Question

1.

Why do some people suffer from nose bleeding at higher altitudes.

2.
Prove that pressure exerted by water at the bottom of the container depends on the
height of its column. (With the help of an activity)​

Answer 1

Answer:

1.Air pressure goes on decreasing as we go higher up, so at high altitudes, the atmospheric pressure becomes less than the pressure exerted by the blood inside the body. This causes some of the blood vessels burst and the nose starts bleeding.

2.ACTIVITY.....TO SHOW THAT PRESSURE EXERTED BY LIQUID AT THE BOTTOM OF THE CONTAINER DEPENDS ON HEIGHT OF COLUMN..

PROCEDURE:

◆Take a plastic bottle or a beaker which has tube like structure.

◆Fill the container full with water.

◆Now with any sharp object make holes to the container one by one from top to bottom.

◆You can observe that water flowing out from top holes are coming with less force and falling just infront of the beaker.But the water flowing out from bottom holes are coming with higher force and falling far from container.

◆Repeat the same experiment with half filled container . you will notice change in flow of water outside.

hope it helps......

Answer 2

1.People suffer from nose bleeding at higher altitudes because the blood pressure in the blood vessels inside the nose increases and become more than the atmospheric pressure.The blood vessels rapture as an outcome and it results in the bleeding of nose.

2.Pressure exerted by water at the bottom of the container depends on height of its column.We can prove this with the help of an activity:-

Materials required:A spouting can and water

Procedure:

i)Make three holes in the can at different heights.

ii)Put the can under an open tap.

iii)Observe the force with which the water comes out of each hole.

Result:You would observe the difference in the pressure exerted by observing the distance to which water oozes out from the different holes and falls.

Hope it helps!!! :)