Question

show with the help of an experiment that air exerts pressure

Answer 1

take a metal can and fill some water in it. hear it till steam starts forming. hear it for a few more minutes. now, stop hearing and pour some cold water in it. The van gets crushed.
This shows that air experts pressure.

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