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P- (moc)= 25kW= 25 000 W
t- (czas)= 1h= 3600s
Szukane:
W- praca= ?
Wzór:
P= W:t
W= P *t
Obliczanie:
W= 25 000W * 3600s= 90000000J= 90 MJ
Odp:
Praca ta wynosi 90 MJ.