Question

state the relation between commercial unit of energy and joules

Answer 1

SI unit of energy is Joule. Commercial unit of energy is kWh. 1 kWh = 1 kW x 1 h = 1000 W x 3600 s 1 watt - second = 1 joule 1 kWh = 3600000 J

Answer 2

1 kwh = 1000wh
1h=60*60=3600s
1kwh=1000*3600s*w
1kwh=3600000*1j\1s*1s
1kwh=3.6*10^6j