Предмет: Физика, автор: samiraandr

Помогите!!!35 баллов​

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Ответы

Автор ответа: AlenaLisa74
1

1. Q=cm(tк-tн)

c спирта = 2500 дж/кг* °C

m=2кг

tн=20

tк=40

Q=2500*2*(40-20)=100000Дж=/1000=100Кдж

2. Q=cm(tк-tн)

c воды = 4200 дж/кг* °C

m=10кг

tн=0

tк=50

Q=4200*10*50=2100000Дж=2,1МДж

3. Q=cm(tк-tн)

c алюминия = 920 дж/кг* °C

m=50г=0.05кг

tн=20

tк=80

Q=920*0,05*(80-20)=2760Дж

Если я вам помогла, то отметьте ответ как лучший. Удачи :)


AlenaLisa74: надеюсь на лучший ответ))
samiraandr: отметила))
AlenaLisa74: спасибо)
samiraandr: и вам)
AlenaLisa74: :)
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Great Britain is often called an industrial country. Britain was able to create a powerful heavy industry earlier any other country. For a long time Britain remained the first industrial country in the world.
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Britain’s new branches developed in the 20th century, especially after World War I.
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The branches that arose later, such as the electrical, chemical, artificial silk, motor-car and aircraft industries, machine building, and engineering are the main branches of Great Britain’s industry today. The technical level of these branches is high.
Some time ago the new branches of industry worked mainly for the home market, but today some of them, especially the electrical and chemical industries, occupy an important place in British export.
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