Jawabanmu

2014-04-23T18:36:41+07:00
Q lepas = q serap
m1 . C1 . Delta T1 = m2 . C2 . Delta T2
1kg . 4184 J/kg (kalor jenis air) . (90-tc) = 2kg . 4184 . (Tc-60)
90 . 1tc = 120 . 2tc
2tc + 1tc = 120 + 90
3tc = 210
tc = 70