Odpowiedzi

2009-05-21T20:50:47+02:00
M₁ × c₁ × (tk - t₁) = m₂ × c₂ × (t₂ - tk)
60 × 4200 × 20 = 30 × 4200 × t₂ - 40
15120000 = 126000t₂ / :126000
t₂ = 120[⁰C]