Question

The density of a substance is its mass per unit volume. 

Answer 1

Answers:

a) $kg/m^{3}$

b) derived

Explanation:

Density $D$ is a characteristic property of substances and materials and is defined as the relationship between the mass $m$ and volume $V$ of a specific substance or material, as shown below:

$D=\frac{m}{V}$

This means density is inversely proportional to volume.

In addition, density is a derived unit, because is based on two basic units of the International Sistem of Units: Mass (kilograms) and Volume (cubic meters)