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t₁ = 60 C
m₂ = 1 kg
t₂ = 10 C
t = ?
Q₁ = Q₂
m₁ * cw *(t₁ - t ) = m₂*cw * (t - t₂) /:cw
m₁t₁ - m₁t = m₂t - m₂t₂
m₁t₁ + m₂t₂ = m₂t -+m₁t
m₁t₁ + m₂t₂ = t *( m₂+m₁)
t = m₁t₁ + m₂t₂ / m₂+m₁
t = 2 kg *60 C + 1kg * 10 C / 3 kg
t ≈ 43,3 C