juan is standing on the street. an ambulance moves toward him and then passes by. what best describes the…

juan is standing on the street. an ambulance moves toward him and then passes by. what best describes the pitch that juan hears? the pitch remains constant as the ambulance moves toward and then away from juan. the pitch increases and decreases in a repeated pattern as the ambulance passes juan. the pitch drops to a lower pitch once the ambulance passes by juan. the pitch increases to a higher pitch once the ambulance passes by juan.

juan is standing on the street. an ambulance moves toward him and then passes by. what best describes the pitch that juan hears? the pitch remains constant as the ambulance moves toward and then away from juan. the pitch increases and decreases in a repeated pattern as the ambulance passes juan. the pitch drops to a lower pitch once the ambulance passes by juan. the pitch increases to a higher pitch once the ambulance passes by juan.

Answer

Brief Explanation:

This is based on the Doppler - effect in physics. When the ambulance moves towards Juan, the sound waves are compressed, increasing the frequency (pitch). When it passes by and moves away, the sound waves are stretched, decreasing the frequency (pitch).

Answer:

The pitch drops to a lower pitch once the ambulance passes by Juan.