A police car has a two-tone siren emitting sound of frequencies of 700 Hz and 1000 Hz. The police car is travelling at a speed of 40.0 m s⁻¹ towards a stationary observer. The speed of sound in the air is 340 m s⁻¹. What is the difference between the two frequencies of the sound that is heard by the observer?

A wave of frequency 15 Hz travels at 24 m s¯¹ through a medium. What is the phase difference between two points 2.0 m…

Which row describes a longitudinal wave and a medium through which it can travel?

An observer is situated at the top of a tall tower. An aeroplane emitting sound at a frequency of 1000 Hz approaches …

Outline the principles of computed tomography (CT) scanning.

The incomplete nuclear equation for one possible reaction that takes place in the core of a nuclear reactor is ⁹²²³⁵U…

The table shows some measurable quantities. Which row gives the correct order of magnitude of the measurable quantity…