Noun
the ratio of the density of something to the density of a standard
Source: WordNetIf the reference material is water then a substance with a relative density (or specific gravity) less than 1 will float in water. Source: Internet
A substance with a relative density greater than 1 will sink. Source: Internet
For example, an ice cube, with a relative density of about 0.91, will float. Source: Internet
For true (in vacuo) relative density calculations air pressure must be considered (see below). Source: Internet
Hydrometer main The relative density of a liquid can be measured using a hydrometer. Source: Internet
If a substance's relative density is less than one then it is less dense than the reference; if greater than 1 then it is denser than the reference. Source: Internet