Density - Mass per Volume

The video explains how the density of substances changes with temperature and pressure, generally decreasing with higher temperatures and lower pressures. Water is an exception, being most dense at 4°C and becoming less dense as the temperature moves away from this point.

How does temperature generally affect the density of substances?

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What happens to the density of substances when pressure is reduced?

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Why is water considered unusual in terms of density?

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At what temperature is water most dense?

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What occurs to the density of water when the temperature deviates from 4°C?

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