Question

question 1. what is density? list units that are commonly used to express density.

Explanation:

Density is defined as mass per unit volume. The formula is \(
ho=\frac{m}{V} \), where \(
ho \) is density, \( m \) is mass, and \( V \) is volume.

Common units for density:

• In the metric system, \( g/cm^{3} \) (grams per cubic centimeter) is often used for solids and liquids. For example, the density of water is approximately \( 1\ g/cm^{3} \).
• \( kg/m^{3} \) (kilograms per cubic meter) is the SI unit. It is useful for measuring the density of gases (e.g., air has a density of about \( 1.29\ kg/m^{3} \) at standard conditions) and for large - scale or industrial applications.

Answer:

Density is mass per unit volume (\(
ho = \frac{m}{V} \)). Common units: \( g/cm^{3} \), \( kg/m^{3} \).