(a(i))[3]
Calculate the distance XP from the explosion at X to the observer at P.
(a(ii))[2]
Suggest how the quieter sound waves reach the observer.
(b)[3]
Calculate the frequency of the sound.
Physics 0625 · IGCSE · Sound
Sound — practice question
An observer is positioned at P and looks down into a rock quarry. A small explosion occurs at X in the quarry. Fig. 5.1 illustrates the arrangement.