Wyjaśnienie:
P = 400W
t=30s
P = W/t
W = P × t
W = 400W × 30s = 12 000J = 12 kJ
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Wyjaśnienie:
P = 400W
t=30s
P = W/t
W = P × t
W = 400W × 30s = 12 000J = 12 kJ