Question

state any three observation which tell us that air exerts pressure

Answer 1

Three observations which tells air exert pressure
1)leave the Ballon without tying its knot
2)when there is a heavy wind flowing so we are not able to balance ourselves.
3)when we flate balloon it its highest point, it will burst because of the air pressure from a body..
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Answer 2

Answer:

1: Difficulty in riding a bicycle against the direction of wind

2:Ease in rowing the sail boat in the direction of wind

3: Bursting of bicycle tube pipe by filling too much air