Odpowiedzi

2010-03-13T23:38:51+01:00
Dane:
m2=150g=0,15kg
t2=20st
t1=200st
t=62st
cw2=4200J/kg*st
cw1=400J/kg *st
m1 *cw1 *(t1-t)=m2 *cw2 *(t-t2) /:cw1 *(t1-t)
m1=0,15 *4200*42 /400 *138
m1=0,48kg
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