Предмет: Физика, автор: sverchenina

Если камень массой 50 кг, остывая на 0,2 К отдает окружающей среде количество теплоты равное 4200 Дж, то удельная теплоемкость камня равна
A) 500 Дж/кг К
B) 420 Дж/кг К
C) 420 кДж/кг К
D) 9,8 Дж/кг - К
E) 0,5 кДж/кг-К
F) 840 Дж/кг
G) 0,42 кДж/кг К
H) 0,84 кДж/кг-К

Ответы

Автор ответа: jamesvoskr
1
Б) 420 Дж/кг К
.........

sverchenina: Спасибо ))))
Автор ответа: o2784913
4

Дано:

Q=4 200 Дж

m=50 кг

T=0,2 К

c-?

Решение:

Q=cmT

c=Q/mT

c=4 200/50*0,2=420 (дж/кг*К)

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