Question

how can you show that air exert pressure?​

Answer 1

Answer:

Explanation:

Air pressure or atmospheric pressure is the weight of air acting on a unit are of surface.Air exerts pressure in all directions.

Experiment to demonstrate Air pressure

Apparatus Required:Glass tumbler, water and card board.

Procedure :

Fill the glass tumbler completely with water.

Cover it with card board.

Note : There should not be air between water and card board.

Support the card board with you hand and invert the tumbler.Holding the glass tumbler gently, remove the hand.

Observation:

Cardboard does not fall because the air pressure is acting from all the direction..

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Answer 2

Explanation:

Because of high kinetic energy and negligible forces of attraction, the particle of gases move with high speed in all directions. when the fast moving gas particle hit the walls of the container, they exert a pressure called gas pressure