Nomor 11 Yang Di Lingkari

KALOR

m₁ = 200 gr. t₁ = 20 °C
m₂ = 500 gr. t₂ = 80 °C
t = __?

suhu campuran
t = (m₁ t₁ + m₂ t₂) / (m₁ + m₂)
t = (200 • 20° + 500 • 80°) / (200 + 500)
t ≈ 63 °C ✔️