Question

explain an activity to show that air exerts pressure​

Answer 1

Answer:

Explanation:

Take a narrow necked bottle with a side opening, a peeled hard boiled egg and a matchstick.

Set the egg on the top of the bottle. The egg won't go into the bottle.It is too large to fall inside the bottle. Since pressure is equal both inside and outside of the bottle, so no extra force is acting on it.

Now strike a matchstick and drop it into the bottle and quickly set the egg on the top of the bottle as before. The matchstick flame heats the bottle inside due to which air in the bottle expands and some of it escapes out of the side opening of the bottle. Now close the opening. The matchstick gets extinguished and the air in the bottle cools again and gets contracted creating a low pressure inside the bottle.

Now invert the bottle and blow air into the bottle through the side opening. This creates high pressure inside the bottle and the egg is kicked out of the bottle.

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