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**SOLVED - Horsepower to kilowatt-hours?**

## Homework Statement

In the English system of units, power is expressed as horsepower (hp) instead of watts, where 1 hp=746 W. Horsepower is often used for motors and automobiles.

How many kilowatt-hours of energy is produced when you run a 23.0 hp motor for 240 minutes?

## Homework Equations

1 hp=746 W

1000 W=1 kW

60 min = 1 hr

60 s = 1 min

1 W = 1 J/s

## The Attempt at a Solution

I started by converting horsepower to Watts, then dividing by 1000 to get kilowatts. I then multipled by 3600 (60*60) to convert to kWs to kWh. I am then left with 4 hr (240 min) to factor in somewhere, but I don't know how to relate it to kWh with all the conversions happening. I tried multiplying by 4 but it said it was wrong.

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