Respostas

2014-07-24T12:07:05-03:00
Q=M.C./\T
2000=250.C.60-20
2000=250.C.40
2000=10000.C
C=2000÷10000= 0,2

0,2 cal/gC
2014-07-24T12:09:54-03:00
C=Q/40°C    c=2000/40   c=50 cal/°C

c=C/m  c=50/250g         c=0,2 cal/g °C

acredito que seja assim: