Answer to Question #310553 in Electricity and Magnetism for Diablo

Question

A source of sound moves towards a stationary observer with a speed of ⅓ that of sound. If the frequency of the sound from the source is 100Hz, what is the apparent frequency of the sound heard by the observer

Answer 1

$\nu'=\nu\frac{v_1+v_2}{v_1-v_2}=2\nu=200~Hz.$