Предмет: Физика, автор: viktoriiasaiko10

У теплоізольовану посудину, в якій міститься 1,56 кг води за температури 10 °С опускають сталеву кульку об'ємом 100 см³ за температури 99°С. Визначити температуру суміші.
ДАЮ 100 БАЛІВ ЯКЩО РОЗВ'ЯЖЕТЕ ДО РАНКУ

Ответы

Автор ответа: kp481

Ответ:

315К=42°С.

Объяснение:

Для начала вычислим массу стального шарика: 7,8г*100см(3)/см(3)=7800г=7,8кг; далее вычислим энергию тепла воды: 4180Дж*1,56кг*283К/кг*К=1 845 386Дж и энергию тепла шарика: 460Дж*7,8кг*372К/кг*К=1 334 736Дж, общая энергия системы равна: 1 845 386Дж+1 334 736Дж=3 180 122Дж; вычислим получившуюся температуру: 3 180 122Дж/(4180Дж*1,56кг/кг*К)+(460Дж*7,8кг/кг*К)=315К=42°С.

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