Question

The air we exhale is cool. True or false​

Answer 1

Answer:

True...................

Answer 2

Explanation:

ya , it's true that " The air we exhale is cool"

reason:

1. When air is suddenly exhaled out into a larger volume through the narrow opening, air undergoes adiabatic expansion.
2. When we place our hand near the out flowing air heat energy is being absorbed from our hand.
3. Hence we feel cold.
4. Opposite is in the case when a gas is compressed.