03bd\u03b1\u03c4\u03ae \u03c4\u03b9\u03bc\u03ae \u03c4\u03bf\u03c5 <span style=\"font-size: 12pt;\">h<\/span> \u03b4\u03af\u03bd\u03b5\u03c4\u03b1\u03b9 \u03b1\u03c0\u03cc \u03c4\u03bf \u03cd\u03c8\u03bf\u03c2 \u03c4\u03b7\u03c2 \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2 <span style=\"font-size: 12pt;\">\u0397<\/span>. \u0393\u03b9\u03b1 \u03bb\u03cc\u03b3\u03bf\u03c5\u03c2 \u03b1\u03c0\u03bb\u03cc\u03c4\u03b7\u03c4\u03b1\u03c2, \u03b8\u03b5\u03c9\u03c1\u03bf\u03cd\u03bc\u03b5 \u03b5\u03c0\u03b9\u03c0\u03bb\u03ad\u03bf\u03bd \u03cc\u03c4\u03b9 \u03b7 \u03bc\u03ac\u03b6\u03b1 \u03c0\u03c1\u03cc\u03ba\u03b5\u03b9\u03c4\u03b1\u03b9 \u03bd\u03b1 \u03ba\u03b1\u03c4\u03b1\u03bd\u03b5\u03bc\u03b7\u03b8\u03b5\u03af \u03ba\u03b1\u03c4\u03ac \u03bc\u03ae\u03ba\u03bf\u03c2 \u03c4\u03bf\u03c5 \u03ac\u03be\u03bf\u03bd\u03b1 \u03c4\u03b7\u03c2 \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2.<\/p>\n<p><strong>1. \u039a\u03ad\u03bd\u03c4\u03c1\u03bf \u03bc\u03ac\u03b6\u03b1\u03c2<\/strong><\/p>\n<p>\u0393\u03b9\u03b1 \u03ac\u03bb\u03bb\u03b7 \u03bc\u03b9\u03b1 \u03c6\u03bf\u03c1\u03ac, \u03c0\u03c1\u03bf\u03c3\u03b4\u03b9\u03bf\u03c1\u03af\u03b6\u03bf\u03c5\u03bc\u03b5 \u03c0\u03c1\u03ce\u03c4\u03b1 \u03c4\u03bf \u03ba\u03ad\u03bd\u03c4\u03c1\u03bf \u03bc\u03ac\u03b6\u03b1\u03c2 \u03c4\u03bf\u03c5 \u03c3\u03c5\u03bd\u03b4\u03c5\u03b1\u03c3\u03bc\u03ad\u03bd\u03bf\u03c5 \u03c3\u03c5\u03c3\u03c4\u03ae\u03bc\u03b1\u03c4\u03bf\u03c2 \u03c4\u03b7\u03c2 \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2 (\u03bc\u03ac\u03b6\u03b1 <span style=\"font-size: 12pt;\">m<sub>b<\/sub><\/span>) \u03ba\u03b1\u03b9 \u03c4\u03bf\u03c5 \u03bd\u03b5\u03c1\u03bf\u03cd (\u03bc\u03ac\u03b6\u03b1 <span style=\"font-size: 12pt;\">m<sub>w<\/sub><\/span>). \u03a4\u03bf \u03ba\u03ad\u03bd\u03c4\u03c1\u03bf \u03c4\u03b7\u03c2 \u03bc\u03ac\u03b6\u03b1\u03c2 \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03bd\u03b1 \u03b2\u03c1\u03b5\u03b8\u03b5\u03af \u03bb\u03b1\u03bc\u03b2\u03ac\u03bd\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c4\u03bf\u03bd \u03c3\u03c4\u03b1\u03b8\u03bc\u03b9\u03c3\u03bc\u03ad\u03bd\u03bf \u03bc\u03ad\u03c3\u03bf \u03cc\u03c1\u03bf \u03c4\u03bf\u03c5 \u03ba\u03ad\u03bd\u03c4\u03c1\u03bf\u03c5 \u03bc\u03ac\u03b6\u03b1\u03c2 \u03c4\u03b7\u03c2 \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2, \u03c0\u03bf\u03c5 \u03b2\u03c1\u03af\u03c3\u03ba\u03b5\u03c4\u03b1\u03b9 \u03c3\u03c4\u03bf H \/ 2, \u03ba\u03b1\u03b9 \u03c4\u03bf\u03c5 \u03ba\u03b1\u03c4\u03b1\u03bd\u03b5\u03bc\u03b7\u03bc\u03ad\u03bd\u03bf\u03c5 \u03bd\u03b5\u03c1\u03bf\u03cd, \u03c0\u03bf\u03c5 \u03b2\u03c1\u03af\u03c3\u03ba\u03b5\u03c4\u03b1\u03b9 \u03c3\u03c4\u03bf h \/ 2. \u039c\u03b5 \u03b1\u03c5\u03c4\u03cc, \u03b7 \u03b8\u03ad\u03c3\u03b7 \u03c4\u03bf\u03c5 \u03ba\u03ad\u03bd\u03c4\u03c1\u03bf\u03c5 \u03bc\u03ac\u03b6\u03b1\u03c2 \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03bd\u03b1 \u03b2\u03c1\u03b5\u03b8\u03b5\u03af \u03c9\u03c2:<\/p>\n<p><a name=\"id2842355781\"><\/a><\/p>\n<p class=\"ql-center-displayed-equation\" style=\"line-height: 54px;\"><span class=\"ql-right-eqno\"> (8) <\/span><span class=\"ql-left-eqno\"> &nbsp; <\/span><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/viewonphysics.gr\/wp-content\/ql-cache\/quicklatex.com-7e37a491e92ad2fd74091b4d086f4c4b_l3.png\" height=\"54\" width=\"324\" class=\"ql-img-displayed-equation quicklatex-auto-format\" alt=\"&#92;&#98;&#101;&#103;&#105;&#110;&#123;&#101;&#113;&#117;&#97;&#116;&#105;&#111;&#110;&#42;&#125;&#32;&#32; &#104;&#95;&#123;&#67;&#77;&#125;&#61;&#92;&#102;&#114;&#97;&#99;&#123;&#92;&#102;&#114;&#97;&#99;&#123;&#72;&#125;&#123;&#50;&#125;&#109;&#95;&#98;&#43;&#92;&#102;&#114;&#97;&#99;&#123;&#104;&#125;&#123;&#50;&#125;&#109;&#95;&#119;&#125;&#123;&#109;&#95;&#98;&#43;&#109;&#95;&#119;&#125;&#61;&#92;&#102;&#114;&#97;&#99;&#123;&#72;&#125;&#123;&#50;&#125;&#32;&#92;&#108;&#101;&#102;&#116;&#32;&#40;&#32;&#92;&#102;&#114;&#97;&#99;&#123;&#109;&#95;&#98;&#43;&#109;&#95;&#119;&#32;&#92;&#102;&#114;&#97;&#99;&#123;&#104;&#125;&#123;&#72;&#125;&#125;&#123;&#109;&#95;&#98;&#43;&#109;&#95;&#119;&#125;&#32;&#92;&#114;&#105;&#103;&#104;&#116;&#32;&#41; &#92;&#101;&#110;&#100;&#123;&#101;&#113;&#117;&#97;&#116;&#105;&#111;&#110;&#42;&#125;\" title=\"Rendered by QuickLaTeX.com\"\/><\/p>\n<p>\u0391\u03c5\u03c4\u03ae \u03b7 \u03ad\u03ba\u03c6\u03c1\u03b1\u03c3\u03b7 \u03ad\u03c7\u03b5\u03b9 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03b7\u03b8\u03b5\u03af \u03c3\u03c4\u03b1 \u03c0\u03b5\u03b9\u03c1\u03ac\u03bc\u03b1\u03c4\u03b1 \u03c4\u03b7\u03c2 \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2 \u03bd\u03b5\u03c1\u03bf\u03cd \u03b3\u03b9\u03b1 \u03c4\u03b7 \u03bb\u03ae\u03c8\u03b7 \u03c4\u03b7\u03c2 \u03b8\u03ad\u03c3\u03b7\u03c2 \u03c4\u03bf\u03c5 \u03ba\u03ad\u03bd\u03c4\u03c1\u03bf\u03c5 \u03bc\u03ac\u03b6\u03b1\u03c2 (CM)\u00a0 (\u03b2\u03bb. <a href=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2018\/10\/Bottle-3-1.jpg\" target=\"_blank\" rel=\"noopener\">\u0395\u03b9\u03ba. 3<\/a>).<\/p>\n<p><strong>2. \u03a1\u03bf\u03c0\u03ae \u03b1\u03b4\u03c1\u03ac\u03bd\u03b5\u03b9\u03b1\u03c2<\/strong><\/p>\n<p>\u03a4\u03bf \u03b5\u03c0\u03cc\u03bc\u03b5\u03bd\u03bf \u03b2\u03ae\u03bc\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 \u03bd\u03b1 \u03c0\u03c1\u03bf\u03c3\u03b4\u03b9\u03bf\u03c1\u03b9\u03c3\u03c4\u03b5\u03af \u03b7 \u03c1\u03bf\u03c0\u03ae \u03b1\u03b4\u03c1\u03ac\u03bd\u03b5\u03b9\u03b1\u03c2, <span style=\"font-size: 12pt;\">\u0399, <\/span>\u03c4\u03bf\u03c5 \u03c3\u03c5\u03c3\u03c4\u03ae\u03bc\u03b1\u03c4\u03bf\u03c2, \u03bc\u03b5\u03c4\u03c1\u03bf\u03cd\u03bc\u03b5\u03bd\u03b7 \u03c3\u03b5 \u03c3\u03c5\u03bd\u03ac\u03c1\u03c4\u03b7\u03c3\u03b7 \u03bc\u03b5 \u03c4\u03b7 \u03b8\u03ad\u03c3\u03b7 \u03c4\u03bf\u03c5 \u03ba\u03ad\u03bd\u03c4\u03c1\u03bf\u03c5 \u03bc\u03ac\u03b6\u03b1\u03c2 <span style=\"font-size: 12pt;\">h<sub>CM<\/sub><\/span>. \u03a3\u03b5 \u03b1\u03bd\u03b1\u03bb\u03bf\u03b3\u03af\u03b1 \u03bc\u03b5 \u03c4\u03b7 \u03c6\u03b9\u03ac\u03bb\u03b7 \u03c4\u03bf\u03c5 \u03c4\u03ad\u03bd\u03b9\u03c2, \u03c0\u03c1\u03bf\u03c3\u03b4\u03b9\u03bf\u03c1\u03af\u03b6\u03bf\u03c5\u03bc\u03b5 \u03be\u03b5\u03c7\u03c9\u03c1\u03b9\u03c3\u03c4\u03ac \u03c4\u03b9\u03c2 \u03c1\u03bf\u03c0\u03ad\u03c2 \u03b1\u03b4\u03c1\u03ac\u03bd\u03b5\u03b9\u03b1\u03c2 <span style=\"font-size: 12pt;\">I<sub>b<\/sub><\/span> \u03c4\u03b7\u03c2 \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2\u00a0 \u03ba\u03b1\u03b9 <span style=\"font-size: 12pt;\">I<sub>w<\/sub><\/span> \u03c4\u03bf\u03c5 \u03bd\u03b5\u03c1\u03bf\u03cd , \u03b7 \u03bf\u03c0\u03bf\u03af\u03b1 \u03bf\u03b4\u03b7\u03b3\u03b5\u03af \u03c3\u03c4\u03b7 \u03c3\u03c5\u03bd\u03bf\u03bb\u03b9\u03ba\u03ae \u03c1\u03bf\u03c0\u03ae \u03b1\u03b4\u03c1\u03ac\u03bd\u03b5\u03b9\u03b1\u03c2 <span style=\"font-size: 12pt;\">I = I<sub>b<\/sub> + I<sub>w<\/sub><\/span>. \u03a7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03ce\u03bd\u03c4\u03b1\u03c2 \u03c4\u03bf \u03b8\u03b5\u03ce\u03c1\u03b7\u03bc\u03b1 \u03c4\u03bf\u03c5 \u03c0\u03b1\u03c1\u03ac\u03bb\u03bb\u03b7\u03bb\u03bf\u03c5 \u03ac\u03be\u03bf\u03bd\u03b1, \u03b2\u03c1\u03af\u03c3\u03ba\u03bf\u03c5\u03bc\u03b5 \u03cc\u03c4\u03b9 \u03b7 \u03c1\u03bf\u03c0\u03ae \u03b1\u03b4\u03c1\u03ac\u03bd\u03b5\u03b9\u03b1\u03c2 \u03c4\u03b7\u03c2 \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9:<\/p>\n<p><a name=\"id2729034837\"><\/a><\/p>\n<p class=\"ql-center-displayed-equation\" style=\"line-height: 46px;\"><span class=\"ql-right-eqno\"> (9) <\/span><span class=\"ql-left-eqno\"> &nbsp; <\/span><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/viewonphysics.gr\/wp-content\/ql-cache\/quicklatex.com-3dcbb2fd3698de97e98bf5089d67aae9_l3.png\" height=\"46\" width=\"215\" class=\"ql-img-displayed-equation quicklatex-auto-format\" alt=\"&#92;&#98;&#101;&#103;&#105;&#110;&#123;&#101;&#113;&#117;&#97;&#116;&#105;&#111;&#110;&#42;&#125;&#32;&#32; &#104;&#95;&#98;&#61;&#73;&#95;&#48;&#43;&#109;&#95;&#98;&#32;&#92;&#108;&#101;&#102;&#116;&#32;&#40;&#32;&#92;&#102;&#114;&#97;&#99;&#123;&#72;&#125;&#123;&#50;&#125;&#45;&#32;&#104;&#95;&#123;&#67;&#77;&#125;&#32;&#92;&#114;&#105;&#103;&#104;&#116;&#32;&#41;&#94;&#50; &#92;&#101;&#110;&#100;&#123;&#101;&#113;&#117;&#97;&#116;&#105;&#111;&#110;&#42;&#125;\" title=\"Rendered by QuickLaTeX.com\"\/><\/p>\n<p>\u038c\u03c0\u03bf\u03c5, <span style=\"font-size: 12pt;\">I<sub>0<\/sub><\/span> \u03b5\u03af\u03bd\u03b1\u03b9 \u03b7 \u03c1\u03bf\u03c0\u03ae \u03b1\u03b4\u03c1\u03ac\u03bd\u03b5\u03b9\u03b1\u03c2 \u03c4\u03b7\u03c2 \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2 \u03c9\u03c2 \u03c0\u03c1\u03bf\u03c2 \u03ad\u03bd\u03b1\u03bd \u03ac\u03be\u03bf\u03bd\u03b1 \u03c0\u03bf\u03c5 \u03b4\u03b9\u03ad\u03c1\u03c7\u03b5\u03c4\u03b1\u03b9 \u03b1\u03c0\u03cc \u03c4\u03bf \u03b4\u03b9\u03ba\u03cc \u03c4\u03b7\u03c2 \u03ba\u03ad\u03bd\u03c4\u03c1\u03bf \u03bc\u03ac\u03b6\u03b1\u03c2 (\u03c0\u03bf\u03c5 \u03b2\u03c1\u03af\u03c3\u03ba\u03b5\u03c4\u03b1\u03b9 \u03c0\u03b5\u03c1\u03af\u03c0\u03bf\u03c5 \u03c3\u03c4\u03bf H \/ 2), \u03b5\u03bd\u03ce \u03bf \u03b4\u03b5\u03cd\u03c4\u03b5\u03c1\u03bf\u03c2 \u03cc\u03c1\u03bf\u03c2 \u03b1\u03bd\u03c4\u03b9\u03c3\u03c4\u03bf\u03b9\u03c7\u03b5\u03af \u03c3\u03c4\u03b7 \u03bc\u03b5\u03c4\u03b1\u03c4\u03cc\u03c0\u03b9\u03c3\u03b7 \u03c3\u03c4\u03bf \u03ba\u03ad\u03bd\u03c4\u03c1\u03bf \u03bc\u03ac\u03b6\u03b1\u03c2 \u03c4\u03bf\u03c5 \u03c3\u03c5\u03c3\u03c4\u03ae\u03bc\u03b1\u03c4\u03bf\u03c2 \u03c3\u03c4\u03b7\u03bd \u03b8\u03ad\u03c3\u03b7 <span style=\"font-size: 12pt;\">h<sub>CM<\/sub><\/span>. \u0394\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03bf\u03c5 \u03cc\u03c4\u03b9 \u03b8\u03b5\u03c9\u03c1\u03bf\u03cd\u03bc\u03b5 \u03bc\u03b9\u03b1 \u03b1\u03c0\u03bb\u03bf\u03c0\u03bf\u03b9\u03b7\u03bc\u03ad\u03bd\u03b7 \u03bc\u03bf\u03bd\u03bf\u03b4\u03b9\u03ac\u03c3\u03c4\u03b1\u03c4\u03b7 \u03c0\u03b5\u03c1\u03b9\u03b3\u03c1\u03b1\u03c6\u03ae, \u03b8\u03b1 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03ae\u03c3\u03bf\u03c5\u03bc\u03b5 \u03c3\u03c4\u03bf \u03b5\u03be\u03ae\u03c2 <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/viewonphysics.gr\/wp-content\/ql-cache\/quicklatex.com-77236390acdfc268b5546368b9b11e4e_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"&#32;&#73;&#95;&#48;&#32;&#61;&#32;&#40;&#49;&#47;&#49;&#50;&#41;&#32;&#109;&#95;&#98;&#72;&#94;&#50;\" title=\"Rendered by QuickLaTeX.com\" height=\"20\" width=\"134\" style=\"vertical-align: -5px;\"\/>. \u0391\u03c5\u03c4\u03ae \u03b5\u03af\u03bd\u03b1\u03b9 \u03b7 \u03ad\u03ba\u03c6\u03c1\u03b1\u03c3\u03b7 \u03c0\u03bf\u03c5 \u03b9\u03c3\u03c7\u03cd\u03b5\u03b9 \u03b3\u03b9\u03b1 \u03c4\u03b1 \u03bb\u03b5\u03c0\u03c4\u03ac \u03b1\u03bd\u03c4\u03b9\u03ba\u03b5\u03af\u03bc\u03b5\u03bd\u03b1, \u03cc\u03c0\u03bf\u03c5 \u03cc\u03bb\u03b7 \u03b7 \u03bc\u03ac\u03b6\u03b1 \u03b2\u03c1\u03af\u03c3\u03ba\u03b5\u03c4\u03b1\u03b9 \u03ba\u03b1\u03c4\u03ac \u03bc\u03ae\u03ba\u03bf\u03c2 \u03c4\u03bf\u03c5 \u03ac\u03be\u03bf\u03bd\u03b1, \u03ba\u03b1\u03b9 \u03b5\u03c0\u03af\u03c3\u03b7\u03c2 \u03b1\u03bd\u03b1\u03ba\u03c4\u03ac\u03c4\u03b1\u03b9 \u03b1\u03c0\u03cc \u03c4\u03b7\u03bd \u03b5\u03be\u03af\u03c3\u03c9\u03c3\u03b7 (<a href=\"#id3693702910\">2<\/a>)\u00a0 \u03b1\u03bd R = 0. \u0397 \u03b5\u03be\u03af\u03c3\u03c9\u03c3\u03b7 (<a href=\"#id3693702910\">2<\/a>) \u03c3\u03c4\u03b7\u03bd \u03c0\u03c1\u03b1\u03b3\u03bc\u03b1\u03c4\u03b9\u03ba\u03cc\u03c4\u03b7\u03c4\u03b1 \u03b5\u03c0\u03b9\u03c4\u03c1\u03ad\u03c0\u03b5\u03b9 \u03c4\u03b7\u03bd \u03b5\u03ba\u03c4\u03af\u03bc\u03b7\u03c3\u03b7 \u03c4\u03b7\u03c2 \u03b4\u03b9\u03cc\u03c1\u03b8\u03c9\u03c3\u03b7\u03c2 \u03c4\u03bf\u03c5 \u03c3\u03c6\u03ac\u03bb\u03bc\u03b1\u03c4\u03bf\u03c2 \u03c0\u03bf\u03c5 \u03c0\u03c1\u03bf\u03ba\u03b1\u03bb\u03b5\u03af\u03c4\u03b1\u03b9 \u03b1\u03c0\u03cc \u03c4\u03bf \u03b3\u03b5\u03b3\u03bf\u03bd\u03cc\u03c2 \u03cc\u03c4\u03b9 \u03b7 \u03bc\u03ac\u03b6\u03b1 \u03bd\u03b5\u03c1\u03bf\u03cd \u03b4\u03b5\u03bd \u03b2\u03c1\u03af\u03c3\u03ba\u03b5\u03c4\u03b1\u03b9 \u03c3\u03c4\u03bf\u03bd \u03ac\u03be\u03bf\u03bd\u03b1, \u03b5\u03bd\u03ce \u03c4\u03bf \u03c3\u03c7\u03b5\u03c4\u03b9\u03ba\u03cc \u03c3\u03c6\u03ac\u03bb\u03bc\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/viewonphysics.gr\/wp-content\/ql-cache\/quicklatex.com-4ac8ea9866d68abcb8c503d162368fae_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"&#54;&#82;&#94;&#50;&#32;&#47;&#32;&#72;&#94;&#50;\" title=\"Rendered by QuickLaTeX.com\" height=\"20\" width=\"62\" style=\"vertical-align: -5px;\"\/>, \u03c4\u03bf \u03bf\u03c0\u03bf\u03af\u03bf \u03b4\u03af\u03bd\u03b5\u03b9 \u03c3\u03c6\u03ac\u03bb\u03bc\u03b1 \u03c0\u03b5\u03c1\u03af\u03c0\u03bf\u03c5 12% \u03b3\u03b9\u03b1 \u03c4\u03b7 \u03c6\u03b9\u03ac\u03bb\u03b7 \u03bd\u03b5\u03c1\u03bf\u03cd \u03c0\u03bf\u03c5 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03ae\u03b8\u03b7\u03ba\u03b5 \u03c3\u03c4\u03b7 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b7 \u03bc\u03b1\u03c2 <span style=\"font-size: 12pt;\">(R \/ H \u22481 \/ 7)<\/span>. \u039c\u03b5 \u03c0\u03b1\u03c1\u03cc\u03bc\u03bf\u03b9\u03bf \u03c4\u03c1\u03cc\u03c0\u03bf, \u03bc\u03c0\u03bf\u03c1\u03bf\u03cd\u03bc\u03b5 \u03bd\u03b1 \u03b5\u03ba\u03c6\u03c1\u03ac\u03c3\u03bf\u03c5\u03bc\u03b5 \u03c4\u03b7 \u03c1\u03bf\u03c0\u03ae \u03b1\u03b4\u03c1\u03ac\u03bd\u03b5\u03b9\u03b1\u03c2 \u03c4\u03b7\u03c2 \u03bc\u03bf\u03bd\u03bf\u03b4\u03b9\u03ac\u03c3\u03c4\u03b1\u03c4\u03b7\u03c2 \u03c3\u03c4\u03ae\u03bb\u03b7\u03c2 \u03bd\u03b5\u03c1\u03bf\u03cd \u03c9\u03c2:<\/p>\n<p><a name=\"id3368447741\"><\/a><\/p>\n<p class=\"ql-center-displayed-equation\" style=\"line-height: 46px;\"><span class=\"ql-right-eqno\"> (10) <\/span><span class=\"ql-left-eqno\"> &nbsp; <\/span><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/viewonphysics.gr\/wp-content\/ql-cache\/quicklatex.com-8c9aefe17794562ae47e866413a2a581_l3.png\" height=\"46\" width=\"259\" class=\"ql-img-displayed-equation quicklatex-auto-format\" alt=\"&#92;&#98;&#101;&#103;&#105;&#110;&#123;&#101;&#113;&#117;&#97;&#116;&#105;&#111;&#110;&#42;&#125;&#32;&#32; &#104;&#95;&#119;&#61;&#92;&#102;&#114;&#97;&#99;&#123;&#49;&#125;&#123;&#49;&#50;&#125;&#109;&#95;&#119;&#104;&#94;&#50;&#43;&#77;&#32;&#92;&#108;&#101;&#102;&#116;&#32;&#40;&#32;&#92;&#102;&#114;&#97;&#99;&#123;&#104;&#125;&#123;&#50;&#125;&#45;&#104;&#95;&#123;&#67;&#77;&#125;&#32;&#92;&#114;&#105;&#103;&#104;&#116;&#32;&#41;&#94;&#50; &#92;&#101;&#110;&#100;&#123;&#101;&#113;&#117;&#97;&#116;&#105;&#111;&#110;&#42;&#125;\" title=\"Rendered by QuickLaTeX.com\"\/><\/p>\n<p>\u0397 \u03c3\u03c5\u03bd\u03bf\u03bb\u03ba\u03ae \u03c1\u03bf\u03c0\u03ae \u03b1\u03b4\u03c1\u03ac\u03bd\u03b5\u03b9\u03b1\u03c2 \u03c4\u03cc\u03c4\u03b5 \u03b3\u03af\u03bd\u03b5\u03c4\u03b1\u03b9:<\/p>\n<p><a name=\"id4074712244\"><\/a><\/p>\n<p class=\"ql-center-displayed-equation\" style=\"line-height: 99px;\"><span class=\"ql-right-eqno\"> (11) <\/span><span class=\"ql-left-eqno\"> &nbsp; <\/span><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/viewonphysics.gr\/wp-content\/ql-cache\/quicklatex.com-a77dbf34dabcb85a839c3862aea3892e_l3.png\" height=\"99\" width=\"569\" class=\"ql-img-displayed-equation quicklatex-auto-format\" alt=\"&#92;&#98;&#101;&#103;&#105;&#110;&#123;&#101;&#113;&#117;&#97;&#116;&#105;&#111;&#110;&#42;&#125;&#32;&#32; &#92;&#98;&#101;&#103;&#105;&#110;&#123;&#115;&#112;&#108;&#105;&#116;&#125; &#73;&#61;&#73;&#95;&#98;&#43;&#73;&#95;&#119;&#61;&#38;&#92;&#102;&#114;&#97;&#99;&#123;&#49;&#125;&#123;&#49;&#50;&#125;&#40;&#109;&#95;&#98;&#72;&#94;&#50;&#43;&#109;&#95;&#119;&#104;&#94;&#50;&#41;&#43;&#109;&#95;&#98;&#32;&#92;&#108;&#101;&#102;&#116;&#32;&#40;&#92;&#102;&#114;&#97;&#99;&#123;&#72;&#125;&#123;&#50;&#125;&#45;&#104;&#95;&#123;&#67;&#77;&#125;&#32;&#92;&#114;&#105;&#103;&#104;&#116;&#41;&#94;&#50;&#43;&#109;&#95;&#119;&#32;&#92;&#108;&#101;&#102;&#116;&#32;&#40;&#92;&#102;&#114;&#97;&#99;&#123;&#104;&#125;&#123;&#50;&#125;&#45;&#104;&#95;&#123;&#67;&#77;&#125;&#32;&#92;&#114;&#105;&#103;&#104;&#116;&#32;&#41;&#94;&#50;&#32;&#92;&#92; &#38;&#32;&#43;&#109;&#95;&#119;&#32;&#92;&#108;&#101;&#102;&#116;&#32;&#40;&#32;&#92;&#102;&#114;&#97;&#99;&#123;&#104;&#125;&#123;&#50;&#125;&#45;&#104;&#95;&#123;&#67;&#77;&#125;&#32;&#92;&#114;&#105;&#103;&#104;&#116;&#32;&#41;&#94;&#50; &#92;&#101;&#110;&#100;&#123;&#115;&#112;&#108;&#105;&#116;&#125; &#92;&#101;&#110;&#100;&#123;&#101;&#113;&#117;&#97;&#116;&#105;&#111;&#110;&#42;&#125;\" title=\"Rendered by QuickLaTeX.com\"\/><\/p>\n<p>\u03cc\u03c0\u03bf\u03c5, \u03c0\u03c1\u03bf\u03c6\u03b1\u03bd\u03ce\u03c2 \u03c4\u03bf<span style=\"font-size: 12pt;\"> h<sub>CM<\/sub><\/span> \u03b4\u03af\u03bd\u03b5\u03c4\u03b1\u03b9 \u03b1\u03c0\u03cc \u03c4\u03b7\u03bd \u03b5\u03be\u03af\u03c3\u03c9\u03c3\u03b7 (<a href=\"#id2842355781\">8<\/a>).<\/p>\n<p><strong>3. \u03a3\u03cd\u03b3\u03ba\u03c1\u03b9\u03c3\u03b7 \u03c3\u03c4\u03b1 \u03c0\u03b5\u03b9\u03c1\u03ac\u03bc\u03b1\u03c4\u03b1<\/strong><\/p>\n<p>\u03a4\u03ce\u03c1\u03b1 \u03ba\u03ac\u03bd\u03bf\u03c5\u03bc\u03b5 \u03c4\u03b7\u03bd \u03af\u03b4\u03b9\u03b1 \u03c3\u03cd\u03b3\u03ba\u03c1\u03b9\u03c3\u03b7 \u03c3\u03c4\u03b1 \u03c0\u03b5\u03b9\u03c1\u03ac\u03bc\u03b1\u03c4\u03b1, \u03cc\u03c0\u03c9\u03c2 \u03ba\u03ac\u03bd\u03b1\u03bc\u03b5 \u03bc\u03b5 \u03c4\u03b7\u03bd \u03bc\u03c0\u03bf\u03c4\u03af\u03bb\u03b9\u03b1 \u03c4\u03bf\u03c5 \u03c4\u03ad\u03bd\u03b9\u03c2. \u0391\u03c5\u03c4\u03ae \u03b5\u03c0\u03af\u03c3\u03b7\u03c2 \u03b2\u03b1\u03c3\u03af\u03b6\u03b5\u03c4\u03b1\u03b9 \u03c3\u03c4\u03b7 \u03c3\u03c7\u03ad\u03c3\u03b7:<\/p>\n<p><a name=\"id2612354549\"><\/a><\/p>\n<p class=\"ql-center-displayed-equation\" style=\"line-height: 42px;\"><span class=\"ql-right-eqno\"> (12) <\/span><span class=\"ql-left-eqno\"> &nbsp; <\/span><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/viewonphysics.gr\/wp-content\/ql-cache\/quicklatex.com-b6fe3a85fa22a7d0226b7062c90cdb25_l3.png\" height=\"42\" width=\"99\" class=\"ql-img-displayed-equation quicklatex-auto-format\" alt=\"&#92;&#98;&#101;&#103;&#105;&#110;&#123;&#101;&#113;&#117;&#97;&#116;&#105;&#111;&#110;&#42;&#125;&#32;&#32; &#92;&#102;&#114;&#97;&#99;&#123;&#92;&#111;&#109;&#101;&#103;&#97;&#32;&#40;&#116;&#41;&#125;&#123;&#92;&#111;&#109;&#101;&#103;&#97;&#95;&#48;&#125;&#61;&#92;&#102;&#114;&#97;&#99;&#123;&#73;&#95;&#48;&#125;&#123;&#73;&#40;&#104;&#41;&#125;&#44; &#92;&#101;&#110;&#100;&#123;&#101;&#113;&#117;&#97;&#116;&#105;&#111;&#110;&#42;&#125;\" title=\"Rendered by QuickLaTeX.com\"\/><\/p>\n<p>\u03b1\u03bb\u03bb\u03ac \u03c4\u03ce\u03c1\u03b1 \u03bc\u03b5 \u03c4\u03bf <span style=\"font-size: 12pt;\">I(h)<\/span> \u03bd\u03b1 \u03b2\u03b1\u03c3\u03af\u03b6\u03b5\u03c4\u03b1\u03b9 \u03c3\u03c4\u03b7\u03bd \u03b5\u03be\u03af\u03c3\u03c9\u03c3\u03b7 (<a href=\"#id4074712244\">11<\/a>).