Why does a saw become warm when it is used to cut a log of wood ? State the energy transformation taking place.

Why does our palm become warm when we rub them together?

State the energy conversion taking place in a solar cell.

A nail becomes warm when it is hammered into a plank. Explain why ?

State the energy transformation taking place when a boy is riding a bicycle.

Answer the following questions: In an assembly hall microphones and loudspeakers are used. What is the energy transformation taking place?

What is the energy transformation that takes place in a solar cell?