Jawabanmu

2014-04-19T21:45:55+07:00
Qlepas = Qterima
m.c.ΔT = m.c.ΔT
karena sama2 air jadi c bisa di coret
m(t1-ta) = m(ta-t2)
m(100-40) = 300(40-10)
60m = 9000
m = 9000/60
m = 150 g atau 0,15 kg

maaf kalau salah ya..
2014-04-19T22:07:18+07:00
Q lepas = Q terima
m1.c.Δt  = m2.c.Δt
300.1.(100-40) = m2.1.(40-0)
300.60 = m2.40
18000 = 40m2
m2     = 450