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Question

what is meant by density?

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Solution

Density of a substance can be defined as mass per unit volume of a substance.

Thus, Density= mass/ volume

where, mass= mass of the substance and volume= volume of the substance.

Density is affected by temperature and pressure.

i. As we increase pressure, the volume decreases and thus density increases.

ii. With increase in temperature, a substance expands which increases its volume. So, its density decreases.


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