how can you say that air exerts pressure
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Answer: the molecules continually call ending with each other and with the walls of container. When a molecule or lights with wall exert small force on the wall the pressure exerted by the gas is due to the sum of all this collision forces. That more particles that will hit on the wall ,the higher the pressure.
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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
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