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प्रश्न
The weight of a body is more than the buoyant force experienced by it, due to a liquid. The body will
पर्याय
sink
float with its some part outside the liquid
float just below the surface of liquid
float with whole of its volume above the surface of liquid.
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उत्तर
sink .
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संबंधित प्रश्न
Relative density of a substance is expressed in g cm-3.
Which of the following will sink or float on water? (Density of water = 1 g Cm-3)
body C having density 1100 kg m-3
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.
A piece of wood if left under water comes to the surface. Explain the reason.
It is easier to lift a heavy stone under water than in air. Explain.
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.
Select the correct option.
Thrust acting perpendicularly on the unit surface area is called
The blood pressure reading of a patient is recorded 160/100. Express the lower pressure in SI units.
[Take density of mercury as 13.6 × 103 kgm−3 and the value of ‘g’ as 10 ms−2]
Complete the analogy.
Downward force : Weight :: Upward force offered by liquid : ______
