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An egg sinks in fresh water, but it floa...

An egg sinks in fresh water, but it floats when a suitable quantity of salt is mixed in that water. Why?

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An egg is heavier than the weight of an equal volume of water and hence it sinks in water. But when a suitable quantity of salt is mixed in water, the density of this saline water becomes greater than the density of the egg and so it floats.
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