Relative Density
Definition: Ratio of Density of a Substance to Density of Water
Formula: RD = Density of Substance ÷ Density of Water
Alternate Formula: RD = Mass of Substance ÷ Mass of Equal Volume of Water
Unit: No Unit (Dimensionless)
RD of Water: 1
Substance with RD > 1: Sinks in Water
Substance with RD < 1: Floats on Water
Applications: Determining Purity of Metals & Liquids
