an electric heater is rated 1500w. how much energy does it use in 10 hrs.express your answer kwt and joules. Share with your friends Share 11 Hansraj Rai answered this Energy = (Power)x(Time) = 1500x10 watt-h = 15,000 watt-h = 15 kilo watt-h 14 View Full Answer Jeffrin John answered this Total power of the device=1500wTime=10hTherefore, E=PtE=1500*10=15000whkwh=150001000=15kwh or 15units1 kwh=3.6*10^6joules54*10^6 joules 12
