Jawabanmu

2014-05-17T13:04:38+07:00
Q = 2 x 4200 x 50 = 420.000 jouIe = 420 kj
2014-05-17T13:13:55+07:00
Rumusnya = m x c x ΔT
2 x 4200 x 50 = 420 000J