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t=1 godzina= 3600s
P=w/t
Pt=W
W=P*t
W=25000* 3600
W= 90000000J
Wyprowadzanie jednostki
W=1W*1s
W=1J
Odp: Praca wynosi 90000000J
P=25kW=25000W W=?
t=1h=3600s
W=P/t
W=25000/3600
W=6i17/18 J/s
t=1 h= 3600s
P=w/t
Pt=W
W=P*t
W=25000* 3600
W= 90000000J
Odp: Praca wynosi 90000000J