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dimensionless
{{merge|density}}
{{merge|density}}
'''Specific gravity''' is a property of any given sample of matter, defined as the [[ratio]] of its [[density]] to that of [[water]] at a given temperature.
'''Specific gravity''' is a property of any given sample of matter, defined as the [[ratio]] of its [[density]] to that of [[water]] at a given temperature. It is thus [[dimensionless]].
Substances are denser than water if they have a specific gravity greater than 1, and less dense if it is less than 1. However, it does not follow that water has a specific gravity of 1, since the density of water varies according to the temperature.
Substances are denser than water if they have a specific gravity greater than 1, and less dense if it is less than 1. However, it does not follow that water has a specific gravity of 1, since the density of water varies according to the temperature.