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Physics, 21.02.2021 14:10 carterh166
8. Este mult mai usor sa distingem prin pipait o carpa umezita cu apa de una manjita cu ulei. De ce?
9. Aveti pe aragaz o oala cu apa pusa la incalzit. In interiorul ei, pe un suport de metal, introduceti o oala mai mica in care turnati apa. Apa din oala cea mare se ridica pana la un anumit nivel dar nu patrunde in oala cea mica. Incalziti pana ce apa din oala cea mare incepe sa fiarba si continuatiincalzirea. Va fiebe la un moment dat si apa din oala cea mica?
10. Intr-un vas puneti apa care a fost in prealabil fiarta. In acest vas pluteste un al doilea vas, mai mic, care contine apa nefiarta. Incalziti pe aragaz si observati ca apa din vasul mic fierbe mai devreme decat apa din vasul mare. De ce? Daca aruncam in apa din vasul mare cateva frunze de ceai, vom observa ca apa din vasul mic nu mai fierbe. De ce?
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8. Este mult mai usor sa distingem prin pipait o carpa umezita cu apa de una manjita cu ulei. De ce?...
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