A simple U-tube manometer containing water is used to measure the pressure of a gas supply relative to atmospheric pressure. Which measurement is used to determine this pressure difference?
The total volume of water in the manometer
The difference in height between the two water levels
The cross-sectional area of the tube
The temperature of the water
188 exam-style questions on CIE IGCSE Physics Pressure, covering Pressure. Each one has a worked solution and a mark scheme showing where the marks go.