1,5кДж = 1500 Дж
Q = Cm(t2-t1)
Q = Cm(Δt)
1500 = 500 * m * 20
m = Q / C(Δt) = 1500 / 500 * 20 = 0'15кг
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1,5кДж = 1500 Дж
Q = Cm(t2-t1)
Q = Cm(Δt)
1500 = 500 * m * 20
m = Q / C(Δt) = 1500 / 500 * 20 = 0'15кг