1)
P=V^2/R
R=V^2/P
R=240^2/100
R=576 ohms
2)
Energy (kWh)=Power (kW) x time (h)
Energy (kWh)= (100/1000) x (10/60)
Energy (kWh)= 0.1 x (1/6)
Energy (kWh)= 1/60 kWh
Energy (kWh)= 0.017 kWh
3)
Energy (J)=Power (W) x time (s)
Energy (J)= 400 x (5 x 60)
Energy (J)= 400 x 300...