Question

describe an experiment to demonstrate that air exerts pressure

Answer 1

Take an empty soda bottle with minimum thickness open the cap. Hold it in the mouth and suck all the air  with a vacuum pump. What happens to the bottle? The shape of the bottle will be altered. Why? When we suck the air out of it, the air present out side the bottle will exert pressure on the bottle in all possible directions. Therefore the bottle is crushed.

Answer 2

Answer:

We have experienced that when we blow a balloon, the balloon becomes tight. If we try to fill more air, then the balloon will burst after an extent. This happens because air exerts pressure

We have also experienced the movement of fringes of windows and doors of our houses when wind blows in a high speed. This also happens because air exerts pressure