A sealed syringe contains air at constant temperature. The plunger is pulled out and then held still. Which explains the lower pressure after expansion?
Mean particle speed is lower; collisions with each unit area of wall are less frequent.
Mean particle speed is unchanged; collisions with each unit area of wall are more frequent.
Mean particle speed is unchanged; collisions with each unit area of wall are less frequent.
Mean particle speed is higher; collisions with each unit area of wall are more frequent.
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.