Define specific gravity and explain how it rela... - SS1 Physics Pressure And Properties of Matter Question

Specific gravity is a dimensionless quantity that compares the density of a substance to the density of a reference substance, usually water. It is calculated by dividing the density of the substance by the density of water. Specific gravity is useful in determining the relative density of a substance and comparing it to the density of water. If the specific gravity of a substance is less than 1, it means that the substance is less dense than water and will float on its surface. If the specific gravity is greater than 1, the substance is denser than water and will sink.