A cyclist uses a pump to inflate a tyre. The air in the pump gets hotter as the handle is pushed in quickly.
Which statement explains this?
Work is done on the air, so the energy in its thermal store increases
The air is squashed, so each air particle gets bigger and hotter
Energy is transferred to the air from the cooler tyre as it is pushed in
The number of air particles increases, so the temperature rises
50 exam-style questions on OCR GCSE Physics 1.3 Pressure, covering 1.3.1 Molecular motion, temperature and gas pressure, 1.3.2 Gas pressure at constant volume, 1.3.3 Compressing and expanding gases, 1.3.4 Gas volume and pressure at constant temperature, 1.3.5 Doing work on a gas, 1.3.6 The Earth's atmosphere and atmospheric pressure, 1.3.7 Atmospheric pressure and height, 1.3.8 Floating and sinking, 1.3.9 Pressure in liquids and upthrust, and 1.3.10 Pressure differences with depth. Each one has a worked solution and a mark scheme showing where the marks go.