Respostas

2013-09-03T02:40:32-03:00
Calorias = 1000 cal/min * 20 min = 20.000 calorias

Q = m*c*/\t

20.000 = 2.000 * c * (70-20)

20.000 = 2000 * 50 * c

20.000 = 100.000 c

20.000/100.000 = c

20/100 = c

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c = 0,2 cal/g*°C
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