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t= 1,5min=90s
W= 600W*90s = 54000J= 54kJ
P = 600 W
t = 1.5 min = 90 sekund
Szukane :
W= ?
W= Prazy t
W= 600 razy 90 = 54000 J
w=p*t
w=600W* 150sekund=4J