Odpowiedzi

2010-03-29T17:30:55+02:00
W= x
P= 25 kW= 25000 W
t= 2h= 7200 s

W= P*t
W= 180000000 J

1 J = 1/3600000 kWh
180000000 J = x

x= 180000000/3600000
x= 50
180000000 J = 50 kWh