0625/42 · Oct/Nov 2025

Scalars and vectors, and the velocity and momentum of a thrown ball.

Resultant force from acceleration, resistive forces, and the force for circular motion.

Solar panels and efficiency, a.c. and d.c., batteries and charge.

Gas pressure and volume at constant temperature, force on a piston and work done.

Evaporation, what speeds it up, and wet roads and braking.

Waves at a boundary, total internal reflection and optical fibres.

Lamps in parallel: current, energy in kWh and combined resistance.

Magnetic fields, and induction by moving a magnet in a coil.

Alpha, beta and gamma in a magnetic field, half-life and thickness monitoring.

Formation of the Solar System, Earth–Moon distance and the Hubble constant.