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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
Name the force which makes heavy objects appear light when immersed in a liquid.
When does an object float or sink when placed on the surface of a liquid ?
The density of water is 1.0 g Cm-3. The density of iron is 7.8 × 10″3 g Cm-3. The density of mercury is 13.6 g Cm-3.
Ans the following:
Will a piece of iron float or sink in water?
(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).
Describe an experiment to show that a body immersed in a liquid appears lighter than it really 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.
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).
What is meant by up thrust?
The magnitude of buoyant force acting on an object immersed in a liquid depends on ______ of the liquid.
Write about buoyant force.
