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n = W/Q₁ * 100%
Q₁ = W + Q₂
W - praca
Q₂ - ciepło oddane do chłodnicy
u Ciebie:
25% = 600[kJ] / 600[kJ]+Q₂
0,25 = 600[kJ] / 600[kJ]+Q₂
0,25*600[kJ] + 0,25*Q₂ = 600[kJ] /*4
600[kJ] + Q₂ = 2400[kJ]
Q₂ = 2400[kJ] - 600[kJ] = 1800[kJ]
ODP: Oddał 1800[kJ]