{"id":20040,"date":"2011-03-29T06:44:00","date_gmt":"2011-03-29T06:44:00","guid":{"rendered":"http:\/\/trainingsnews.com\/privire-de-ansamblu-asupra-legii-doua-2"},"modified":"2011-03-29T06:44:00","modified_gmt":"2011-03-29T06:44:00","slug":"privire-de-ansamblu-asupra-legii-doua-2","status":"publish","type":"post","link":"https:\/\/cvnextjob.com\/index.php\/2011\/03\/29\/privire-de-ansamblu-asupra-legii-doua-2\/","title":{"rendered":"Privire de ansamblu asupra legii a doua din punct de vedere fizic"},"content":{"rendered":"<div style=\"margin-top: 0px; margin-bottom: 0px;\" class=\"sharethis-inline-share-buttons\" ><\/div><div style=\"text-align: justify;\"><\/div>\n<div><\/div>\n<div class=\"MsoBodyTextIndent\" style=\"text-align: justify; text-indent: 0in;\"><span lang=\"RO\" style=\"font-size: 14pt;\">1. Legea a doua \u015fi entropia. <\/span><span lang=\"RO\">Dup\u0103 cum am v\u0103zut \u00een introducere, legea a doua spune c\u0103 \u201ctrecerea c\u0103ldurii de la un corp cu o temperatur\u0103 dat\u0103 la un corp cu o temperatur\u0103 mai mic\u0103 este un proces ireversibil\u201d.<\/span><span class=\"MsoFootnoteReference\"><span lang=\"RO\" style=\"font-family: Symbol;\"><\/span><\/span><span lang=\"RO\"> <span style=\"color: black;\">\u00cen majoritatea formul\u0103rilor legii a doua se specific\u0103 faptul c\u0103 \u00een cadrul acestui fenomen de transfer de energie entropia totdeauna cre\u015fte. Entropia este o m\u0103rime fizic\u0103 ce caracterizeaz\u0103 gradul de dezordine al mi\u015fc\u0103rii moleculelor. Problema ireversibilit\u0103\u0163ii proceselor naturale \u015fi a cre\u015fterii entropiei o vom dezbate mai pe larg \u00een capitolele urm\u0103toare.<\/span><\/span><span lang=\"RO\" style=\"color: black; font-size: 14pt;\">2.Perpetuum mobile<\/span><span lang=\"RO\" style=\"color: black;\"> .O consecin\u0163\u0103 a legii a doua o constituie imposibilitatea de a construi un <i>perpetuum mobile<\/i> (mecanism care func\u0163ioneaz\u0103 singur pe baza transferului de c\u0103ldur\u0103, f\u0103r\u0103 ajutorul unor for\u0163e exterioare), unul din motive fiind frecarea cu aerul. Ideea construirii unui perpetuunm mobile i-a fascinat pe foarte mul\u0163i oameni. Au fost sute \u015fi sute de \u00eencerc\u0103ri de a construi asemenea mecanisme.Dar toate au fost f\u0103cute \u00een zadar pentru c\u0103 \u00een cele din urm\u0103 s-a constatat, conform legii a doua, c\u0103 este imposibil de a construi un perpetuum mobile. \u00cen ciuda acestui fapt s-au ridicat mul\u0163i escroci care au \u00eencercat s\u0103 duc\u0103 lumea \u00een eroare \u015fi \u00een dreptul multora mai creduli au reu\u015fit. Chiar Newton, marele fizician, a fost pe punctul de a crede posibil\u0103 aceast\u0103 inven\u0163ie, pe atunci necunosc\u00e2ndu-se imposibilitatea construirii ei.<\/span><\/div>\n<div style=\"text-align: justify;\"><\/div>\n<div class=\"MsoBodyTextIndent\" style=\"text-align: justify; text-indent: 0in;\"><span lang=\"RO\" style=\"color: black;\">Vom constata mai departe c\u0103 aceast\u0103 imposibilitate a construirii unui perpetuum mobile se generalizeaz\u0103 \u015fi la procesul men\u0163inerii vie\u0163ii f\u0103r\u0103 ajutorul unor factori exteriori. <\/span><\/div>\n<div style=\"text-align: justify;\"><\/div>\n","protected":false},"excerpt":{"rendered":"<p>1. Legea a doua \u015fi entropia. Dup\u0103 cum am v\u0103zut \u00een introducere, legea a doua spune c\u0103 \u201ctrecerea c\u0103ldurii de la un corp cu o temperatur\u0103 dat\u0103 la un corp cu o temperatur\u0103 mai mic\u0103 este un proces ireversibil\u201d. \u00cen majoritatea formul\u0103rilor legii a doua se specific\u0103 faptul c\u0103 \u00een cadrul acestui fenomen de transfer [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[11],"tags":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/cvnextjob.com\/index.php\/wp-json\/wp\/v2\/posts\/20040"}],"collection":[{"href":"https:\/\/cvnextjob.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cvnextjob.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cvnextjob.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cvnextjob.com\/index.php\/wp-json\/wp\/v2\/comments?post=20040"}],"version-history":[{"count":0,"href":"https:\/\/cvnextjob.com\/index.php\/wp-json\/wp\/v2\/posts\/20040\/revisions"}],"wp:attachment":[{"href":"https:\/\/cvnextjob.com\/index.php\/wp-json\/wp\/v2\/media?parent=20040"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cvnextjob.com\/index.php\/wp-json\/wp\/v2\/categories?post=20040"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cvnextjob.com\/index.php\/wp-json\/wp\/v2\/tags?post=20040"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}