Respostas

2013-08-15T15:44:24-03:00
Temos que:

15 minutos * 15 calorias = Q

Q = 225 calorias

Q = m*c*/\T
225 = 50 * c * (50 - 20)

225/50 = 30c

4,5 / 30 = c

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c = 0,15 cal/g*°C
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