Question

prove that air exerts pressure with the help of an activity

Answer 1

We need a Balloon(Make sure it does not have any holes in it).

Blow into the balloon's mouth until you find it difficult to blow more. Then tie the mouth of the balloon and if you don't know how to do it, tale the help of an elder. After tying it's mouth, try to press the balloon using both your hand on opposite sides. You will feel an opposite force that doesn't lets you pressing the balloon.

This activity shows that air exerts pressure.

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.