Jawabanmu

2014-08-08T16:16:36+07:00
Q = m x c x ΔT
    =4kg x 460 J/kg x 80celcius-30celcius
    = 4 x 460 x 50 = 9200 J
1 3 1
2014-08-08T16:50:38+07:00
4 kg . 460 j/kg . 50 derajat celcius = 9200 J