Question

The temperature of water at the bottom of a waterfall is higher than that of the water at the top, because

• A. falling water absorbs heat from the sun
• B. kinetic energy of the falling water is converted into heat
• C. water at the bottom has greater potential energy
• D. the rocks on the river bed give out heat

Answer 1

The correct option is B

kinetic energy of the falling water is converted into heat

1. When water falls from a height, its stored potential energy changes into kinetic energy.
2. When water strikes the ground, a part of its kinetic energy changes into heat, and this heat raises the temperature of the water.

Hence, B) is the correct option.