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P= 400W
t= 5min= 300s
Szukane:
W=?
P=W:t
W=P*t
W=300*400
W=120000J=120kJ
t = 5min= 300s
W = ?
P = W : t (przekształcamy wzór, bo szukamy W)
W = P * t
W = 300 * 400
W = 120000J = 120kJ