Question

describe an experiment to prove that liquid exert pressure

Answer 1

The fact that liquids exert pressure can be demonstrates from the fact that if we have a liquid (say water) kept in a container then is we make an opening in it then the water will rush out through the hole with some speed. This is due to the fact that water exerts some pressure on the walls of the container.

This is a very simple way to show liquids exert pressure...

Let us take a big plastic mug.

Now, we can make holes anywhere on the container to demonstrate that pressure is exerted by liquid there.

We can make holes on sides at different heights

We can also make holes at the at the bottom of the mug

and anywhere else for that matter.

We would see a stream of water coming out of the mug making a parabola trajectory.

Answer 2

Take a plastic glass and mark 3 holes starting from the base then middle and then near the brim. Fill the glass with water. You will observe that the water is coming out from the 3 holes. The water coming out from the 3rd hole covers more distance than 2nd and water coming out from 1st hole covers least disance. This shows that water exerts pressure at different levels and the pressure increases with increase in depth.