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प्रश्न
Select the correct option:
When an object sinks in a liquid, its:
विकल्प
buoyant force is more than the weight of object
buoyant force is less than the weight of an object
buoyant force is equal to the weight of the object
none of the above
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उत्तर
buoyant force is less than the weight of object
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संबंधित प्रश्न
A boy get into a floating boat.
What happens to the buoyant force on the boat ?
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
Which of the following will sink or float on water? (Density of water = 1 g Cm-3)
body D having density 0.85 g m-3
What is the law of floatation?
State three factors on which the pressure at a point in a liquid depends.
Explain why a gas bubble released at the bottom of a lake grows in size as it rises to the surface of the lake.
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.
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 :
How is the upthrust related to the volume of the body submerged in a liquid?
You are provided with a hollow iron ball A of volume 15 cm3 and mass 12 g and a solid iron ball B of mass 12 g. Both are placed on the surface of water contained in a large tub.
- Find upthrust on each ball.
- Which ball will sink? Give a reason for your answer (Density of iron = 8.0 g cm-3)
