Class practical: As with a spring, force is required to compress or to expand a gas.
Demonstration: This experiment is quite elaborate, but it yields quantitative results. A beam balance weighs the pressure.
This episode looks at Brownian motion as evidence for the particulate nature of matter, and the macroscopic gas laws.
Our first collection of videos gives teachers and coaches of physics a preview of the training we offer ahead of this term's live support sessions.