A tall water feature is open at the top and contains water. Two identical nozzles are fitted one above the other in a vertical side. When both nozzles are opened, water leaves the lower nozzle at a greater speed.
Which statement explains why the water leaves the lower nozzle at a greater speed?
There is less water below the lower nozzle, so less liquid opposes the water leaving the feature.
The base pushes upwards on the water near the lower nozzle, producing the pressure that forces water out.
The lower nozzle is below a taller column of water, whose greater weight produces a greater pressure.
Water particles beside the lower nozzle have fallen further, so they strike the nozzle with greater speed.
108 exam-style questions on AQA GCSE Physics 5.5 Pressure and pressure differences in fluids, covering 5.5.1 Pressure in a fluid and 5.5.2 Atmospheric pressure. Each one has a worked solution and a mark scheme showing where the marks go.