Jawabanmu

2014-06-10T15:45:40+07:00
Qab = m.c.ΔT
 0,5 x 2100 x 10
Qab = 10500

Qbc = m.L
0,5 x 33600
Qbc = 16800

Qcd = m.c.ΔT
0,5 x 4200 x 60
Qcd = 126000

Qad = Qab + Qbc + Qcd
10500 + 16800 + 126000

Qad = 153300 Joule

2014-06-10T15:54:12+07:00
Q=Qab+Qbc+Qcd
=mxcxdeltaT+mxL+mxcxdeltaT
=0,5x2.100x10+0,5x336.000+0,5x4.200x60
=10.500+168.000+126.000
=304.500J
thanks tpi aku bingung jawaban yg benar mna??