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m₁= 200 gram = 0,2 kg
t₁= 80°C
m₂= 300 gram = 0,3 kg
t₂= 20°C
Dit = ta
Jwb=
Q₁=Q₂
m₁.c.Δt=m₂.c.Δt
m₁.(t₁-ta)=m₂.(ta-t₂)
0,2.(80-ta)=0,3.(ta-20)
16-0,2 ta=0,3 ta- 6
0,5 ta= 22
ta= 44°C