Physics Help : How to Calculate Energy Used

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When calculating the amount of energy used in a home, determine the cost of an appliance against the kilowatt hours that it uses. Calculate energy, and weight it against what an electric company charges, with help from a science teacher in this free video on energy and physics.

Expert: Steve Jones
Bio: Steve Jones is an experienced mathematics and science teacher.
Filmmaker: Paul Volniansky
  1. ehow
  2. physics
  3. science
  4. physical science
  5. calculations
  6. circuit boards
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Комментарии
Автор

Can you tell me how to calculate energy efficiency if:
a kettle has a power rating of 4560W & was left for 4 mins.IF kettle uses 320Kj of energy to ehat the water, what is the & of efficiency of the kettle?

HarleyEsguerra
Автор

So does that mean that the labels that represent the amount of power a certain system generates is measured in terms of hours? i know that in physics, we calculate power in terms of how much work is done per every second. So, this is kind of confusing to me.

Ghaiyst