The graph shows how a quantity Y varies with a quantity X for an object falling vertically at its terminal velocity towards the surface of the Earth. [Figure 8.1] Which quantities could X and Y represent?

A skydiver, who is falling vertically through the air, opens his parachute. Which row describes the velocity of the s…

A rock of mass 2m, travelling in deep space at velocity v, explodes into two parts of equal mass, one of which is the…

An object of fixed mass is initially at rest at point P. The object then moves away from point P with uniform acceler…

A distant star is receding from the Earth with a speed of 1.40 × 10⁷ m s⁻¹. It emits light of frequency 4.57 × 10¹⁴ H…

Diffraction is a term used to describe one aspect of wave behaviour. What does diffraction make possible?

Monochromatic light of wavelength 5.30 × 10⁻⁷ m is incident normally on a diffraction grating. The first order maximu…