Предмет: Физика, автор: osic

1.
Двум телам одинаковой удельной теплоемкости 
с массами
m и 3m сообщили одинаковое количество теплоты.
Какое из тел  нагреется до более высокой
температуры?


    А. Первое.

    Б. Второе.

    В. Температуры обоих тел будут одинаковы.
2.
Какое
количество теплоты необходимо для нагревания чугуна массой 2 кг от 10°С до 110°С?
Удельная теплоемкость чугуна 540 Дж/(кг*°С).

    А. 303кДж.

    Б. 15кДж.

    В. 108кДж.
3.
.
Два тела массой m1 = 1 кг и m2 = 2 кг, состоящие из разных
веществ (с
1=230Дж/(кг*°С), с2=460
Дж/(кг*°С)), нагрели на одинаковое число градусов. Сравните количества теплоты Q1и Q2, сообщенные телам.

    А. 2*Q1= Q2.

    Б. 4*Q1= Q2.

    В. Q1=Q2.
4.
Удельная
теплоемкость свинца равна 140 Дж/(кг*°С). Как изменится внутренняя энергия 1кг
свинца при нагревании его на 1°С?

    А. Увеличится на 140 Дж.

    Б. Уменьшится на 140 Дж.

    В . Увеличится на 280 Дж.
ХОТЯБЫ  1 безразницы какое. Спасибо за ранее

Ответы

Автор ответа: ruslana7
0
1а перше

2в 108
3б 
4а увеличится на 104


Автор ответа: osic
0
на 140 ты имеешь ввиду?
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