{"id":1053,"date":"2011-08-20T09:33:26","date_gmt":"2011-08-20T07:33:26","guid":{"rendered":"http:\/\/www.zsvltava.cz\/fyzika\/?p=1053"},"modified":"2017-08-28T08:58:14","modified_gmt":"2017-08-28T06:58:14","slug":"3-priklady-s-pocitanim-hustoty","status":"publish","type":"post","link":"https:\/\/www.zsvltava.cz\/fyzika\/?p=1053","title":{"rendered":"P\u0159\u00edklad se sirkami"},"content":{"rendered":"<p>Krabi\u010dka od z\u00e1palek m\u00e1 rozm\u011bry 5 cm x 3,5 cm x 1,5 cm. K v\u00fdrob\u011b sirek se nej\u010dast\u011bji pou\u017e\u00edv\u00e1 smrkov\u00e9ho, osikov\u00e9 nebo d\u0159evo z topolu. Hustota smrkov\u00e9ho d\u0159eva je p\u0159ibli\u017en\u011b 0,450 g\/cm<sup>3<\/sup>, hustota osikov\u00e9ho d\u0159eva je  0,420&nbsp;g\/cm<sup>3<\/sup> a hustota d\u0159eva z topolu je 0,470&nbsp;g\/cm<sup>3<\/sup>.<\/p>\n<p><strong>K vy\u0159e\u0161n\u00ed vyu\u017eijeme v\u00fdpo\u010det hmotnosti ze zn\u00e1m\u00e9 hustoty a objemu.<\/strong> <\/p>\n<ol type=\"1\" class=\"ns_priklady\">\n<li>Kter\u00e9 d\u0159evo vybereme, kdy\u017e budeme cht\u00edt, aby byly sirky co nejleh\u010d\u00ed?<\/li>\n<li>Kolik budou v\u00e1\u017eit sirky z topolov\u00e9ho d\u0159eva? <br \/>(Mezery mezi sirkami nebudeme br\u00e1t v \u00favahu.)<\/li>\n<li>Kolikr\u00e1t bude hmotnost krabi\u010dky t\u011b\u017e\u0161\u00ed, pokud bude zcela vypln\u011bna zlatem? <br \/>(Hustota zlata je 19,320 g\/cm<sup>3<\/sup>.)<\/li>\n<\/ol>\n<p><a href=\"http:\/\/www.solosirkarna.cz\/zajimavosti\">Zaj\u00edmavosti o z\u00e1palk\u00e1ch &rarr;<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Krabi\u010dka od z\u00e1palek m\u00e1 rozm\u011bry 5 cm x 3,5 cm x 1,5 cm. K v\u00fdrob\u011b sirek se nej\u010dast\u011bji pou\u017e\u00edv\u00e1 smrkov\u00e9ho, osikov\u00e9 nebo d\u0159evo z topolu. &#8230;. <\/p>\n","protected":false},"author":1,"featured_media":2597,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[57,39],"tags":[32,55],"class_list":["post-1053","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-6-rocnik","category-priklady-pro-6-rocnik","tag-objem-a-hustota","tag-priklad"],"_links":{"self":[{"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=\/wp\/v2\/posts\/1053","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=1053"}],"version-history":[{"count":0,"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=\/wp\/v2\/posts\/1053\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=\/wp\/v2\/media\/2597"}],"wp:attachment":[{"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1053"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1053"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1053"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}