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प्रश्न
Complete the following sentence :
A piece of wood is held under water. The upthrust on it will be ___________ the weight of the wood piece.
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उत्तर
A piece of wood is held under water. The upthrust on it will be more than the weight of the wood piece.
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संबंधित प्रश्न
What do you mean by buoyancy?
Relative density of a substance is expressed in g cm-3.
What is the cause of buoyant force ?
The density of brass is 8.4 g cm-3. What do you mean by this statement?
How is the unit bar related to the S.I. unit pascal?
A small block of wood is completely immersed in (i) water, (ii) glycerine and then released. In each case, What do you observe? Explain the difference in your observation in the two cases.
A body weighs 450 gf in air and 310 gf when completely immersed in water. Find
(i) The volume of the body,
(ii) The loss in weight of the body, and
(iii) The upthrust on the body.
State the assumption made in part (i).
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)
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.
Complete the following sentence.
Mass = .................... × density
