Question

A furnace is rated 4000 BTU per hour. How many foot pounds of energy are released in one hour?

- 5.1 foot pounds

- 2,456,000 foot pounds

- 0.2 foot pounds

- 3,112,000 foot pounds

Answer 1

To solve this we are going to use a conversion factor. We know that 1 BTU per hour is approximately 778 foot-pounds of energy per hour, so our conversion factor will be:
`(778foot-pound)/(1BTU)`.

Now we just need to multiply 4000 BTU by our conversion factor:

`4000BTU*(778foot-pound)/(1BTU)=3112000foot-pound`

We can conclude that the furnace released 3,112,000 foot pounds of energy in one hour.