14. Which equation is true? 1,000 watt > 1 horsepower 10 horsepower < 5,000 watts 1,000 watt \( =100 \) horsepower 1,000 horsepower \( >1 \) watt
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1 horsepower is equivalent to approximately 746 watts. This conversion factor is crucial for comparing values given in the two different units. Show more…
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What power in $\mathrm{kW}$ is supplied to a $12.0$ -hp motor having an efficiency of $90.0$ percent when it is delivering its full rated output? From the definition of efficiency, $$ \text { Power input }=\frac{\text { Power output }}{\text { Efficiency }}=\frac{(12.0 \mathrm{hp})(0.746 \mathrm{~kW} / \mathrm{hp})}{0.900}=9.95 \mathrm{~kW} $$
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