Question

question 7
which is an example of thermal energy?
a using a tv remote control to change the channel
b water at the top of a waterfall
c boiling water in a pot
d a rock falling off a cliff

Explanation:

To determine the example of thermal energy, we analyze each option:

• Option A: Using a TV remote involves electromagnetic energy (infrared signals), not thermal energy.
• Option B: Water at the top of a waterfall has gravitational potential energy, not thermal energy.
• Option C: Boiling water in a pot involves heat transfer, and boiling is a result of thermal energy causing the water to change state (from liquid to gas). Thermal energy is related to the internal energy of a substance due to temperature, and boiling water has thermal energy associated with its heat.
• Option D: A rock falling off a cliff involves gravitational potential energy converting to kinetic energy, not thermal energy.

Answer:

C. boiling water in a pot