1. A person driving to the right and honks their horn. An observer standing behind the car, opposite its direction of motion would hear...(choose one)

a. Higher Pitch
b. Lower Pitch
c. Same pitch as the driver

please explain how you got to the answer

Look up Doppler. This question is pretty elementary in that subject.

To determine the answer to this question, we need to understand the concept of the Doppler effect. The Doppler effect describes the change in frequency or pitch of a sound wave when there is relative motion between the source of the sound and the observer.

In this scenario, we have a person driving to the right (let's call them the driver) and an observer standing behind the car, opposite its direction of motion. When the driver honks the car horn, sound waves are created and spread out in all directions.

Since the driver is moving to the right, the sound waves in front of the car are compressed, resulting in a higher frequency or pitch. This is known as a higher-pitched sound. Conversely, the sound waves behind the car are stretched out, resulting in a lower frequency or pitch.

As the observer is standing behind the car, opposite its direction of motion, the sound waves reaching the observer are stretched out due to the motion of the car. Therefore, the observer would hear a lower-pitched sound compared to what the driver hears.

So, the answer to the question is b. Lower Pitch.