Chapter 18, Problem 1PLA

To determine

The definition of density and its unit.

Answer to Problem 1PLA

Density is the mass per unit volume and its unit is $\text{kg}/{\text{m}}^{\text{3}}$.

Explanation of Solution

Density of an object is the amount of matter present in the volume of the object. Density is defined as the mass per unit volume of the object.

Write the formula for density

    $\rho =\frac{m}{V}$

Here, $\rho$ is the density, $m$ is the mass and $V$ is the volume.

The SI unit of density is $\text{kg}/{\text{m}}^{\text{3}}$ and the cgs system unit is $\text{g}/{\text{cm}}^{\text{3}}$.

Conclusion:

Therefore, density is the mass per unit volume and its unit is $\text{kg}/{\text{m}}^{\text{3}}$.