Thinking Critically Problem Solving One
jelly-filled donut contains an amount of energy
equal to about 0.5 kilowatt-hours. If that energy
could be converted into electrical energy, how
long would it keep a 15-watt night light lit?
1/2 Kilowatt hours is 500 watts/ hours so the doughnut gives 500 watts per hour to a 15 watt load. You can run your light for 33.33 hours on one doughnut. Then you need another doughnut.
