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crav4ukvowa
@crav4ukvowa
July 2022
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Свинцовый шар падает с высоты 80 м на твердую поверхность. При этом кинетическая энергия переходит в теплоту, 80% которой им усваивается. Теплоемкость свинца кДж/(кг·К)=0,1256. На сколько градусов нагревается при падении шар?
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sokolovvovikn
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По закону сохранения энергии 0,8*m*g*h=c*m*dt
dt=0,8*g*h/c=0,8*10*80/125,6=5 градусов.
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По закону сохранения энергии 0,8*m*g*h=c*m*dtdt=0,8*g*h/c=0,8*10*80/125,6=5 градусов.