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Ew=m*T*C
Ew=4*60*4200[kg*C*j/kg*C=J]
Ew=1008000 J
2.
2metry+(2*3,2mm)=długość całkowita
2m i 6,4mm
200,64 cm
Dane:
m=4kg
(delta)T=100-40=60 stopni Celsjusza
c=4200j/kg*stopień
(delta)E=c*m*(delta)T
(delta)E=4200*4*60=1008000J=1008kJ