A kilowatt hour is the unit of power that an electric current company charges for electrcity. One kilowatt-hour is equal to how many joules?
~Please help!!
2007-04-29 19:03:12 · 5 answers · asked by Cheyenne 2 in Science & Mathematics ➔ Physics
1 kW=1000W
1hour=3600sec
1W=1J/sec
Therefore, 1 kw-hr= 1000 times 3600 J= 3600kJ or 3600000 J.
......I'm pretty sure that's correct.
2007-04-29 19:17:15 · answer #1 · answered by Anonymous · 1⤊ 0⤋
One joule is one watt-second. Using 1000 watts in a kilowatt and 3600 seconds in an hour, One kilowatt-hour = 1000*3600 = 3.6*10^6 joule
2007-04-30 02:17:21 · answer #2 · answered by gp4rts 7 · 0⤊ 0⤋
1 kW=1000W
1hour=3600sec
1W=1J/sec
Therefore, 1 kw-hr= 1000 times 3600 J= 3600kJ or 3600000 J.
2007-04-30 04:43:41 · answer #3 · answered by Anonymous · 0⤊ 0⤋
1kW/hour =1000W/hour formula of power=energy divide by time,energy measured in joule(J) hence energy=power*time hence 1000W per hour = 1000*60*60=3600000J note that 1hour must change to 3600seconds because the unit jocle is measures in S.I unit
2007-04-30 03:17:12 · answer #4 · answered by Robson J 1 · 0⤊ 0⤋
1 kWh = 3.6 MJ
and for unit conversion you can use google like that:
1kWh to joule
bye
2007-04-30 02:12:08 · answer #5 · answered by Enis T 2 · 0⤊ 0⤋