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Q = kalor = 644 Joule
c = kalor jenis = 920 J/kg°C
Δt = selisih suhu = t2 - t1 = 110 - 40 = 70°C
Dit :
m = massa
m = (Q /c.Δt)
m = 644 / 920 x 70
m = 0,01 kg
Jadi M atau massanya adalah 0,01 Kg