A miniature loudspeaker, initially at rest, falls vertically from a window in a high building. When the speaker has fallen a distance of 10.0m, it emits a very short pulse of sound of constant frequency 256 Hz in all directions. The pulse of sound, travelling at a speed of 330 ms¯¹, is heard by a person leaning out of the window. Air resistance is negligible. What is the frequency of the pulse of sound heard by the person?

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…