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1kWh kosztuje 40 gr
a
12kW*3,5h=42 KWh
42*0,4=16,80 zł
b
10*100W=1000W=1kW
7*3h=21h
1kW*21h=21kWh
c
4 doby=4*24h=96h
259,2kWh:96h=2,7kW=2700W
2700:60=45 żarówek
3
E=P*t
E[Wh]
czas [h]
w 1h pobiera E=100Wh
więc moc P=100/1=100W
1h pobiera 40Wh energii
więc P=40/1=40 W