Respostas

2013-03-24T18:09:23-03:00

facinho :

 

Q = m.c.(tf - ti )

5000 = 1000. 0,02 . ( t -10)

5000 = 20 .(t - 10)

5000 \ 20 = t - 10

250 = t - 10

t = 250 + 10

t  = 260 C

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