Respostas

2014-05-25T19:38:49-03:00
Q1 + Q2 = 0

m1*c*/\t + m2*c*/\t = 0

1000*1*(tf-20) + 2000*1*(tf-50) = 0

1000tf - 20.000 + 2000tf - 100.000 = 0

3000tf - 120.000 = 0

3tf =120

tf = 120/3

tf = 40°C
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