Question

A barbecue grill is rated at 1,500 Btu per hour. How many foot-pounds of energy are released in one hour?

1,167,000 foot-pounds

1.9 foot-pounds

0.5 foot-pounds

954,000 foot-pounds

Answer 1

The problem is simply asking us to convert the units from BTU to units of foot pound force. To do this, we use the conversion ratio 1 BTU/778.169 ft-lbf. We do as follows:

1500 BTU/hr ( 777.169 lbf-ft / 1 BTU ) = 1165753.5 lbf-ft/hr

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