A student states that gas pressure acts downwards because gas particles have weight. A sealed container is turned upside down at constant temperature. Which observation and explanation show why the student's statement is incorrect?
Pressure acts on every wall because particles move only towards the floor.
Pressure acts on every wall because particles move in random directions.
Pressure acts on the lowest wall because particles move in random directions.
Pressure acts on the lowest wall because particles move only towards the floor.
108 exam-style questions on Edexcel GCSE Physics 14.3 Gas pressure and temperature, covering 14.3.1 Gas pressure and particle motion, 14.3.2 Temperature and pressure at constant volume, 14.3.3 Absolute zero and the kelvin scale, 14.3.4 Compressing and expanding gases, 14.3.5 Volume and pressure at constant temperature, and 14.3.6 Doing work on a gas. Each one has a worked solution and a mark scheme showing where the marks go.