Jawabanmu

2014-05-20T11:53:10+07:00
M1 C Δt = m2 C Δt
150 x 50 = m2 40
m2 = 150 x 50 / 40
= 187,5 gram
2014-05-20T12:23:23+07:00
DIk=
m₁=150 kg
t₁=90°
t₂=0°
ta=40°
dit=m₂
jwb=
Q₁=Q₂
m₁.c.ΔT=m₂.c.ΔT
m₁.ΔT=m₂.ΔT
150.(t₁-ta)=m₂.(ta-t₂)
150(90-40)=m₂(40-0)
150.50=m₂.40
7500=40 m₂
m₂=187,5 kg