Question

using refrigeration systems
what happens to the thermal energy of the air inside a building when an air conditioner is turned on?
thermal energy in the building decreases.
thermal energy in the building increases.
thermal energy in the building remains the same.

Explanation:

When an air conditioner is turned on, it removes heat (thermal energy) from the air inside the building. This is based on the principle of refrigeration where the air conditioner's cycle involves absorbing heat from the indoor environment and expelling it outside. So, the thermal energy of the air inside the building decreases.

Answer:

Thermal energy in the building decreases.