Solids, Liquids & Gases

The behaviour of matter depends on how its particles are arranged and move.

Density

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

Worked example. A $0.5$ kg block of volume $2 \times 10^{-4}$ m³ has density $\rho = \dfrac{0.5}{2\times10^{-4}} = 2500$ kg m⁻³.