Odpowiedzi

2010-03-22T20:21:52+01:00
P=2,1kW=2100W
t=12min=12*60s=720s
W=?
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W=P*t=2100W*720s=1512000Ws=1512000J=1,512MJ megadżula
2010-03-22T20:38:55+01:00
P=2,1kW=2100W
t=12min
P=W : t
W=P*t
W=2100*12/60=10500