Why does a stone sink when placed in water, whereas a cork floats on the surface of water?

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Solution

A stone placed in water usually sinks because the density of the stone is greater than the density of water.
A cork floats on the surface of the water because the density of the cork is lesser than the density of water.

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Sir/ma'am

A cork is heavier than needle but when a needle is placed in water it sinks but whereas a cork dosen't sink why? As the needle is lighter it should be also floating right.

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Why does a stone sink when placed in water, whereas a cork floats on the surface of water?

A stone placed in water usually sinks because the density of the stone is greater than the density of water.A cork floats on the surface of the water because the density of the cork is lesser than the density of water.

A stone placed in water usually sinks because the density of the stone is greater than the density of water.
A cork floats on the surface of the water because the density of the cork is lesser than the density of water.