A boat's battery has 325 watt-hours of available energy. How many joules of energy will it supply over its lifetime?

watt-hours
joules-of-energy

#1

A boat’s battery has 325 watt-hours of available energy. How many joules of energy will it supply over its lifetime?

Answer:

joule = 2.78 × 10^(−4) watt-hour, so
325 watt-hours = 325/(2.78 x 10^(-4)).
=~ 117 x 10^4 J to 3 significant digits.