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प्रश्न
If a fresh egg is put into a beaker filled with water, it sinks. On dissolving a lot of salt in the water, the egg begins to rise and then floats. Why ?
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उत्तर
When a large amount of salt is dissolved in water, the density of salt solution becomes higher than pure water. It is because of its higher density, the salt solution exerts a greater upward buoyant force on the egg, making it rise and then float.
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संबंधित प्रश्न
Relative density of a substance is expressed in g cm-3.
A body while floating sinks deeper in a liquid of low density than in a liquid of high density.
When does an object float or sink when placed on the surface of a liquid ?
State three factors on which the pressure at a point in a liquid depends.
How does the liquid pressure on a diver change if:
the diver moves to the greater depth
The S.I. unit of pressure is :
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).
Calculate the hydrostatic pressure exerted by water at the bottom of a beaker. Take the depth of water as 40 cm, the density of water 1000 kgm−3 and g = 9.8 ms−2.
Select the correct option:
The phenomenon due to which a solid experiences upward force when immersed in water is called:
Higher Order Thinking Skill.
How does a fish manage to rise up and move down in water?
