Odpowiedź :
[tex]P=\frac{W \ [J]}{t \ [s]}\\\\P=160 \ W\\\\t=3 \ min=3\cdot60 \ s=180 \ s\\\\\frac{W}{180 \ s}=160 \ W \ \ |\cdot180 \ s\\\\W=28 \ 800 \ J=\boxed{28,8 \ kJ}[/tex]
Dane:
P = 160 W
t = 3min = 3*60 = 180s
W = ?
P = W/t
W = P*t
W=160*180
W=28800J=28,8kJ