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प्रश्न
Describe a simple experiment to demonstrate that a liquid enclosed in a vessel exerts pressure in all directions.
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उत्तर
Take a can or large plastic bottle filled with water. Place it on a horizontal surface. Make a series of holes in the wall of the vessel anywhere below the free surface of the liquid. The water spurts out through each hole. This shows that the liquid exerts pressure at each point on the wall of the bottle.
Liquid exerts pressure at all points in all directions
संबंधित प्रश्न
Why does a piece of ice float on water?
What is meant by pressure? State its S.I. unit.
State three factors on which the pressure at a point in a liquid depends.
State the laws of liquid pressure.
The S.I. unit of pressure is :
The pressure P1 at the top of a dam and P2 at a depth h form the top inside water (density p) are related as :
(i) The diameter of neck and bottom of a bottle are 2 cm and 10 cm, respectively. The bottle is completely filled with oil. If the cork in the neck is pressed in with a force of 1.2 kgf, what force is exerted on the bottom of the bottle?
(ii) Name the law/principle you have used to find the force in part (a).
What do you understand by the term upthrust of a fluid? Describe an experiment to show its existence.
Calculate the hydrostatic pressure exerted by water at the bottom of a beaker. Take the depth of water as 40 cm, the density of water 1000 kgm−3 and g = 9.8 ms−2.
What do you understand by the term “Buoyancy”.
