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Guides 25–27 of 27
Physics
BeginnerWhen a school announcement reaches the back of a room, air from the loudspeaker has not travelled all the way into every listener’s ear.
Learning outcome: Distinguish particle motion from wave motion, calculate wavelength and echo distance, and explain the main stages of hearing using a labelled paper model.
Read the guide →Earth, weather & environment
IntermediateOne cool afternoon does not settle a climate question, and a smooth graph does not remove uncertainty.
Learning outcome: Calculate temperature anomalies and changes between period means, identify measurement artefacts and distinguish an observed trend from a forecast or causal explanation.
Read the guide →Physics
IntermediateLifting the same box slowly or quickly changes the required average power, while the ideal energy transfer can stay the same.
Learning outcome: Calculate signed work, kinetic and gravitational potential energy, distinguish energy from power, and test whether a mechanical-energy shortcut is justified.
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