what is air pressure explain with the help of an activity
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As water is poured over the can, some steam in the can condenses into water, reducing the amount of air inside. The pressure of air inside the can decreases than the pressure exerted by the air from outside the can. As a result the can gets compressed. This activity again confirms that air exerts pressure.
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atmospheric pressure is defined as the force per unit area exerted against a surface by the weight of air above that surface.
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