Question

give some example to prove that air exerts pressure​

Answer 1

Answer:

Some daily life experiences that show that air exerts pressure :

1. You find it easier to row the boat when the wind is blowing behind you.
2. The wind coming from the back help in flying kite.
3. When we suck from the straw, the liquid rises in it.
4. The medicine enters the syringe when a piston is pushed out.

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Answer 2

Aim:

Aim: To prove that air exerts pressure.

Materials required:

glass tumbler, water, cardboard

Procedure:

1. Fill the glass tumbler with water up to its brim, such that there are no air bubbles inside it.

2. Keep a rectangular piece of cardboard on the mouth of the tumbler.

3. Giving the cardboard support with one hand, invert the tumbler.

4. Slowly remove your hand.

5. Note your observations.

6. Now, fill one-fourth of the tumbler with water and the remaining three-fourths with air.

7. Again, place the cardboard on the mouth of the tumbler. Invert the tumbler.

8. Note your observations.

Observations:

In the first case, you observe that the cardboard is stuck to the tumbler even when you remove your hand. This happened because the air pressure was acting upwards on the paper and the cardboard did not fall as shown in the picture. However, in the second case, the pressure of air inside the tumbler acted downwards and pushed the cardboard out and the water started running.