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प्रश्न
The diagram given below show a body floating in three different liquids. A, B and C at different levels.
(a) In which liquid does the body experience the greatest buoyant force?
(b) Which liquid has the least density?
(c) Which liquid has the highest density?

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उत्तर
a) Buoyant force is same in each case as the wt. of the body is same in each case and Buoyant force is equal to the weight of the liquid displaced by the immersed part of the body which balances the wt. of body.
(b) The liquid A has the least density as body immerses the maximum.
(c) Liquid C has the highest density as the body immerses the least.
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संबंधित प्रश्न
The S.I. unit of density is ..........
Differentiate between thrust and pressure.
Describe a simple experiment to demonstrate that a liquid enclosed in a vessel exerts pressure in all directions.
The diagram below in Fig. 4.12 shows a device which makes the use of the principle of transmission of pressure.

- Name the parts labelled by the letters X and Y.
- Describe what happens to valves A and B and to the quantity of water in the two cylinders when the lever arm is moved down.
- Give reasons for what happens to valves A and B in part (ii).
- What happens when the release valve is opened?
- What happens to valve B in cylinder P when the lever arm is moved up?
- Give a reason for your answer in part (v).
- State one use of the above device.
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Pressure at all points at the same depth is ....................
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Select the correct option:
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Is pressure a vector quantity?
Is thrust a scalar or vector quantity?
State whether true or false. If false, correct the statement.
The weight of fluid displaced determines the buoyant force on an object.
