Odpowiedzi

2010-01-14T15:18:58+01:00
M= 5 kg
cw = 4200 J/kg*C
delta T = 20 C
E=Q= ?
Q = m*cw *delta T
Q = 5 kg*4200 J/kg*C* 20 C
Q = 420000 J = 420 kJ
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