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Physics
Energy – forces doing work
Power and Efficiency
Efficiency Equation
Efficiency Equation
What You Need to Know
Recall and use the equation for efficiency:
efficiency
=
useful energy transferred by the device
total energy supplied to the device
\text{efficiency} = \frac{\text{useful energy transferred by the device}}{\text{total energy supplied to the device}}
efficiency
=
total energy supplied to the device
useful energy transferred by the device
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