Which statement describes one characteristic of an operating electrolytic cell?

A. It produces electrical energy.
B. It requires an external energy source.
C. It uses radioactive nuclides.
D. It undergoes a spontaneous redox reaction.

B

Explanation:

The mechanism of this process: the electrolytic cell converts the electrical energy to chemical energy, using external energy source.

b.) potential energy was transformed into kinetic energy

Explanation:

According to the law of conservation of energy, energy is neither created nor destroyed but transformed from one form to another in a system.

So, in this system, energy is not created neither is it destroyed.

The increase in kinetic energy of the car is due to the conversion of potential energy to kinetic energy. Potential energy is due to the position of a body. As the car winds down the hill slope, the potential energy is transformed to kinetic energy. Also, the velocity of the body increases.