A fixed mass of gas in a sealed cylinder is allowed to expand so that its volume increases at a constant temperature.
How do the gas particles now collide with the walls of the cylinder?
less often with the same average speed
less often with a smaller average speed
more often with the same average speed
more often with a greater average speed
126 exam-style questions on CIE IGCSE Physics 2.1.3a The absolute scale of temperature. Each one has a worked solution and a mark scheme showing where the marks go.