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OpenStudy (anonymous):
an electric motor uses 6 kW at an efficiency of 63%. How much power does it deliver?
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OpenStudy (sidsiddhartha):
\[\large efficiency=\frac{ output ~power}{ input~power }*100 \]
OpenStudy (unklerhaukus):
\[\text{efficiency}=\frac{\text{output power}}{\text{input power}}*100\%\]
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