Стальная деталь массой 20 кг при обработке на токарном станке нагрелась на 80 градусов. на сколько дж увеличилась внутренняя энергия детали?

sem212 sem212    1   28.03.2019 23:20    2

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Kira25112016 Kira25112016  27.05.2020 07:15

Дано:

m=20 кг

Δt=80°С

с=460 Дж/К*кг

Найти: Q

Q=cmΔt=20*80*460=736000 Дж=736 кДж.

ответ: Q=736 кДж.

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akakk akakk  27.05.2020 07:15

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          Q=c*m*t=500*20*80=800кДж        

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