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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
A body experiences the same buoyant force while floating in water or alcohol.
Name the S.I. unit of density. How is it related to g Cm-3?
What is the law of floatation?
Explain why an iron needle sinks in water, but a ship made of iron floats on water.
Deduce an expression for the pressure at depth inside a liquid.
How does the liquid pressure on a diver change if :
The diver moves horizontally?
(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).
A body of mass 3.5 kg displaces 1000 cm3 of water when fully immersed inside it. Calculate:
- the volume of body,
- the upthrust on body and
- the apparent weight of body in water.
Pressure in a water pipe on the ground floor of a building is 100,000 Pa. Calculate the pressure in the water pipe on the first floor at a height of 3 m. [Density of water = 1000 kgm−3 ; g = 10 ms−2]
State whether true or false. If false, correct the statement.
The weight of fluid displaced determines the buoyant force on an object.
