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प्रश्न
For a given object, the buoyant force in liquids of different ______ is ______.
पर्याय
the same
density
different
area
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उत्तर
For a given object, the buoyant force in liquids of different density is the same.
संबंधित प्रश्न
The S.I. unit of density is ..........
The buoyant force experienced by a body when floating in saltwater is ....... to or same that of when floating in pure water.
Which of the following will sink or float on water? (Density of water = 1 g Cm-3)
(a) body A having density of 500 kg m-3
A plastic cube is released into the water. Will it sink or come to the surface of the water?
How is the unit bar related to the S.I. unit pascal?
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.
Complete the following sentence :
Pressure at a depth h in a liquid of density p is ......................
(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 block of wood is floating on water with its dimensions 50 cm x 50 cm x 50 cm inside water. Calculate the buoyant force acting on the block. Take g = 9.8 N kg-1.
In a fluid, buoyant force exists because the pressure at the ______ of an object is greater than the pressure at the top.
