Question

Diffreans between density and reletive density

Answer 1

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Mass and volume determine the physical size, which is called density, and is characteristic of each substance.
The ratio of mass and volume is a constant size called density.

Relative density is the ratio of the density of that substance to a certain temperature and the density of water at the same temperature or some other temperature used as a reference.

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Answer 2

Mass per unit volume of a substance is called density.
The ratio between the density of a substance and density of water is called relative density.

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