How many foot-pounds is equivalent to 1 BTU?

The correct response indicates that 1 BTU (British Thermal Unit) is equivalent to 778 foot-pounds. This relationship is based on the definition of a BTU, which is the amount of energy needed to raise the temperature of one pound of water by one degree Fahrenheit at a constant pressure. When translated into other energy units, the conversion to foot-pounds is derived from the work-energy principle, which states that energy can be expressed in various forms, including heat and mechanical work.

In practical terms, knowing this conversion can be crucial in fields such as mechanical engineering or thermodynamics, where you're often required to switch between energy measurements. Understanding this equivalency helps professionals apply heat energy calculations, machinery work output, and overall energy efficiency assessments effectively.

The other options represent different, but incorrect conversions for 1 BTU; thus clarifying that 778 is the precise figure establishes a strong foundation for students in energy calculations.