Question

how many times can energy change forms?
never
an infinite number of times
once

Explanation:

Energy can change forms multiple times. According to the law of conservation of energy, energy is neither created nor destroyed but can change forms. In real - world scenarios, energy undergoes numerous transformations. For example, in a power plant, chemical energy (from fuel) is converted to thermal energy, then to mechanical energy, and finally to electrical energy. And this electrical energy can further be converted to light, heat, or other forms in various electrical devices. So, energy can change forms an infinite number of times as long as there are processes and systems for these transformations.

Answer:

an infinite number of times