Odpowiedzi

2010-03-22T20:32:04+01:00
P= \frac{W}{t}
P=U*I
I= \frac{P}{U}
I= \frac{W}{t*U}

i: <Be rational>
\pi: <Get real>
3 1 3
2010-03-22T20:33:19+01:00
Dane:
Q = 86,4 MJ = 86400000 J
t = 24 h = 86400 s
U = 220V
Rozw:
P = W/t
W = Q
P = Q/t =86400000 J /86400 s = 1000 W
P = U × I
I = P/U = 1000 W/220V = 4,54 A
4 4 4
2010-03-22T20:33:46+01:00
P=W\t
P=U\P*I
I=P\U
I=W\T*U
I=220V\86,4MJ
I=2,54
1 3 1