Question

The frequency of sound waves decreases when an object is moving away from an observer. Which is a
good way to model this? (1 point)
Answers below:
Listen to the pitch change in the music on the headphones you are wearing as you start running down the
sidewalk.

Listen to the change in pitch of music playing inside a car as it passes and drives away from you.

Listen for the pitch change in a bike rider's music as you ride a bike next to another person on a bike going
the same speed.

Listen to the change in pitch from a whistling ball as someone drops it from a ledge down to you.

Answers

GPT-4o mini
The best way to model the decrease in the frequency of sound waves when an object is moving away from an observer is:

**Listen to the change in pitch of music playing inside a car as it passes and drives away from you.**

This scenario exemplifies the Doppler Effect, where the frequency of sound decreases (the pitch sounds lower) as the sound source (the car) moves away from the observer.