Question

How many watt-hours are there in 1000 joules?

Answer 1

Ans.   As we know,
1 watt x 3600s = 1 watt-hours
3600 Ws = 1 watt-hours .
3600 joules = 1 watt-hours
1 joules =    -    watt-hours
1000 joules = o       x 1000 watt-hours
1000 joules = 0.28 watt-hours
Hence there are 28 x 10~2 watt-hours in 1000 joules.