Odpowiedzi

2013-07-01T19:17:50+02:00

 

Q =420 kJ = 420 000J

c = 4200J/kg°C

ΔT = 2°C

 

Q = cmΔT => m = Q/cΔT

 

m = 420 000J/4200J/kg°C x 2°C = 50kg

 

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