IGCSE Physics Edexcel 4PH1

know and use the relationship between density, mass and volume:

$\text{density} = \dfrac{\text{mass}}{\text{volume}}$

$ρ = \dfrac{m}{V}$

practical: investigate density using direct measurements of mass and volume

know and use the relationship between pressure, force and area:

$\text{pressure} = \dfrac{\text{force}}{\text{area}}$

$p = \dfrac{F}{A}$

understand how the pressure at a point in a gas or liquid at rest acts equally in all directions

know and use the relationship for pressure difference:

pressure difference = height × density × gravitational field strength

$p = h × ρ × g$