Explain the following:
An egg sinks in fresh water, but floats in a salt solution

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Solution

As the density of strong salt solution is denser than fresh water, it exerts more upthrust on the egg that balance the weight of the egg hence the egg sinks in fresh water but floats on a strong salt solution.

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Q. 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?

Q. A fresh egg sinks in pure water, whereas it floats in salty water. This is because
(a) salt water is denser than pure water.
(b) the egg is less dense than pure water.
(c) salt water is less dense than an egg.
(d) salt water is denser than the egg.

Explain the following :
(a) Icebergs floating in sea are dangerous for ships.
(b) An egg sinks in fresh water, but floats in a strong salt solution.
(c) A toy balloon filled with hydrogen rises to the ceiling, but if filled with carbon dioxide sinks to the floor.
(d) As a ship in harbour is being unloaded, it slowly rises higher in water.
(e) A balloon filled with hydrogen rises to a certain height and then stops rising further.
(f) A ship submerges more as it sails from sea water to river water.

Explain why an iron nail floats on mercury, but it sinks in water.

Q. When a fresh egg is put into a beaker filled with water, it sinks. When the same egg is put in a strong salty water, then it floats. Which of the following is the incorrect statement in this context ?
(1) salt water enters into egg by osmosis and makes it lighter
(2) salt water exerts more buoyant force
(3) salt water is denser than tap water
(4) upthrust exerted by a liquid depends on its density

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Explain the following:An egg sinks in fresh water, but floats in a salt solution

As the density of strong salt solution is denser than fresh water, it exerts more upthrust on the egg that balance the weight of the egg hence the egg sinks in fresh water but floats on a strong salt solution.

Explain the following:
An egg sinks in fresh water, but floats in a salt solution