Question

a racecar is travelling around a track. under what circumstance would you hear the highest pitch? a as the car is moving slowly toward you. b as the car is moving quickly toward you. c as the car is moving slowly away from you. d as the car is moving quickly away from you.

Explanation:

This is based on the Doppler - effect in physics. When a source (the racecar) moves towards an observer, the frequency of the sound (pitch) increases. The faster the source moves towards the observer, the higher the increase in frequency and thus the higher the pitch.

Answer:

B. As the car is moving quickly toward you