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प्रश्न
What is meant by the term buoyancy?
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उत्तर
The property of a liquid to exert an upward force on a body immersed in it is called buoyancy.
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संबंधित प्रश्न
A body while floating sinks deeper in a liquid of low density than in a liquid of high density.
The weight of a body floating in a liquid is ........
Define the term Density of a substance.
Explain the meaning of the statement
‘Relative density of aluminium is 2.7’.
What is the law of floatation?
Complete the following sentence :
Pressure at a depth h in a liquid of density p is ......................
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.
Complete the following sentence :
A piece of wood is held under water. The upthrust on it will be ___________ the weight of the wood piece.
Two spheres A and B, each of volume 100 cm3 is placed on water (density = 1.0 g cm−3). The sphere A is made of wood of density 0.3 g cm−3 and sphere B is made of iron of density 8.9 g cm−3.
- Find:
- The weight of each sphere, and
- The upthrust on each sphere.
- Which sphere will float? Give reason.
State whether true or false. If false, correct the statement.
The weight of fluid displaced determines the buoyant force on an object.
