Density

The mass of a substance in a given volume; denser air has more mass in the same volume.

Mass per unit volume; denser air contains more mass, and usually more particles, in each cubic metre.

Mass per unit volume, usually measured in kilograms per cubic metre (kg/m³).

The mass per unit volume of a substance, measured in kilograms per cubic metre (kg/m³).

Mass per unit volume, measured in kilograms per cubic metre (kg/m³).

Mass per unit volume.

Mass per unit volume; air with fewer particles in the same volume has a lower density.

The mass per unit volume of a substance or object, calculated using $\rho = m/V$.

Mass per unit volume of a substance.

Mass per unit volume, measured in kilograms per cubic metre ($\text{kg/m}^3$).

Mass per unit volume of a substance or object, calculated by dividing its mass by its volume.

The amount of mass in each unit of volume of a substance or object.

Mass per unit volume of a substance or object.