Question

hands moving on a battery - operated clock is an example of what kind of energy conversion?
a. kinetic energy being converted to chemical potential energy
b. gravitational potential energy being converted to heat energy
c. heat energy being converted to gravitational potential energy
d. chemical potential energy being converted to kinetic energy

Explanation:

A battery - operated clock uses a battery which stores chemical potential energy. When the clock operates, the hands move, and this movement is kinetic energy. So the energy conversion is from chemical potential energy (stored in the battery) to kinetic energy (of the moving clock hands). Option A is incorrect as it reverses the conversion. Option B is incorrect as gravitational potential energy and heat energy are not involved in this way. Option C is also incorrect as heat energy and gravitational potential energy are not the relevant forms here.

Answer:

D. Chemical potential energy being converted to kinetic energy