AnswersPhysics B Spring 2026 Mr EdgeSound Waves

Sound Waves Answers

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A source emits a sound and is represented by the red dot in this map. Four people are located around the source, and the circles represent the sound wave.

Question illustration
A
person A
B
person B
C
person C
D
person D
2
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The figure shows a sound wave as a function of time when the source is stationary with respect to the observer.

Question illustration
A
An illustration of a transverse wave and three crests and three troughs are labeled 1 s total.
Option A
B
An Illustration of a transverse wave that is taller than the previous. Three crests and three troughs are labeled 1 s total.
Option B
C
An Illustration of a transverse wave and four crests and four troughs are labeled 1 s total.
Option C
D
An Illustration of a transverse wave and seven crests and seven troughs are labeled 1 s total.
Option D
3

The diagrams show the sound waves produced in one second from various tuning forks.Which sound wave has the lowest pitch?

A
An illustration of a tuning fork with lines parallel to the fork moving out. The lines start out farther apart, get closer together and then farther apart again.
Option A
B
An illustration of a tuning fork with lines parallel to the fork moving out. The lines start out farther apart, get closer together and then farther apart again. The line pattern then repeats.
Option B
C
An illustration of a tuning fork with lines parallel to the fork moving out. The lines start out close together, get farther apart and then close together again. The line pattern then repeats.
Option C
D
An illustration of a tuning fork with lines parallel to the fork moving out. The lines start out close together, get farther apart and then close together again. The line pattern then repeats. The farther apart section gets wider the further the lines are from the fork.
Option D
4

Which voice can produce a pitch that has a speed of 343 m/s and a wavelength of 0.68 m? Check all that apply.

A
bass
B
baritone
C
tenor
D
contralto
E
soprano
5

A student hears a police siren. What would change the frequency that the student hears? Check all that apply.if the student walked toward the police carif the student walked away from the police carif the police car moved toward the studentif the police car moved away from the studentif the intensity of the siren increasedif the intensity of the siren decreased

A
if the student walked toward the police car
B
if the student walked away from the police car
C
if the police car moved toward the student
D
if the police car moved away from the student
E
if the intensity of the siren increased
F
if the intensity of the siren decreased
6

Which best explains why sound travels fastest through a solid?

A
Sound is a mechanical wave, so closer molecules in the medium cause energy to transfer faster.
B
Sound is a mechanical wave, so if the volume of the medium is greater, more energy is transferred.
C
Sound is an electromagnetic wave, so the medium does not affect the speed.
D
Sound is an electromagnetic wave, so a greater amplitude results in a greater speed.
7

Which best describes the energy of a sound wave as it travels through a medium?

A
It increases.
B
It decreases.
C
It remains the same.
D
It depends on the medium.
9

An ambulance emits a frequency of 450 Hz from its siren. What frequency is heard by a man as the ambulance moves toward him?

A
less than 450 Hz
B
more than 450 Hz
C
450 Hz
D
0 Hz
10

What best describes a sound wave?

A
transverse and electromagnetic
B
longitudinal and mechanical
C
longitudinal and electromagnetic
D
transverse and mechanical

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