<\/p>\n<p>\u0397 \u03c0\u03c1\u03ce\u03c4\u03b7 \u03c3\u03cd\u03b3\u03ba\u03c1\u03b9\u03c3\u03b7 \u03c0\u03b1\u03c1\u03bf\u03c5\u03c3\u03b9\u03ac\u03b6\u03b5\u03c4\u03b1\u03b9 \u03bc\u03b5 \u03c4\u03b7 \u03bc\u03c0\u03bb\u03b5 \u03b4\u03b9\u03b1\u03ba\u03b5\u03ba\u03bf\u03bc\u03bc\u03ad\u03bd\u03b7 \u03b3\u03c1\u03b1\u03bc\u03bc\u03ae \u03c3\u03c4\u03b7\u03bd <a href=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2018\/10\/Bottle-4-2.jpg\" target=\"_blank\" rel=\"noopener\">\u0395\u03b9\u03ba. 4<\/a>, \u03cc\u03c0\u03bf\u03c5 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03ae\u03c3\u03b1\u03bc\u03b5 \u03c4\u03bf <span style=\"font-size: 12pt;\">h (t)<\/span> \u03c0\u03bf\u03c5 \u03bc\u03b5\u03c4\u03c1\u03ae\u03b8\u03b7\u03ba\u03b5 \u03c3\u03c4\u03bf \u03c0\u03b5\u03af\u03c1\u03b1\u03bc\u03b1. \u03a4\u03b1 \u03af\u03b4\u03b9\u03b1 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03b1 \u03c6\u03b1\u03af\u03bd\u03bf\u03bd\u03c4\u03b1\u03b9 \u03c3\u03c4\u03b7\u03bd <a href=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2018\/10\/Bottle-5-1.jpg\" target=\"_blank\" rel=\"noopener\">\u0395\u03b9\u03ba. 5<\/a>, \u03cc\u03c0\u03bf\u03c5 \u03c3\u03c7\u03b5\u03b4\u03b9\u03ac\u03b6\u03b5\u03c4\u03b1\u03b9\u03b9 \u03c4\u03bf \u03c9 \u03c3\u03b5 \u03c3\u03c7\u03ad\u03c3\u03b7 \u03bc\u03b5 \u03c4\u03bf h. \u03a7\u03c9\u03c1\u03af\u03c2 \u03bf\u03c0\u03bf\u03b9\u03b5\u03c3\u03b4\u03ae\u03c0\u03bf\u03c4\u03b5 \u03c1\u03c5\u03b8\u03bc\u03b9\u03b6\u03cc\u03bc\u03b5\u03bd\u03b5\u03c2 \u03c0\u03b1\u03c1\u03b1\u03bc\u03ad\u03c4\u03c1\u03bf\u03c5\u03c2, \u03c4\u03bf \u03bc\u03bf\u03bd\u03c4\u03ad\u03bb\u03bf \u03b4\u03af\u03bd\u03b5\u03b9 \u03bc\u03b9\u03b1 \u03bb\u03bf\u03b3\u03b9\u03ba\u03ae \u03b5\u03b9\u03ba\u03cc\u03bd\u03b1 \u03c4\u03b7\u03c2 \u03bc\u03b5\u03af\u03c9\u03c3\u03b7\u03c2 \u03c4\u03bf\u03c5 \u03c9 \u03ba\u03b1\u03c4\u03ac \u03c4\u03b7 \u03b4\u03b9\u03ac\u03c1\u03ba\u03b5\u03b9\u03b1 \u03c4\u03b7\u03c2 \u03c0\u03b5\u03c1\u03b9\u03c3\u03c4\u03c1\u03bf\u03c6\u03ae\u03c2 \u03c4\u03b7\u03c2 \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2 \u03bd\u03b5\u03c1\u03bf\u03cd, \u03b5\u03b9\u03b4\u03b9\u03ba\u03ac \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03b7\u03c2 \u03c4\u03b7\u03c2 \u03c5\u03c0\u03b5\u03c1\u03b1\u03c0\u03bb\u03bf\u03cd\u03c3\u03c4\u03b5\u03c5\u03c3\u03b7\u03c2 \u03c4\u03bf\u03c5 \u03ba\u03b9\u03bd\u03bf\u03cd\u03bd\u03b5\u03bd\u03bf\u03c5 \u03bd\u03b5\u03c1\u03bf\u03cd \u03c3\u03b5 \u03b1\u03c5\u03c4\u03ae\u03bd \u03c4\u03b7\u03bd \u03bc\u03bf\u03bd\u03bf\u03b4\u03b9\u03ac\u03c3\u03c4\u03b1\u03c4\u03b7 \u03c0\u03b5\u03c1\u03b9\u03b3\u03c1\u03b1\u03c6\u03ae. \u039f\u03c1\u03b9\u03c3\u03bc\u03ad\u03bd\u03b1 \u03b1\u03c0\u03cc \u03c4\u03b1 \u03c7\u03b1\u03c1\u03b1\u03ba\u03c4\u03b7\u03c1\u03b9\u03c3\u03c4\u03b9\u03ba\u03ac, \u03cc\u03c0\u03c9\u03c2 \u03b7 \u03b5\u03bc\u03c6\u03ac\u03bd\u03b9\u03c3\u03b7 \u03b5\u03bd\u03cc\u03c2 \u03c3\u03b7\u03bc\u03b5\u03af\u03bf\u03c5 \u03ba\u03b1\u03bc\u03c0\u03ae\u03c2 \u03ba\u03b1\u03c4\u03ac \u03c4\u03bf \u03ae\u03bc\u03b9\u03c3\u03c5 \u03c4\u03b7\u03c2 \u03b4\u03b9\u03b1\u03b4\u03c1\u03bf\u03bc\u03ae\u03c2, \u03b4\u03b5\u03bd \u03ba\u03b1\u03c4\u03b1\u03b3\u03c1\u03ac\u03c6\u03bf\u03bd\u03c4\u03b1\u03b9, \u03b3\u03b5\u03b3\u03bf\u03bd\u03cc\u03c2 \u03c0\u03bf\u03c5 \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03bd\u03b1 \u03bf\u03c6\u03b5\u03af\u03bb\u03b5\u03c4\u03b1\u03b9 \u03c3\u03c4\u03bf \u03b3\u03b5\u03b3\u03bf\u03bd\u03cc\u03c2 \u03cc\u03c4\u03b9 \u03b7 \u03bc\u03ac\u03b6\u03b1 \u03b4\u03b5\u03bd \u03c0\u03b1\u03c1\u03b1\u03bc\u03ad\u03bd\u03b5\u03b9 \u03ba\u03b1\u03c4\u03b1\u03bd\u03b5\u03bc\u03b7\u03bc\u03ad\u03bd\u03b7 \u03ba\u03b1\u03c4\u03ac \u03bc\u03ae\u03ba\u03bf\u03c2 \u03c4\u03bf\u03c5 \u03ba\u03b5\u03bd\u03c4\u03c1\u03b9\u03ba\u03bf\u03cd \u03ac\u03be\u03bf\u03bd\u03b1 \u03c4\u03b7\u03c2 \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2.<\/p>\n<h2><span style=\"color: #0000ff;\"><strong>IV. \u039c\u03a0\u039f\u03a1\u039f\u03a5\u039c\u0395 \u039d\u0391 \u03a0\u03a1\u039f\u0392\u039b\u0395\u03a8\u039f\u03a5\u039c\u0395 \u03a4\u039f \u0392\u0395\u039b\u03a4\u0399\u03a3\u03a4\u039f \u039a\u039b\u0391\u03a3\u039c\u0391 \u03a0\u039b\u0397\u03a1\u03a9\u03a3\u0397\u03a3;<\/strong><\/span><\/h2>\n<p>\u0395\u03bd\u03b8\u03b1\u03c1\u03c1\u03c5\u03bc\u03ad\u03bd\u03bf\u03b9 \u03b1\u03c0\u03cc \u03b1\u03c5\u03c4\u03ad\u03c2 \u03c4\u03b9\u03c2 \u03c0\u03b1\u03c1\u03b1\u03c4\u03b7\u03c1\u03ae\u03c3\u03b5\u03b9\u03c2, \u03c4\u03ce\u03c1\u03b1 \u03b1\u03c2 \u03c3\u03c4\u03c1\u03b1\u03c6\u03bf\u03cd\u03bc\u03b5 \u03c3\u03c4\u03bf \u03b5\u03c1\u03ce\u03c4\u03b7\u03bc\u03b1 \u03c0\u03bf\u03b9\u03bf \u03b5\u03af\u03bd\u03b1\u03b9 \u03c4\u03bf \u03b2\u03ad\u03bb\u03c4\u03b9\u03c3\u03c4\u03bf \u03ba\u03bb\u03ac\u03c3\u03bc\u03b1 \u03c0\u03bb\u03ae\u03c1\u03c9\u03c3\u03b7\u03c2,<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/viewonphysics.gr\/wp-content\/ql-cache\/quicklatex.com-0e9a3ca3038f98b068978058d079578e_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"&#102;&#32;&#61;&#32;&#104;&#95;&#48;&#32;&#47;&#32;&#72;&#32;\" title=\"Rendered by QuickLaTeX.com\" height=\"18\" width=\"77\" style=\"vertical-align: -5px;\"\/>, \u03b3\u03b9\u03b1 \u03bd\u03b1 \u03bf\u03bb\u03bf\u03ba\u03bb\u03b7\u03c1\u03ce\u03c3\u03bf\u03c5\u03bc\u03b5 \u03bc\u03b5 \u03b5\u03c0\u03b9\u03c4\u03c5\u03c7\u03af\u03b1 \u03ad\u03bd\u03b1 \u03c0\u03ad\u03c4\u03b1\u03b3\u03bc\u03b1 \u03c4\u03b7\u03c2 \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2 \u03bd\u03b5\u03c1\u03bf\u03cd. \u0395\u03af\u03bd\u03b1\u03b9 \u03c0\u03c1\u03bf\u03c6\u03b1\u03bd\u03ad\u03c2 \u03cc\u03c4\u03b9 \u03c0\u03c1\u03ad\u03c0\u03b5\u03b9 \u03bd\u03b1 \u03c5\u03c0\u03ac\u03c1\u03c7\u03b5\u03b9 \u03b1\u03c5\u03c4\u03cc \u03c4\u03bf \u03b2\u03ad\u03bb\u03c4\u03b9\u03c3\u03c4\u03bf \u03ba\u03bb\u03ac\u03c3\u03bc\u03b1. \u0394\u03b7\u03bb\u03b1\u03b4\u03ae, \u03c4\u03cc\u03c3\u03bf \u03b7 \u03ba\u03b5\u03bd\u03ae \u03c6\u03b9\u03ac\u03bb\u03b7 (f = 0) \u03cc\u03c3\u03bf \u03ba\u03b1\u03b9 \u03b7 \u03b3\u03b5\u03bc\u03ac\u03c4\u03b7 \u03c6\u03b9\u03ac\u03bb\u03b7 (f = 1) \u03b4\u03b5\u03bd \u03bc\u03c0\u03bf\u03c1\u03bf\u03cd\u03bd \u03bd\u03b1 \u03b9\u03ba\u03b1\u03bd\u03bf\u03c0\u03bf\u03b9\u03ae\u03c3\u03bf\u03c5\u03bd \u03bf\u03c0\u03bf\u03b9\u03b1\u03b4\u03ae\u03c0\u03bf\u03c4\u03b5 \u03b1\u03bd\u03b1\u03ba\u03b1\u03c4\u03b1\u03bd\u03bf\u03bc\u03ae \u03bc\u03ac\u03b6\u03b1\u03c2 \u03ba\u03b1\u03b9 \u03b5\u03c0\u03bf\u03bc\u03ad\u03bd\u03c9\u03c2 \u03b4\u03b5\u03bd \u03b8\u03b1 \u03c0\u03b1\u03c1\u03bf\u03c5\u03c3\u03b9\u03ac\u03c3\u03bf\u03c5\u03bd \u03b5\u03c0\u03b9\u03b2\u03c1\u03ac\u03b4\u03c5\u03bd\u03c3\u03b7 \u03c9. \u03a3\u03cd\u03bc\u03c6\u03c9\u03bd\u03b1 \u03bc\u03b5 \u03c4\u03bf \u03bc\u03bf\u03bd\u03c4\u03ad\u03bb\u03bf, \u03c0\u03bf\u03b9\u03bf \u03b8\u03b1 \u03ae\u03c4\u03b1\u03bd \u03c4\u03bf \u03b2\u03ad\u03bb\u03c4\u03b9\u03c3\u03c4\u03bf f;<\/p>\n<h3><span style=\"color: #0000ff;\"><strong>\u0391. \u039c\u03b5\u03af\u03c9\u03c3\u03b7 \u03c4\u03b7\u03c2 \u03b3\u03c9\u03bd\u03b9\u03b1\u03ba\u03ae\u03c2 \u03c4\u03b1\u03c7\u03cd\u03c4\u03b7\u03c4\u03b1\u03c2<\/strong><\/span><\/h3>\n<p>\u0395\u03c0\u03b5\u03b9\u03b4\u03ae \u03b3\u03b9\u03b1 \u03ad\u03bd\u03b1 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03bf <span style=\"font-size: 12pt;\">\u03c9<sub>0<\/sub> <\/span>\u03ba\u03ac\u03c0\u03bf\u03b9\u03bf\u03c2 \u03b5\u03c0\u03b9\u03b8\u03c5\u03bc\u03b5\u03af \u03bd\u03b1 \u03bc\u03b5\u03b9\u03ce\u03c3\u03b5\u03b9 \u03c9 \u03cc\u03c3\u03bf \u03c4\u03bf \u03b4\u03c5\u03bd\u03b1\u03c4\u03cc\u03bd \u03c0\u03b5\u03c1\u03b9\u03c3\u03c3\u03cc\u03c4\u03b5\u03c1\u03bf, \u03b8\u03b1 \u03c8\u03ac\u03be\u03bf\u03c5\u03bc\u03b5 \u03b3\u03b9\u03b1 \u03c4\u03bf \u03b5\u03bb\u03ac\u03c7\u03b9\u03c3\u03c4\u03bf \u03c4\u03bf\u03c5 \u03bb\u03cc\u03b3\u03bf\u03c5 <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/viewonphysics.gr\/wp-content\/ql-cache\/quicklatex.com-54568442cfe8bef6da25b74dff3b643a_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"&#73;&#95;&#48;&#32;&#47;&#32;&#73;&#32;&#40;&#104;&#41;\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"57\" style=\"vertical-align: -5px;\"\/>. \u0393\u03b9\u03b1 \u03ba\u03ac\u03b8\u03b5 \u03ba\u03bb\u03ac\u03c3\u03bc\u03b1 \u03c0\u03bb\u03ae\u03c1\u03c9\u03c3\u03b7\u03c2, \u03b5\u03c0\u03b9\u03c4\u03c5\u03b3\u03c7\u03ac\u03bd\u03b5\u03c4\u03b1\u03b9 \u03b7 \u03bc\u03ad\u03b3\u03b9\u03c3\u03c4\u03b7 \u03c1\u03bf\u03c0\u03ae \u03b1\u03b4\u03c1\u03ac\u03bd\u03b5\u03b9\u03b1\u03c2 <span style=\"font-size: 12pt;\">I<sub>max<\/sub><\/span> \u03cc\u03c4\u03b1\u03bd \u03c4\u03bf \u03bd\u03b5\u03c1\u03cc \u03b5\u03af\u03bd\u03b1\u03b9 \u03ba\u03b1\u03c4\u03b1\u03bd\u03b5\u03bc\u03b7\u03bc\u03ad\u03bd\u03bf \u03ba\u03b1\u03c4\u03ac \u03c4\u03bf \u03bc\u03ad\u03b3\u03b9\u03c3\u03c4\u03bf, \u03b4\u03b7\u03bb. \u0393\u03b9\u03b1 \u03c4\u03bf <span style=\"font-size: 12pt;\">h = H<\/span>. \u03a3\u03c5\u03bd\u03b5\u03c0\u03ce\u03c2, \u03c0\u03c1\u03ad\u03c0\u03b5\u03b9 \u03bd\u03b1 \u03b2\u03c1\u03bf\u03cd\u03bc\u03b5 \u03c4\u03b7\u03bd \u03c4\u03b9\u03bc\u03ae <span style=\"font-size: 12pt;\">f<\/span> \u03b3\u03b9\u03b1 \u03c4\u03b7\u03bd \u03bf\u03c0\u03bf\u03af\u03b1 \u03c4\u03bf <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/viewonphysics.gr\/wp-content\/ql-cache\/quicklatex.com-abe5129efea0de0b006cabd759644cc7_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"&#73;&#95;&#48;&#32;&#47;&#32;&#73;&#95;&#123;&#109;&#97;&#120;&#125;\" title=\"Rendered by QuickLaTeX.com\" height=\"18\" width=\"59\" style=\"vertical-align: -5px;\"\/> \u03b5\u03c0\u03b9\u03c4\u03c5\u03b3\u03c7\u03ac\u03bd\u03b5\u03b9 \u03ad\u03bd\u03b1 \u03b5\u03bb\u03ac\u03c7\u03b9\u03c3\u03c4\u03bf. \u0391\u03bd \u03ba\u03b1\u03b9 \u03b7 \u03ad\u03ba\u03c6\u03c1\u03b1\u03c3\u03b7 \u03c3\u03c4\u03b7\u03bd \u03b5\u03be. (<a href=\"#id4074712244\">11<\/a>) \u03c6\u03b1\u03af\u03bd\u03b5\u03c4\u03b1\u03b9 \u03bc\u03ac\u03bb\u03bb\u03bf\u03bd \u03b4\u03c5\u03c3\u03ba\u03af\u03bd\u03b7\u03c4\u03b7, \u03b5\u03af\u03bd\u03b1\u03b9 \u03b4\u03c5\u03bd\u03b1\u03c4\u03cc\u03bd \u03bd\u03b1 \u03b2\u03c1\u03b5\u03b8\u03b5\u03af \u03bc\u03af\u03b1 \u03b1\u03bd\u03b1\u03bb\u03c5\u03c4\u03b9\u03ba\u03ae \u03bc\u03bf\u03c1\u03c6\u03ae \u03b3\u03b9\u03b1 \u03c4\u03b7 \u03c3\u03c5\u03bd\u03ac\u03c1\u03c4\u03b7\u03c3\u03b7 <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/viewonphysics.gr\/wp-content\/ql-cache\/quicklatex.com-c5c08fb679133a54ba372a7e8ed890c2_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"&#71;&#32;&#40;&#102;&#41;&#32;&#92;&#101;&#113;&#117;&#105;&#118;&#32;&#73;&#95;&#48;&#32;&#47;&#32;&#73;&#95;&#123;&#109;&#97;&#120;&#125;\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"121\" style=\"vertical-align: -5px;\"\/>. \u0393\u03b9 &#8216;\u03b1\u03c5\u03c4\u03cc, \u03ba\u03b1\u03b8\u03bf\u03c1\u03af\u03b6\u03bf\u03c5\u03bc\u03b5 \u03c0\u03c1\u03ce\u03c4\u03b1 \u03c4\u03b7\u03bd \u03b1\u03bd\u03b1\u03bb\u03bf\u03b3\u03af\u03b1 \u03bc\u03ac\u03b6\u03b1\u03c2<\/p>\n<p><a name=\"id4283549213\"><\/a><\/p>\n<p class=\"ql-center-displayed-equation\" style=\"line-height: 35px;\"><span class=\"ql-right-eqno\"> (13) <\/span><span class=\"ql-left-eqno\"> &nbsp; <\/span><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/viewonphysics.gr\/wp-content\/ql-cache\/quicklatex.com-4670292fa7853379721adaaf96c3a003_l3.png\" height=\"35\" width=\"109\" class=\"ql-img-displayed-equation quicklatex-auto-format\" alt=\"&#92;&#98;&#101;&#103;&#105;&#110;&#123;&#101;&#113;&#117;&#97;&#116;&#105;&#111;&#110;&#42;&#125;&#32;&#32; &#77;&#61;&#92;&#102;&#114;&#97;&#99;&#123;&#109;&#95;&#123;&#119;&#44;&#109;&#97;&#120;&#125;&#125;&#123;&#109;&#95;&#98;&#125;&#44; &#92;&#101;&#110;&#100;&#123;&#101;&#113;&#117;&#97;&#116;&#105;&#111;&#110;&#42;&#125;\" title=\"Rendered by QuickLaTeX.com\"\/><\/p>\n<p>\u03cc\u03c0\u03bf\u03c5, <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/viewonphysics.gr\/wp-content\/ql-cache\/quicklatex.com-03ea41ac0d7f5b701781017660e8d45e_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"&#109;&#95;&#123;&#119;&#44;&#109;&#97;&#120;&#125;\" title=\"Rendered by QuickLaTeX.com\" height=\"14\" width=\"57\" style=\"vertical-align: -6px;\"\/> \u03b5\u03af\u03bd\u03b1\u03b9 \u03b7 \u03bc\u03ac\u03b6\u03b1 \u03c4\u03bf\u03c5 \u03bd\u03b5\u03c1\u03bf\u03cd \u03c0\u03bf\u03c5 \u03b3\u03b5\u03bc\u03af\u03b6\u03b5\u03b9 \u03c4\u03b7 \u03c6\u03b9\u03ac\u03bb\u03b7. \u039c\u03b5 \u03b1\u03c5\u03c4\u03ae \u03bc\u03c0\u03bf\u03c1\u03bf\u03cd\u03bc\u03b5 \u03bd\u03b1 \u03b5\u03ba\u03c6\u03c1\u03ac\u03c3\u03bf\u03c5\u03bc\u03b5 <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/viewonphysics.gr\/wp-content\/ql-cache\/quicklatex.com-a77a656b71a20b51f4ac30e70ccab52f_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"&#109;&#95;&#119;&#61;&#102;&#109;&#95;&#123;&#119;&#44;&#109;&#97;&#120;&#125;&#61;&#102;&#77;&#109;&#95;&#98;\" title=\"Rendered by QuickLaTeX.com\" height=\"18\" width=\"194\" style=\"vertical-align: -6px;\"\/> \u03ba\u03b1\u03b9 \u03bd\u03b1 \u03c4\u03bf \u03b8\u03ad\u03c3\u03bf\u03c5\u03bc\u03b5 \u03c3\u03c4\u03b7\u03bd \u03b5\u03be. (<a href=\"#id4074712244\">11<\/a>) \u03ba\u03b1\u03b9 (<a href=\"#id2842355781\">8<\/a>). \u039c\u03b5 \u03c4\u03b7 \u03b2\u03bf\u03ae\u03b8\u03b5\u03b9\u03b1 \u03c4\u03c9\u03bd \u03c0\u03c1\u03bf\u03b3\u03c1\u03b1\u03bc\u03bc\u03ac\u03c4\u03c9\u03bd Maple \u03ae Mathematica, \u03bf\u03b9 \u03c0\u03c1\u03bf\u03ba\u03cd\u03c0\u03c4\u03bf\u03c5\u03c3\u03b5\u03c2 \u03b5\u03ba\u03c6\u03c1\u03ac\u03c3\u03b5\u03b9\u03c2 \u03bf\u03b4\u03b7\u03b3\u03bf\u03cd\u03bd\u03c4\u03b1\u03b9 \u03c3\u03c4\u03b9\u03c2 \u03c3\u03c7\u03ad\u03c3\u03b5\u03b9\u03c2:<\/p>\n<p><a name=\"id3490288798\"><\/a><\/p>\n<p class=\"ql-center-displayed-equation\" style=\"line-height: 43px;\"><span class=\"ql-right-eqno\"> (14) <\/span><span class=\"ql-left-eqno\"> &nbsp; <\/span><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/viewonphysics.gr\/wp-content\/ql-cache\/quicklatex.com-16596c29f3c350d5a5daabee7b875cba_l3.png\" height=\"43\" width=\"402\" class=\"ql-img-displayed-equation quicklatex-auto-format\" alt=\"&#92;&#98;&#101;&#103;&#105;&#110;&#123;&#101;&#113;&#117;&#97;&#116;&#105;&#111;&#110;&#42;&#125;&#32;&#32; &#71;&#32;&#92;&#108;&#101;&#102;&#116;&#32;&#40;&#102;&#32;&#92;&#114;&#105;&#103;&#104;&#116;&#32;&#41;&#61;&#92;&#102;&#114;&#97;&#99;&#123;&#73;&#95;&#48;&#125;&#123;&#73;&#95;&#123;&#109;&#97;&#120;&#125;&#125;&#61;&#92;&#102;&#114;&#97;&#99;&#123;&#77;&#94;&#50;&#102;&#94;&#52;&#43;&#52;&#77;&#102;&#94;&#51;&#45;&#54;&#77;&#102;&#94;&#50;&#43;&#52;&#77;&#102;&#43;&#49;&#125;&#123;&#40;&#49;&#43;&#77;&#102;&#41;&#94;&#50;&#125; &#92;&#101;&#110;&#100;&#123;&#101;&#113;&#117;&#97;&#116;&#105;&#111;&#110;&#42;&#125;\" title=\"Rendered by QuickLaTeX.com\"\/><\/p>\n<p>\u0391\u03c5\u03c4\u03ae \u03b7 \u03c3\u03c7\u03ad\u03c3\u03b7 \u03b1\u03c0\u03b5\u03b9\u03ba\u03bf\u03bd\u03af\u03b6\u03b5\u03c4\u03b1\u03b9 \u03c3\u03c4\u03b7\u03bd <a href=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2018\/10\/Bottle-6.jpg\" target=\"_blank\" rel=\"noopener\">\u0395\u03b9\u03ba. 6<\/a> \u03bc\u03b5 \u03c4\u03b7\u03bd \u03ba\u03b1\u03bc\u03c0\u03cd\u03bb\u03b7 \u03c0\u03c1\u03bf\u03c2 \u03c4\u03b1 \u03b4\u03b5\u03be\u03b9\u03ac (\u03b7 \u03bc\u03c0\u03bb\u03b5) \u03b3\u03b9\u03b1 \u039c = 20. \u03a4\u03c5\u03c0\u03b9\u03ba\u03ac, \u03bf\u03b9 \u03c6\u03b9\u03ac\u03bb\u03b5\u03c2 \u03bd\u03b5\u03c1\u03bf\u03cd \u03c0\u03bf\u03c5 \u03bc\u03c0\u03bf\u03c1\u03bf\u03cd\u03bd \u03bd\u03b1 \u03c0\u03b5\u03c1\u03b9\u03ad\u03c7\u03bf\u03c5\u03bd 0,5l \u03bd\u03b5\u03c1\u03bf\u03cd \u03ad\u03c7\u03bf\u03c5\u03bd \u03bc\u03ac\u03b6\u03b1 \u03c0\u03b5\u03c1\u03af\u03c0\u03bf\u03c5 25g. \u0391\u03c5\u03c4\u03cc \u03c3\u03b7\u03bc\u03b1\u03af\u03bd\u03b5\u03b9 M = 500\/25 = 20, \u03b3\u03b9\u03b1 \u03c4\u03bf \u03bf\u03c0\u03bf\u03af\u03bf \u03c4\u03bf <span style=\"font-size: 12pt;\">G (f)<\/span> \u03c0\u03b1\u03c1\u03bf\u03c5\u03c3\u03b9\u03ac\u03b6\u03b5\u03b9 \u03ad\u03bd\u03b1 \u03b5\u03bb\u03ac\u03c7\u03b9\u03c3\u03c4\u03bf \u03c3\u03c4\u03bf <span style=\"font-size: 12pt;\">f \u2248 0,41<\/span>. \u0397 \u03b1\u03bd\u03c4\u03af\u03c3\u03c4\u03bf\u03b9\u03c7\u03b7 \u03bc\u03b5\u03af\u03c9\u03c3\u03b7 \u03b5\u03af\u03bd\u03b1\u03b9 <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/viewonphysics.gr\/wp-content\/ql-cache\/quicklatex.com-9de7ef1a0bfe3a9a85055b3ac1dec058_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"&#92;&#111;&#109;&#101;&#103;&#97;&#95;&#123;&#109;&#105;&#110;&#125;&#32;&#47;&#92;&#111;&#109;&#101;&#103;&#97;&#95;&#48;&#32;&#92;&#97;&#112;&#112;&#114;&#111;&#120;&#32;&#48;&#44;&#51;&#54;\" title=\"Rendered by QuickLaTeX.com\" height=\"18\" width=\"123\" style=\"vertical-align: -5px;\"\/>, \u03b7 \u03bf\u03c0\u03bf\u03af\u03b1 \u03c0\u03b1\u03c1\u03b1\u03c4\u03b7\u03c1\u03bf\u03cd\u03bc\u03b5 \u03cc\u03c4\u03b9 \u03c3\u03c5\u03bc\u03c6\u03c9\u03bd\u03b5\u03af \u03c3\u03c4\u03b5\u03bd\u03ac \u03bc\u03b5 \u03c4\u03b7 \u03bc\u03b5\u03af\u03c9\u03c3\u03b7 \u03c0\u03bf\u03c5 \u03b5\u03c0\u03b9\u03c4\u03c5\u03b3\u03c7\u03ac\u03bd\u03b5\u03c4\u03b1\u03b9 \u03c0\u03b5\u03b9\u03c1\u03b1\u03bc\u03b1\u03c4\u03b9\u03ba\u03ac \u03c3\u03c4\u03b7\u03bd <a href=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2018\/10\/Bottle-4-2.jpg\" target=\"_blank\" rel=\"noopener\">\u0395\u03b9\u03ba 4<\/a> (\u03c3\u03c4\u03b1 \u03c0\u03b5\u03b9\u03c1\u03ac\u03bc\u03b1\u03c4\u03ac \u03bc\u03b1\u03c2 f = 0,39).<\/p>\n<div id=\"attachment_6834\" style=\"width: 435px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-6834\" class=\"wp-image-6834\" src=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2018\/10\/Bottle-6-300x190.jpg\" alt=\"\" width=\"425\" height=\"269\" srcset=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2018\/10\/Bottle-6-300x190.jpg 300w, https:\/\/viewonphysics.gr\/wp-content\/uploads\/2018\/10\/Bottle-6.jpg 500w\" sizes=\"auto, (max-width: 425px) 100vw, 425px\" \/><p id=\"caption-attachment-6834\" class=\"wp-caption-text\">\u0395\u03b9\u03ba. 6. \u0394\u03af\u03b4\u03bf\u03bd\u03c4\u03b1\u03b9 \u03b4\u03cd\u03bf \u03ba\u03c1\u03b9\u03c4\u03ae\u03c1\u03b9\u03b1 \u03b3\u03b9\u03b1 \u03c4\u03bf \u03b2\u03ad\u03bb\u03c4\u03b9\u03c3\u03c4\u03bf \u03c0\u03ad\u03c4\u03b1\u03b3\u03bc\u03b1. \u03a3\u03c4\u03bf\u03bd \u03b1\u03c1\u03b9\u03c3\u03c4\u03b5\u03c1\u03cc \u03ac\u03be\u03bf\u03bd\u03b1 y, \u03c4\u03bf G (f) \u03b1\u03c0\u03b5\u03b9\u03ba\u03bf\u03bd\u03af\u03b6\u03b5\u03c4\u03b1\u03b9 \u03c9\u03c2 \u03b4\u03b9\u03b1\u03ba\u03b5\u03ba\u03bf\u03bc\u03bc\u03ad\u03bd\u03b7 \u03b3\u03c1\u03b1\u03bc\u03bc\u03ae. \u0397 \u03b5\u03bb\u03ac\u03c7\u03b9\u03c3\u03c4\u03b7 \u03c4\u03b9\u03bc\u03ae \u03c4\u03bf\u03c5 (\u03b4\u03b7\u03bb\u03b1\u03b4\u03ae \u03b7 \u03bc\u03ad\u03b3\u03b9\u03c3\u03c4\u03b7 \u03c1\u03bf\u03c0\u03ae \u03b1\u03b4\u03c1\u03ac\u03bd\u03b5\u03b9\u03b1\u03c2 \u03b1\u03c5\u03be\u03ac\u03bd\u03b5\u03c4\u03b1\u03b9 \u03c3\u03b5 I \/ I<sub>0<\/sub>) \u03bc\u03b1\u03c2 \u03b4\u03af\u03bd\u03b5\u03b9 \u03c4\u03bf \u03c0\u03c1\u03ce\u03c4\u03bf \u03ba\u03c1\u03b9\u03c4\u03ae\u03c1\u03b9\u03bf \u03b3\u03b9\u03b1 \u03ad\u03bd\u03b1 \u03b2\u03ad\u03bb\u03c4\u03b9\u03c3\u03c4\u03bf \u03ba\u03bb\u03ac\u03c3\u03bc\u03b1 f \u03c0\u03bb\u03ae\u03c1\u03c9\u03c3\u03b7\u03c2 \u03c4\u03b7\u03c2 \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2. \u03a3\u03c4\u03bf\u03bd \u03b4\u03b5\u03be\u03b9\u03cc \u03ac\u03be\u03bf\u03bd\u03b1 y, \u03b7 \u03c7\u03b1\u03bc\u03b7\u03bb\u03cc\u03c4\u03b5\u03c1\u03b7 \u03b5\u03c0\u03b9\u03c4\u03b5\u03cd\u03be\u03b9\u03bc\u03b7 \u03b8\u03ad\u03c3\u03b7 \u03c4\u03bf\u03c5 \u03ba\u03ad\u03bd\u03c4\u03c1\u03bf\u03c5 \u03bc\u03ac\u03b6\u03b1\u03c2 h<sub>cm<\/sub> \/ H, \u03b5\u03af\u03bd\u03b1\u03b9 \u03c3\u03c7\u03b5\u03b4\u03b9\u03b1\u03c3\u03bc\u03ad\u03bd\u03b7 \u03c9\u03c2 \u03c3\u03c5\u03bd\u03b5\u03c7\u03ae\u03c2 \u03b3\u03c1\u03b1\u03bc\u03bc\u03ae, \u03bc\u03b1\u03c2 \u03b4\u03af\u03bd\u03b5\u03b9 \u03ad\u03bd\u03b1 \u03ac\u03bb\u03bb\u03bf \u03ba\u03c1\u03b9\u03c4\u03ae\u03c1\u03b9\u03bf \u03b3\u03b9\u03b1 \u03ad\u03bd\u03b1 \u03b2\u03ad\u03bb\u03c4\u03b9\u03c3\u03c4\u03bf \u03c0\u03ad\u03c4\u03b1\u03b3\u03bc\u03b1. \u0397 \u03b3\u03c1\u03b1\u03c6\u03b9\u03ba\u03ae \u03c0\u03b1\u03c1\u03ac\u03c3\u03c4\u03b1\u03c3\u03b7 \u03b4\u03b5\u03af\u03c7\u03bd\u03b5\u03b9 \u03c4\u03b7\u03bd \u03b1\u03bd\u03b1\u03bb\u03bf\u03b3\u03af\u03b1 \u03bc\u03ac\u03b6\u03b1\u03c2 \u03bd\u03b5\u03c1\u03bf\u03cd \/ \u03bc\u03ac\u03b6\u03b1 \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2, M = m<sub>water max<\/sub> \/ m<sub>bottle<\/sub> = 20.<\/p><\/div>\n<h3><span style=\"color: #0000ff;\"><strong>\u0392. \u03a7\u03b1\u03bc\u03b7\u03bb\u03ce\u03bd\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c4\u03bf \u03ba\u03ad\u03bd\u03c4\u03c1\u03bf \u03bc\u03ac\u03b6\u03b1\u03c2<\/strong><\/span><\/h3>\n<p>\u039c\u03c0\u03bf\u03c1\u03bf\u03cd\u03bc\u03b5 \u03bd\u03b1 \u03c5\u03c0\u03bf\u03c3\u03c4\u03b7\u03c1\u03af\u03be\u03bf\u03c5\u03bc\u03b5 \u03cc\u03c4\u03b9 \u03b7 \u03b2\u03b5\u03bb\u03c4\u03b9\u03c3\u03c4\u03bf\u03c0\u03bf\u03af\u03b7\u03c3\u03b7 \u03b1\u03c6\u03bf\u03c1\u03ac \u03c3\u03b5 \u03ba\u03ac\u03c4\u03b9 \u03c0\u03b5\u03c1\u03b9\u03c3\u03c3\u03cc\u03c4\u03b5\u03c1\u03bf \u03b1\u03c0\u03cc \u03c4\u03b7 \u03bc\u03b5\u03af\u03c9\u03c3\u03b7 \u03c4\u03bf\u03c5 \u03c9. \u0395\u03be\u03ac\u03bb\u03bb\u03bf\u03c5, \u03b7 \u03b4\u03c5\u03bd\u03b1\u03bc\u03b9\u03ba\u03ae \u03c4\u03b7\u03c2 \u03c0\u03c1\u03bf\u03c3\u03b3\u03b5\u03af\u03c9\u03c3\u03b7\u03c2 \u03ad\u03c7\u03b5\u03b9 \u03b5\u03c0\u03af\u03c3\u03b7\u03c2 \u03ba\u03b1\u03af\u03c1\u03b9\u03b1 \u03c3\u03b7\u03bc\u03b1\u03c3\u03af\u03b1. \u03a3\u03b1\u03c6\u03ce\u03c2, \u03b7 \u03c3\u03c4\u03b1\u03b8\u03b5\u03c1\u03cc\u03c4\u03b7\u03c4\u03b1 \u03c4\u03b7\u03c2 \u03c0\u03c1\u03bf\u03c3\u03b3\u03b5\u03af\u03c9\u03c3\u03b7\u03c2 \u03b8\u03b1 \u03c9\u03c6\u03b5\u03bb\u03b7\u03b8\u03b5\u03af \u03b1\u03c0\u03cc \u03c4\u03bf \u03bd\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 \u03c4\u03bf \u03ba\u03ad\u03bd\u03c4\u03c1\u03bf \u03c4\u03b7\u03c2 \u03bc\u03ac\u03b6\u03b1\u03c2 \u03cc\u03c3\u03bf \u03c4\u03bf \u03b4\u03c5\u03bd\u03b1\u03c4\u03cc\u03bd \u03c7\u03b1\u03bc\u03b7\u03bb\u03cc\u03c4\u03b5\u03c1\u03b1. \u039c\u03b9\u03b1 \u03ac\u03bb\u03bb\u03b7 \u03c3\u03c7\u03b5\u03c4\u03b9\u03ba\u03ae \u03b5\u03bb\u03b1\u03c7\u03b9\u03c3\u03c4\u03bf\u03c0\u03bf\u03af\u03b7\u03c3\u03b7 \u03b8\u03b1 \u03ae\u03c4\u03b1\u03bd \u03c3\u03c5\u03bd\u03b5\u03c0\u03ce\u03c2 \u03c4\u03bf\u03c5<span style=\"font-size: 12pt;\"> h<sub>CM<\/sub><\/span> \u03c5\u03c0\u03bf\u03bb\u03bf\u03b3\u03b9\u03c3\u03bc\u03ad\u03bd\u03bf\u03c5 \u03b3\u03b9\u03b1 <span style=\"font-size: 12pt;\">h = h<sub>0<\/sub><\/span>. \u039a\u03b1\u03b9 \u03c0\u03ac\u03bb\u03b9, \u03bc\u03b5 \u03c4\u03b7\u03bd \u03b1\u03bd\u03b1\u03bb\u03bf\u03b3\u03af\u03b1 \u03bc\u03ac\u03b6\u03b1\u03c2 \u039c, \u03b7 \u03ad\u03ba\u03c6\u03c1\u03b1\u03c3\u03b7 \u03c3\u03c4\u03b7\u03bd \u0395\u03be. (<a href=\"#id2842355781\">8<\/a>) \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03bd\u03b1 \u03b3\u03c1\u03b1\u03c6\u03c4\u03b5\u03af \u03c9\u03c2<\/p>\n<p><a name=\"id1902175812\"><\/a><\/p>\n<p class=\"ql-center-displayed-equation\" style=\"line-height: 44px;\"><span class=\"ql-right-eqno\"> (15) <\/span><span class=\"ql-left-eqno\"> &nbsp; <\/span><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/viewonphysics.gr\/wp-content\/ql-cache\/quicklatex.com-90e958d6726b96cc8e45ee0b3867c60a_l3.png\" height=\"44\" width=\"173\" class=\"ql-img-displayed-equation quicklatex-auto-format\" alt=\"&#92;&#98;&#101;&#103;&#105;&#110;&#123;&#101;&#113;&#117;&#97;&#116;&#105;&#111;&#110;&#42;&#125;&#32;&#32; &#92;&#102;&#114;&#97;&#99;&#123;&#104;&#95;&#123;&#67;&#77;&#125;&#125;&#123;&#72;&#125;&#61;&#92;&#102;&#114;&#97;&#99;&#123;&#49;&#125;&#123;&#50;&#125;&#32;&#92;&#108;&#101;&#102;&#116;&#32;&#40;&#32;&#92;&#102;&#114;&#97;&#99;&#123;&#49;&#43;&#77;&#102;&#94;&#50;&#125;&#123;&#49;&#43;&#77;&#102;&#125;&#32;&#92;&#114;&#105;&#103;&#104;&#116;&#32;&#41; &#92;&#101;&#110;&#100;&#123;&#101;&#113;&#117;&#97;&#116;&#105;&#111;&#110;&#42;&#125;\" title=\"Rendered by QuickLaTeX.com\"\/><\/p>\n<p>\u0391\u03c5\u03c4\u03cc \u03c4\u03bf \u03b1\u03c0\u03bf\u03c4\u03ad\u03bb\u03b5\u03c3\u03bc\u03b1 \u03c6\u03b1\u03af\u03bd\u03b5\u03c4\u03b1\u03b9 \u03c3\u03c4\u03b7\u03bd <a href=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2018\/10\/Bottle-6.jpg\" target=\"_blank\" rel=\"noopener\">\u0395\u03b9\u03ba. 6<\/a> (\u03ba\u03cc\u03ba\u03ba\u03b9\u03bd\u03b7 \u03ba\u03b1\u03bc\u03c0\u03cd\u03bb\u03b7), \u03c0\u03ac\u03bb\u03b9 \u03b3\u03b9\u03b1 \u039c=20. \u03a4\u03ce\u03c1\u03b1 \u03b7 \u03b5\u03bb\u03b1\u03c7\u03b9\u03c3\u03c4\u03bf\u03c0\u03bf\u03af\u03b7\u03c3\u03b7, \u03c9\u03c2 \u03c3\u03c5\u03bd\u03ac\u03c1\u03c4\u03b7\u03c3\u03b7 \u03c4\u03bf\u03c5 f, \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03bd\u03b1 \u03c0\u03c1\u03b1\u03b3\u03bc\u03b1\u03c4\u03bf\u03c0\u03bf\u03b9\u03b7\u03b8\u03b5\u03af \u03b1\u03bd\u03b1\u03bb\u03c5\u03c4\u03b9\u03ba\u03ac \u03ba\u03b1\u03b9 \u03bd\u03b1 \u03b4\u03ce\u03c3\u03b5\u03b9:<\/p>\n<p><a name=\"id1819142756\"><\/a><\/p>\n<p class=\"ql-center-displayed-equation\" style=\"line-height: 39px;\"><span class=\"ql-right-eqno\"> (16) <\/span><span class=\"ql-left-eqno\"> &nbsp; <\/span><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/viewonphysics.gr\/wp-content\/ql-cache\/quicklatex.com-ea626d6c789e88fec48f7e6a56017b23_l3.png\" height=\"39\" width=\"131\" class=\"ql-img-displayed-equation quicklatex-auto-format\" alt=\"&#92;&#98;&#101;&#103;&#105;&#110;&#123;&#101;&#113;&#117;&#97;&#116;&#105;&#111;&#110;&#42;&#125;&#32;&#32; &#102;&#61;&#92;&#102;&#114;&#97;&#99;&#123;&#92;&#115;&#113;&#114;&#116;&#123;&#49;&#43;&#77;&#125;&#45;&#49;&#125;&#123;&#77;&#125; &#92;&#101;&#110;&#100;&#123;&#101;&#113;&#117;&#97;&#116;&#105;&#111;&#110;&#42;&#125;\" title=\"Rendered by QuickLaTeX.com\"\/><\/p>\n<p>\u0393\u03b9\u03b1 <span style=\"font-size: 12pt;\">M = 20<\/span>, \u03b1\u03c5\u03c4\u03cc \u03b4\u03af\u03bd\u03b5\u03b9 <span style=\"font-size: 12pt;\">f = 0,18<\/span>.