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How do you calculate the efficiency of energy transfer?

Answer 1

Useful energy/ total energy * 100 = efficiency %

For instance, a lightbulb that generates 20J of light also generates 80J of heat (waste energy). The lightbulb's efficiency is 20% because its efficiency is 20/100 * 100 = 20%.

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Answer 2

Connor Anderson

The efficiency of energy transfer is calculated by dividing the useful energy output by the total energy input, and then multiplying the result by 100 to express it as a percentage. The formula is:

Efficiency = (Useful energy output / Total energy input) * 100

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.