Page 84 - Genius Kidz Prudence Learning Sc-8

Pressure exerted by Liquids : with liquid mercury (because its

Liquids do not have a specific shape, they take density is high). The two ends of
the shape of the vessel in which they are glass tube are open and the two
poured. Pressure exerted by liquids depends points A and B (as shown in the
on their density and height of the liquid figure) are at same vertical
column. Liquids exert pressure on all the height and atmospheric
surfaces of the vessel containing it, unlike pressure. One end of the U-
solids which exert pressure on the area on tube say A is left free whereas

which force is acted upon. Let us design some end B is connected to a flexible
activities to prove that all the facts mentioned tube that is, in turn, connected
above are correct. with the point where the Water manometer
pressure inside the liquid needs to be
Manometer
measured. The pressure is measured with the
It is a device which is used for the help of difference in height of liquid column in
measurement of pressure. Manometer a U-shaped tube.
consists of a U-shaped glass tube that is filled

Activity 5

“Gases exert equal pressure in all the directions”. Prove it experimentally.
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PRESSURE EXERTED BY GASES Pressure exerted by gases is equal in all the
Gases also exert pressure. Just like a liquid, directions of a container which contains it.

gases too exert pressure in all the directions.

Deep sea fishes do not prefer to come to surface of water because blood in their body flows with a very high pressure
and pressure at surface of sea is less so it can result in the brusting out of their body if they try to swim at the surface
of sea.

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