A battery powers a circuit for a small noisy fan. The fan's motor gets warm as it turns. What energy transformations are taking place?

Chemical energy to electrical energy to mechanical and thermal energy

Explanation:

In the rotating fan, the chemical energy stored in the battery is used to generate electrical energy.

The electrolytes within the battery undergoes chemical reactions that produces electric current.

answer: 802.3 kilo joules of energy represents 191.75 kilo calorie of energy.

explanation:

energy released during combustion of one mole methane = 802.3 kilo joules

if 1 kilo joule = 0.239006   kilo calorie

then ,802.3 kilo joule will be = 802.30.239006 kilo calorie

802.3 kilo joule = 191.75 kilo calorie

hence, the energy in kilo calorie is 191.75 kilo calorie.