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<\/figure>\n\n\n\nEnergia este o m\u0103rime fizic\u0103 fundamental\u0103 care exprim\u0103 capacitatea unui corp sau a unui sistem de a efectua lucru mecanic, de a produce mi\u0219care, c\u0103ldur\u0103 sau alte fenomene. \u00cen natur\u0103 exist\u0103 mai multe forme de energie: energie mecanic\u0103, termic\u0103, electric\u0103, chimic\u0103, nuclear\u0103, radiant\u0103 (lumin\u0103)<\/strong> etc.<\/p>\n\n\n\n Legea conserv\u0103rii \u0219i transform\u0103rii energiei<\/strong> afirm\u0103 c\u0103:<\/p>\n\n\n\n \u27a1 Energia nu poate fi creat\u0103 sau distrus\u0103, ea se transform\u0103 doar dintr-o form\u0103 \u00een alta, dar suma total\u0103 a energiei \u00eentr-un sistem \u00eenchis r\u0103m\u00e2ne constant\u0103.<\/em><\/p>\n\n\n\n Aceast\u0103 lege este una dintre cele mai importante legi ale naturii \u0219i se aplic\u0103 \u00een toate domeniile fizicii.<\/p>\n\n\n\n Dac\u0103 ridic\u0103m o minge \u0219i apoi o l\u0103s\u0103m s\u0103 cad\u0103, putem observa cum energia poten\u021bial\u0103 gravita\u021bional\u0103 a mingii se transform\u0103 \u00een energie cinetic\u0103. La contactul cu solul, o parte din energia cinetic\u0103 se transform\u0103 \u00een sunet \u0219i c\u0103ldur\u0103, dar energia total\u0103 r\u0103m\u00e2ne aceea\u0219i<\/strong>.<\/p>\n\n\n\n Legea conserv\u0103rii \u0219i transform\u0103rii energiei ne arat\u0103 c\u0103 nimic nu se pierde, nimic nu se creeaz\u0103, totul se transform\u0103<\/strong>. Aceasta st\u0103 la baza \u00een\u021belegerii fenomenelor naturale \u0219i a progresului tehnologic.<\/p>\n\n\n\n <\/p>\n\n\n\n <\/p>\n\n\n\n <\/p>\n\n\n\n <\/p>\n\n\n\n Tema:<\/strong> Legea conserv\u0103rii \u0219i transform\u0103rii energiei<\/p>\n\n\n\n Bifeaz\u0103 varianta corect\u0103:<\/p>\n\n\n\n Completeaz\u0103 spa\u021biile libere:<\/p>\n\n\n\n O minge de mas\u0103 0,5 kg<\/strong> este ridicat\u0103 la o \u00een\u0103l\u021bime de 4 m<\/strong>.<\/p>\n\n\n\n Scrie un exemplu din via\u021ba ta de zi cu zi \u00een care observi transformarea energiei. Precizeaz\u0103:<\/p>\n\n\n\n R\u0103spunde pe scurt:<\/p>\n\n\n\n Energia este o m\u0103rime fizic\u0103 fundamental\u0103 care exprim\u0103 capacitatea unui corp sau a unui sistem de a efectua lucru mecanic, de a produce mi\u0219care, c\u0103ldur\u0103 sau alte fenomene. \u00cen natur\u0103 […]<\/p>\n","protected":false},"author":1,"featured_media":2306,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18,10],"tags":[],"_links":{"self":[{"href":"https:\/\/cedra.academy\/index.php?rest_route=\/wp\/v2\/posts\/2299"}],"collection":[{"href":"https:\/\/cedra.academy\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cedra.academy\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cedra.academy\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cedra.academy\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2299"}],"version-history":[{"count":1,"href":"https:\/\/cedra.academy\/index.php?rest_route=\/wp\/v2\/posts\/2299\/revisions"}],"predecessor-version":[{"id":2305,"href":"https:\/\/cedra.academy\/index.php?rest_route=\/wp\/v2\/posts\/2299\/revisions\/2305"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cedra.academy\/index.php?rest_route=\/wp\/v2\/media\/2306"}],"wp:attachment":[{"href":"https:\/\/cedra.academy\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2299"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cedra.academy\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2299"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cedra.academy\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2299"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}Exemple de transform\u0103ri ale energiei<\/h3>\n\n\n\n
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Experiment simplu (observa\u021bional):<\/h3>\n\n\n\n
Concluzie:<\/h3>\n\n\n\n
Fi\u0219\u0103 de lucru \u2013 Fizic\u0103, Clasa a VIII-a<\/h2>\n\n\n\n
Exerci\u021biul 1. Alegerea r\u0103spunsului corect<\/h3>\n\n\n\n
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a) creat\u0103
b) distrus\u0103
c) transformat\u0103
d) transformat\u0103 dintr-o form\u0103 \u00een alta<\/li>\n\n\n\n
a) energie termic\u0103
b) energie electric\u0103
c) energie chimic\u0103
d) energie nuclear\u0103<\/li>\n<\/ol>\n\n\n\n
\n\n\n\nExerci\u021biul 2. Completare<\/h3>\n\n\n\n
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\n\n\n\nExerci\u021biul 3. Problem\u0103 aplicativ\u0103<\/h3>\n\n\n\n
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\n\n\n\nExerci\u021biul 4. Situa\u021bii din via\u021ba de zi cu zi<\/h3>\n\n\n\n
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\n\n\n\nExerci\u021biul 5. Discu\u021bie \u0219i reflec\u021bie<\/h3>\n\n\n\n
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