Предмет: Физика, автор: Аноним

ФИЗИКА 8 КЛАСС ПОМОГИТЕ!!! ДАЮ 75 БАЛЛОВ

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Автор ответа: kxvincent2000

Ответ:

4) Q =cm дельта T.

m1 = 500 гр. = 0,5 кг.

m2 = 200 гр. = 0,2 кг.

T1 = 127°С.

T2=17°C.

c(стали) = 500 Дж/кг°С.

с(свинца) = 140 Дж/кг°С.

Q1 = 500Дж/кг°С * 0,5 кг * (127°С - 17°С) = 27 500 Дж.

Q2= 140Дж/кг°С * 0,2 кг * (127°С - 17°С) = 3 080 Дж.

Q = Q1+Q2 = 27 500 Дж + 3 080 Дж = 30 580 Дж.

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