<br \/>\n\u039c\u03b5 \u03b1\u03c5\u03c4\u03ac \u03c4\u03b1 \u03b4\u03cd\u03bf \u03ba\u03c1\u03b9\u03c4\u03ae\u03c1\u03b9\u03b1 \u03c0\u03bf\u03c5 \u03ad\u03c7\u03bf\u03c5\u03bd \u03c7\u03b1\u03bc\u03b7\u03bb\u03ae \u03b3\u03c9\u03bd\u03b9\u03b1\u03ba\u03ae \u03c4\u03b1\u03c7\u03cd\u03c4\u03b7\u03c4\u03b1 \u03ba\u03b1\u03b9 \u03c7\u03b1\u03bc\u03b7\u03bb\u03cc \u03ba\u03ad\u03bd\u03c4\u03c1\u03bf \u03bc\u03ac\u03b6\u03b1\u03c2, \u03c4\u03bf \u03b1\u03ba\u03b1\u03c4\u03ad\u03c1\u03b3\u03b1\u03c3\u03c4\u03bf \u03bc\u03bf\u03bd\u03c4\u03ad\u03bb\u03bf \u03bc\u03b1\u03c2 \u03c0\u03b1\u03c1\u03ad\u03c7\u03b5\u03b9 \u03bc\u03b9\u03b1 \u03c0\u03c1\u03cc\u03b2\u03bb\u03b5\u03c8\u03b7 \u03b3\u03b9\u03b1 \u03c4\u03bf \u03b2\u03ad\u03bb\u03c4\u03b9\u03c3\u03c4\u03bf \u03b5\u03cd\u03c1\u03bf\u03c2. \u0391\u03c5\u03c4\u03cc \u03c6\u03b1\u03af\u03bd\u03b5\u03c4\u03b1\u03b9 \u03c9\u03c2 \u03b7 \u03b3\u03ba\u03c1\u03af\u03b6\u03b1 \u03b6\u03ce\u03bd\u03b7 \u03c3\u03c4\u03b7\u03bd <a href=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2018\/10\/Bottle-6.jpg\" target=\"_blank\" rel=\"noopener\">\u0395\u03b9\u03ba. 6<\/a>. \u03a4\u03bf \u03c3\u03c7\u03ae\u03bc\u03b1 \u03b4\u03b5\u03af\u03c7\u03bd\u03b5\u03b9 \u03cc\u03c4\u03b9 \u03c4\u03b1 \u03ba\u03b1\u03bb\u03ac \u03ba\u03bb\u03ac\u03c3\u03bc\u03b1\u03c4\u03b1 \u03c0\u03bb\u03ae\u03c1\u03c9\u03c3\u03b7\u03c2 \u03b2\u03c1\u03af\u03c3\u03ba\u03bf\u03bd\u03c4\u03b1\u03b9 \u03c3\u03c4\u03b7\u03bd \u03c0\u03b5\u03c1\u03b9\u03bf\u03c7\u03ae \u03c0\u03b5\u03c1\u03af\u03c0\u03bf\u03c5 20% -40%. \u0391\u03c5\u03c4\u03cc \u03c3\u03c5\u03bc\u03b2\u03b1\u03b4\u03af\u03b6\u03b5\u03b9 \u03bc\u03b5 \u03c4\u03b9\u03c2 \u03b1\u03bd\u03b1\u03c6\u03bf\u03c1\u03ad\u03c2 \u03c0\u03bf\u03c5 \u03b2\u03c1\u03ad\u03b8\u03b7\u03ba\u03b1\u03bd \u03c3\u03c4\u03bf \u0394\u03b9\u03b1\u03b4\u03af\u03ba\u03c4\u03c5\u03bf, \u03bf\u03b9 \u03bf\u03c0\u03bf\u03af\u03b5\u03c2 \u03c3\u03c5\u03bd\u03ae\u03b8\u03c9\u03c2 \u03b1\u03bd\u03b1\u03c6\u03ad\u03c1\u03bf\u03bd\u03c4\u03b1\u03b9 \u03c3\u03c4\u03bf 1 \/ 4-1 \/ 3.<\/p>\n<h2><span style=\"color: #0000ff;\"><strong>V. \u03a3\u03a5\u0396\u0397\u03a4\u0397\u03a3\u0397<\/strong><\/span><\/h2>\n<p>\u0393\u03b9\u03b1 \u03bd\u03b1 \u03c3\u03c5\u03bd\u03bf\u03c8\u03af\u03c3\u03bf\u03c5\u03bc\u03b5, \u03c0\u03b1\u03c1\u03bf\u03c5\u03c3\u03b9\u03ac\u03c3\u03b1\u03bc\u03b5 \u03c4\u03b7 \u03c6\u03c5\u03c3\u03b9\u03ba\u03ae \u03c4\u03bf\u03c5 \u03c0\u03b5\u03c4\u03ac\u03b3\u03bc\u03b1\u03c4\u03bf\u03c2 \u03c4\u03b7\u03c2 \u03c6\u03b9\u03ac\u03bb\u03b7\u03c2 \u03bd\u03b5\u03c1\u03bf\u03cd \u03c9\u03c2 \u03bc\u03b9\u03b1 \u03c3\u03cd\u03b3\u03c7\u03c1\u03bf\u03bd\u03b7 \u03b1\u03c0\u03b5\u03b9\u03ba\u03cc\u03bd\u03b9\u03c3\u03b7 \u03c4\u03c9\u03bd \u03b1\u03c1\u03c7\u03ce\u03bd \u03c4\u03b7\u03c2 \u03c0\u03b5\u03c1\u03b9\u03c3\u03c4\u03c1\u03bf\u03c6\u03b9\u03ba\u03ae\u03c2 \u03bc\u03b7\u03c7\u03b1\u03bd\u03b9\u03ba\u03ae\u03c2. \u0395\u03c0\u03b9\u03c4\u03c1\u03ad\u03c0\u03b5\u03b9 \u03bc\u03b9\u03b1 \u03c0\u03bf\u03b9\u03ba\u03b9\u03bb\u03af\u03b1 \u03c0\u03b5\u03b9\u03c1\u03b1\u03bc\u03b1\u03c4\u03b9\u03ba\u03ce\u03bd \u03ba\u03b1\u03b9 \u03b8\u03b5\u03c9\u03c1\u03b7\u03c4\u03b9\u03ba\u03ce\u03bd \u03b5\u03be\u03b5\u03c1\u03b5\u03c5\u03bd\u03ae\u03c3\u03b5\u03c9\u03bd \u03c0\u03bf\u03c5 \u03b5\u03af\u03bd\u03b1\u03b9 \u03ba\u03b1\u03c4\u03ac\u03bb\u03bb\u03b7\u03bb\u03b5\u03c2 \u03b3\u03b9\u03b1 \u03c0\u03c1\u03bf\u03c0\u03c4\u03c5\u03c7\u03b9\u03b1\u03ba\u03ac 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\u03bc\u03b1\u03b8\u03b7\u03c4\u03ce\u03bd \u03bd\u03b1 \u03c0\u03b5\u03c4\u03bf\u03cd\u03bd \u03c4\u03b9\u03c2 \u03c0\u03bb\u03b1\u03c3\u03c4\u03b9\u03ba\u03ad\u03c2 \u03c6\u03b9\u03ac\u03bb\u03b5\u03c2 \u03c4\u03bf\u03c5 \u03bd\u03b5\u03c1\u03bf\u03cd \u03bc\u03b5 \u03c3\u03ba\u03bf\u03c0\u03cc \u03b1\u03c5\u03c4\u03ad\u03c2 \u03bd\u03b1 \u03c0\u03c1\u03bf\u03c3\u03b3\u03b5\u03b9\u03c9\u03b8\u03bf\u03cd\u03bd \u03ba\u03ac\u03b8\u03b5\u03c4\u03b1 \u03c3\u03c4\u03b7\u03bd \u03b5\u03c0\u03b9\u03c6\u03ac\u03bd\u03b5\u03b9\u03b1 \u03c4\u03bf\u03c5 \u03b8\u03c1\u03b1\u03bd\u03af\u03bf\u03c5 \u03c4\u03bf\u03c5\u03c2. \u03a4\u03bf \u03c0\u03b1\u03c1\u03b1\u03ba\u03ac\u03c4\u03c9 \u03ac\u03c1\u03b8\u03c1\u03bf \u03b1\u03c0\u03cc \u03c4\u03bf American Journal of Physics \u03c0\u03b1\u03c1\u03bf\u03c5\u03c3\u03b9\u03ac\u03b6\u03b5\u03b9 \u03bc\u03af\u03b1 \u03c0\u03b9\u03bf \u03b5\u03bc\u03c0\u03b5\u03c1\u03b9\u03c3\u03c4\u03b1\u03c4\u03c9\u03bc\u03ad\u03bd\u03b7 \u03ba\u03b1\u03b9 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":6814,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[34],"tags":[],"class_list":["post-6806","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-34"],"jetpack_featured_media_url":"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2018\/09\/Bottle-2.jpg","jetpack_shortlink":"https:\/\/wp.me\/p4sIra-1LM","jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"_links":{"self":[{"href":"https:\/\/viewonphysics.gr\/index.php?rest_route=\/wp\/v2\/posts\/6806","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/viewonphysics.gr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/viewonphysics.gr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/viewonphysics.gr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/viewonphysics.gr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=6806"}],"version-history":[{"count":98,"href":"https:\/\/viewonphysics.gr\/index.php?rest_route=\/wp\/v2\/posts\/6806\/revisions"}],"predecessor-version":[{"id":6954,"href":"https:\/\/viewonphysics.gr\/index.php?rest_route=\/wp\/v2\/posts\/6806\/revisions\/6954"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/viewonphysics.gr\/index.php?rest_route=\/wp\/v2\/media\/6814"}],"wp:attachment":[{"href":"https:\/\/viewonphysics.gr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=6806"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/viewonphysics.gr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6806"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/viewonphysics.gr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6806"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}