Question

convert 378*10^6 J into kWh....

Answer 1

A watt is energy consumed at the rate of one joule per second.

There are 3600 seconds in an hour. There are 1000W in a kW (the k means times 1000).

So:

kWh x 3600s/h x 1000 = J

A little algebra to reverse:

1 kWh = J/3,600,000

So divide the number of joules by 3.6x10^6 to get the number of kWh.

Answer 2

378*10^6 / 36*10^5=105kWh