Question

Introduction to relative density
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Answer 1

Answer:

Relative Density. Relative density (specific gravity) is the ratio of the density of a solution to the density of a reference solution (usually water at 4°C).

Explanation:

Relative density, or specific gravity,[1][2] is the ratio of the density (mass of a unit volume) of a substance to the density of a given reference material. Specific gravity for liquids is nearly always measured with respect to water at its densest (at 4 °C or 39.2 °F); for gases, air at room temperature (20 °C or 68 °F) is the reference. The term "relative density" is often preferred in scientific usage.