Question

derive one kilowatts hour of power

Answer 1

one kilo watts hour =10^3 watt x 1 hour
=10^3 x 3600 watt.sec
=3.6 x 10^6 j

Answer 2

1 kw h=1kw×1h
=1000w ×3600s
=3600000j
=3.6×10^6 j