Question

Define watt-hour.How many joules are equal to 1 watt-hour?

Answer 1

The watt-hour is a unit of energy equivalent to one watt $1w$ of power expended for one hour $1h$ of time.

An energy expenditure of $1Wh$ represents 3600 joules $\left(3.600\times {10}^{3}J\right)$

To obtain joules when watt-hours are known, multiply by $\left(3.600\times {10}^3\right)$