Question

What is density?

What is relative density?

What is the SI unit of density?​

Answer 1

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1. What is density?

Density is a measure of mass per volume.

The average density of an object equals its total mass divided by its total volume.

2. What is relative density?

Relative density, or specific gravity, is the ratio of the density (mass of a unit volume) of a substance to the density of a given reference material.

3. What is the SI unit of density?

Density can also be expressed as kilograms per cubic metre (in MKS or SI units)

Answer 2

The density, of a substance is its mass per unit volume. The symbol most often used for density is ρ, although the Latin letter D can also be used. Mathematically, density is defined as mass divided by volume: ${\displaystyle \rho ={\frac {m}{V}}}$ where ρ is the density, m is the mass, and V is the volume.

Relative density, or specific gravity, is the ratio of the density 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; for gases, the reference is air at room temperature.

The SI unit for density is: kilogram per cubic metre (kg/m³).

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