do 1 kg wody dostarczono 84.000J (dżuli) ciepła. oblicz przyrost temperatury tej wody wzór: Q / delta T czyli 4200 = 84.000 / 1 delta T i co dalej...
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Q = 84000J
Cw = 4200J/kg·C
m = 1kg
Q = Cw·m·ΔT
ΔT = Q/Cw·m = 84000J/4200J/kg·C·1kg = 20°C