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Created page with "==Key Stage 4== ===Meaning=== '''Energy efficiency''' is a ratio of Useful Energy transferred to total energy put into a [[system]..."
==Key Stage 4==
===Meaning===
'''Energy efficiency''' is a [[ratio]] of [[Useful Energy]] [[Energy Transfer|transferred]] to [[Total Energy|total energy]] put into a [[system]].
===About Efficiency===
: '''Energy efficiency''' is a [[measure]] of how effectively [[energy]] is [[Energy Transfer|transferred]] from one [[Energy Store|energy store]] into an intended [[Energy Store|energy store]].
: '''Efficiency''' may be written as a [[percentage]] or as a [[decimal]].
: '''Efficiency''' as a [[percentage]] can never be greater than 100% and as a [[decimal]] can never be greater than 1 because you can never get more [[energy]] out than you put in due to [[Conservation of Energy]].
===Equation===
<math>Efficiency = \frac{Useful_ Energy_ Out}{Total_ Energy_ In}</math>
===Meaning===
'''Energy efficiency''' is a [[ratio]] of [[Useful Energy]] [[Energy Transfer|transferred]] to [[Total Energy|total energy]] put into a [[system]].
===About Efficiency===
: '''Energy efficiency''' is a [[measure]] of how effectively [[energy]] is [[Energy Transfer|transferred]] from one [[Energy Store|energy store]] into an intended [[Energy Store|energy store]].
: '''Efficiency''' may be written as a [[percentage]] or as a [[decimal]].
: '''Efficiency''' as a [[percentage]] can never be greater than 100% and as a [[decimal]] can never be greater than 1 because you can never get more [[energy]] out than you put in due to [[Conservation of Energy]].
===Equation===
<math>Efficiency = \frac{Useful_ Energy_ Out}{Total_ Energy_ In}</math>