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= 4 x 460 x (70-20)
= 4 x 460 x 50
= 92.000 J
Q = Kalor, satuan Joule
m = massa. satuan Kg = 4 kg
c = kalor jenis, satuan J/Kg°C = 460 J/Kg°C
Δt = selisih suhu, satuan °C = 70 - 20 = 50°C
Q = 4 x 460 x 50 = 92.000 Joule
Jawaban : C