Question

how density varies with temperature

Answer 1

Hey mate..

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Density- 
Density of a substance is its mass per unit volume. It varies with temperature and pressure.

Density = Mass/Volume

It is related to sinking and floating in water. If a substance is denser than water it will sink in water and settles down at bottom. If a substance floats on water it is less denser than water. For example, oil droplets floats on water surface while sand particles settle down at bottom.

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@racks