{"id":1972,"date":"2024-12-27T10:36:46","date_gmt":"2024-12-27T09:36:46","guid":{"rendered":"http:\/\/www.zsvltava.cz\/fyzika\/?p=1972"},"modified":"2026-02-03T07:45:19","modified_gmt":"2026-02-03T06:45:19","slug":"o-zvuku","status":"publish","type":"post","link":"https:\/\/www.zsvltava.cz\/fyzika\/?p=1972","title":{"rendered":"P\u016fvod zvuku"},"content":{"rendered":"<p>V\u0161echno ve vesm\u00edru je v neust\u00e1l\u00e9m pohybu. Kdy\u017e sledujme nap\u0159\u00edklad hrne\u010dek na stole &#8211; jev\u00ed se n\u00e1m stabiln\u00ed a nehybn\u00fd. <\/p>\n<p><iframe loading=\"lazy\" src=\"https:\/\/www.flickr.com\/photos\/30403793@N03\/9065506985\/player\/c300e77bed\" height=\"367\" width=\"500\"  frameborder=\"0\" allowfullscreen webkitallowfullscreen mozallowfullscreen oallowfullscreen msallowfullscreen><\/iframe><\/p>\n<p>\u010caj v hrne\u010dku m\u00e1 ur\u010ditou teplotu. <a href=\"http:\/\/www.zsvltava.cz\/fyzika\/?s=teplota\">Teplota<\/a> t\u011blesa je d\u00e1na pohybem \u010d\u00e1stic, kter\u00e9 ji tvo\u0159\u00ed. M\u00e1-li t\u011bleso n\u011bjakou teplotu v\u011bt\u0161\u00ed ne\u017e <a href=\"http:\/\/cs.wikipedia.org\/wiki\/Absolutn%C3%AD_nula\">absolutn\u00ed nula<\/a> (-273,15 \u00b0C !!) znamen\u00e1 to, \u017ee je v pohybu. <\/p>\n<p>Tento pohyb nen\u00ed lidsk\u00fdm okem zaznamenateln\u00fd. V\u00fdchylky jsou p\u0159\u00edli\u0161 mal\u00e9. Ale jist\u011b nen\u00ed probl\u00e9m se v okol\u00ed hrne\u010dku rukou p\u0159esv\u011bd\u010dit, \u017ee k pohybu doch\u00e1z\u00ed. K\u016f\u017ee na ruce toti\u017e tak\u00e9 reaguje na teplotu &#8211; pohyb. V okol\u00ed chladn\u00e9ho nebo hork\u00e9ho t\u011blesa snadno zm\u011bnu zaznamen\u00e1me. <\/p>\n<p>Pohybuj\u00edc\u00ed \u010d\u00e1stice nar\u00e1\u017e\u00ed do okol\u00ed &#8211; vzduchu a ten pak p\u0159en\u00e1\u0161\u00ed energii d\u00e1le. Pokud je energie dostate\u010dn\u00e1, doraz\u00ed a\u017e k na\u0161emu uchu kde nar\u00e1\u017eej\u00ed do u\u0161n\u00edho bub\u00ednku. Ten se rozvibruje stejn\u011b jako zdroj tohoto pohybu.<\/p>\n<p><a href=\"http:\/\/www.zsvltava.cz\/fyzika\/wp-content\/uploads\/2013\/02\/ucho.png\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.zsvltava.cz\/fyzika\/wp-content\/uploads\/2013\/02\/ucho-645x564.png\" alt=\"\" title=\"ucho\" width=\"645\" height=\"564\" class=\"size-medium wp-image-1659\" srcset=\"https:\/\/www.zsvltava.cz\/fyzika\/wp-content\/uploads\/2013\/02\/ucho-645x564.png 645w, https:\/\/www.zsvltava.cz\/fyzika\/wp-content\/uploads\/2013\/02\/ucho-150x131.png 150w, https:\/\/www.zsvltava.cz\/fyzika\/wp-content\/uploads\/2013\/02\/ucho.png 701w\" sizes=\"auto, (max-width: 645px) 100vw, 645px\" \/><\/a><\/p>\n<p>Z tohoto pov\u00edd\u00e1n\u00ed vypl\u00fdv\u00e1, \u017ee v\u0161echno vyd\u00e1v\u00e1 zvuk?!<\/p>\n<p><iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/Q3oItpVa9fs?si=5_DTS0H0m2yOr2de\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<h2>Jak funguj\u00ed sluch\u00e1tka?<\/h2>\n<p><iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/_ZKNOKHpqE4?si=ZpdZdVgvC1FJi93n\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n","protected":false},"excerpt":{"rendered":"<p>V\u0161echno ve vesm\u00edru je v neust\u00e1l\u00e9m pohybu. Kdy\u017e sledujme nap\u0159\u00edklad hrne\u010dek na stole &#8211; jev\u00ed se n\u00e1m stabiln\u00ed a nehybn\u00fd. \u010caj v hrne\u010dku m\u00e1 ur\u010ditou &#8230;. <\/p>\n","protected":false},"author":1,"featured_media":5181,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[61],"tags":[],"class_list":["post-1972","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-zvuk"],"_links":{"self":[{"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=\/wp\/v2\/posts\/1972","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1972"}],"version-history":[{"count":2,"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=\/wp\/v2\/posts\/1972\/revisions"}],"predecessor-version":[{"id":6486,"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=\/wp\/v2\/posts\/1972\/revisions\/6486"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=\/wp\/v2\/media\/5181"}],"wp:attachment":[{"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1972"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1972"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1972"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}