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P1 - 50 kW
P2 - 40 kW
P3 - 30 kW
P4 - 20 kW
t = 30s
Szukane: W = ?
W = P*t
Rozwiązanie:
W1 = 50 000*30
W1 = 1 500 000 J
W2 = 40 000*30
W2 = 1 200 000 J
W3 = 30 000*30
W3 = 900 000 J
W4 = 20 000*30
W4 = 600 000 J