Energy is measured in joules and so this means that power is the amount of joules supplied in a certain period of time. When doing calculations of power, you need to have the energy measured in joules and time measured in seconds.
1 watt is the same as 1 joule of energy transferred in a second. (1 watt = 1 joule per second)
There are 1000 watts in 1 kilowatt (kW).
Different appliances use different amounts of power, depending on their function. All electrical appliances have a stamp or a sticker which indicates the power rating. If you look at your hairdryer or kettle you should find it easily.
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Answer:
Energy is measured in joules and so this means that power is the amount of joules supplied in a certain period of time. When doing calculations of power, you need to have the energy measured in joules and time measured in seconds.
1 watt is the same as 1 joule of energy transferred in a second. (1 watt = 1 joule per second)
There are 1000 watts in 1 kilowatt (kW).
Different appliances use different amounts of power, depending on their function. All electrical appliances have a stamp or a sticker which indicates the power rating. If you look at your hairdryer or kettle you should find it easily.