A student uses a vertical glass tube to measure the pressure of a gas supply connected to a liquid manometer. The height difference of the liquid columns is hhh.
The measurement is repeated using a manometer tube with a larger cross-sectional area.
Explain why the height difference h h\,h does not change.
54 exam-style questions on Edexcel GCSE Physics 15.2 Pressure in fluids (physics only). Each one has a worked solution and a mark scheme showing where the marks go.