Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
|
|
|
1.
|
Which of the
following is the time it takes to complete a cycle of motion? a. | amplitude | c. | frequency | b. | period | d. | revolution | | | | |
|
|
|
2.
|
Which of the
following is the number of cycles or vibrations per unit of time? a. | amplitude | c. | frequency | b. | period | d. | revolution | | | | |
|
|
|
3.
|
How are
frequency and period related? a. | They are directly related. | b. | They are inversely
related. | c. | They both measure the time per cycle. | d. | They both measure the
number of cycles per unit of time. | | |
|
|
|
4.
|
An amusement
park ride has a frequency of 0.05 Hz. What is the ride’s period?
|
|
|
5.
|
Which of the
following is a single nonperiodic disturbance? a. | pulse wave | c. | sine wave | b. | periodic wave | d. | transverse wave | | | | |
|
|
|
6.
|
Which of the
following is a wave whose source is some form of repeating motion? a. | pulse
wave | c. | sine
wave | b. | periodic
wave | d. | transverse
wave | | | | |
|
|
|
|
|
|
7.
|
In the
waveform of the longitudinal wave shown above, the compressed regions correspond to a. | the
wavelength. | c. | troughs. | b. | crests. | d. | the mass. | | | | |
|
|
|
8.
|
In the
waveform of the longitudinal wave shown above, the stretched regions correspond to a. | the
wavelength. | c. | troughs. | b. | crests. | d. | the mass. | | | | |
|
|
|
9.
|
A periodic
wave has a wavelength of 0.50 m and a speed of 20 m/s. What is the wave frequency? a. | 0.02
Hz | c. | 40
Hz | b. | 20
Hz | d. | 10
Hz | | | | |
|
|
|
10.
|
A musical
tone sounded on a piano has a frequency of 410 Hz and a wavelength of 0.80 m. What is the speed of
the sound wave? a. | 170
m/s | c. | 330
m/s | b. | 240
m/s | d. | 590
m/s | | | | |
|
|
|
11.
|
Two waves
can occupy the same space at the same time because waves a. | are
matter. | c. | do not cause
interference patterns. | b. | are displacements of matter. | d. | cannot pass through one another. | | | | |
|
|
|
12.
|
Standing
waves are produced by periodic waves of a. | any amplitude and wavelength traveling in the same
direction. | b. | the same amplitude and wavelength traveling in the same
direction. | c. | any amplitude and wavelength traveling in opposite
directions. | d. | the same frequency, amplitude, and wavelength traveling in opposite
directions. | | |
|
|
|
13.
|
Which of the
following wave lengths would produce standing waves on a string approximately 3.5 m
long? a. | 2.33
m | c. | 3.75
m | b. | 2.85
m | d. | 4.55
m | | | | |
|
|
|
|
|
|
14.
|
How many
nodes and antinodes are shown in the standing wave above? a. | two nodes and three
antinodes | c. | one-third node and one
antinode | b. | one node and two antinodes | d. | three nodes and two antinodes | | | | |
|
|
|
|
|
|
15.
|
How many
nodes and antinodes are shown in the standing wave above? a. | four nodes and four
antinodes | c. | four nodes and five
antinodes | b. | four nodes and three antinodes | d. | five nodes and four antinodes | | | | |
|
|
|
|
|
|
16.
|
In the
diagram above, use the superposition principle to find the resultant wave of waves X and
Y.
|
|
|
|
|
|
17.
|
In the
diagram above, use the superposition principle to find the resultant wave of waves Q and
R.
|
|
|
18.
|
Sound
waves a. | are a part of the
electromagnetic spectrum. | b. | do not require a medium for transmission. | c. | are longitudinal
waves. | d. | are transverse waves. | | |
|
|
|
19.
|
Which of the
following is the region of a longitudinal wave in which the density and pressure are greater than
normal? a. | rarefaction | c. | spherical
wave | b. | compression | d. | Doppler
effect | | | | |
|
|
|
20.
|
Which of the
following is the region of a longitudinal wave in which the density and pressure are less than
normal? a. | rarefaction | c. | spherical
wave | b. | compression | d. | Doppler
effect | | | | |
|
|
|
21.
|
Pitch refers
to a. | how many vibrations per
second are perceived by the human ear. | b. | how many cycles per second are in a transverse
wave. | c. | the constructive interference of electromagnetic
waves. | d. | the destructive interference in transverse
waves. | | |
|
|
|
22.
|
Which has a
higher speed of sound? a. | water | c. | methyl alcohol | b. | oxygen | d. | copper | | | | |
|
|
|
23.
|
Which
statement about sound waves is correct? a. | They generally travel faster through solids than through
gases. | b. | They generally travel faster through gases than through
solids. | c. | They generally travel faster through gases than
liquids. | d. | They generally travel faster than light. | | |
|
|
|
24.
|
As a sound
source approaches and then moves past a stationary observer, the observer will hear a. | a steady rise in
pitch. | c. | a rise in pitch, then a
drop in pitch. | b. | a sudden drop in pitch. | d. | a drop in pitch, then a rise in pitch. | | | | |
|
|
|
25.
|
If you hear
the pitch of a siren become lower, you know that a. | neither you nor the siren is moving. | b. | you are moving toward
the siren or the siren is moving toward you. | c. | you are moving away
from the siren or the siren is moving toward you. | d. | the source has just
passed you or it is accelerating away from you. | | |
|
|
|
26.
|
If you are
on a train, how will the pitch of the train’s whistle sound to you as the train
moves? a. | The pitch will become
steadily higher. | b. | The pitch will become steadily lower. | c. | The pitch will not
change. | d. | The pitch will become higher then become
lower. | | |
|
|
|
27.
|
Tripling the
distance from a sound source will change the intensity of the sound waves by what
factor?
|
|
|
28.
|
What is the
intensity of sound waves produced by a trumpet at a distance of 1.6 m when the power output of the
trumpet is 0.30 W? a. | 5.9 ´ 10–3 W/m2 | c. | 9.4 ´ 10–3 W/m2 | b. | 1.5 ´ 10–2
W/m2 | d. | 3.7 ´ 10–2
W/m2 | | | | |
|
|
|
29.
|
If the
intensity of a sound is increased by a factor of 100, the new decibel level will be a. | two units
greater. | c. | 10 times
greater. | b. | double the old one. | d. | 20 units greater. | | | | |
|
|
|
30.
|
Which of the
following is the condition that exists when the frequency of a force applied to a system matches the
natural frequency of vibration of the system? a. | pitch | c. | timbre | b. | decibel level | d. | resonance | | | | |
|
|
|
31.
|
A sound
twice the intensity of the faintest audible sound is not perceived as twice as loud because the
sensation of loudness is a. | approximately logarithmic in the human ear. | b. | approximately
exponential in the human ear. | c. | outside the threshold of hearing. | d. | outside the threshold
of pain. | | |
|
|
|
32.
|
If both ends
of a pipe are open, a. | all harmonics are present. | c. | only odd harmonics are present. | b. | no harmonics are
present. | d. | only even harmonics are
present. | | | | |
|
|
|
33.
|
If one end
of a pipe is closed, a. | all harmonics are present. | c. | only odd harmonics are present. | b. | no harmonics are
present. | d. | only even harmonics are
present. | | | | |
|
|
|
34.
|
What is the
lowest frequency that will resonate in a 2.0 m length organ pipe closed at one end? The speed of
sound in air at this temperature is 340 m/s. a. | 42 Hz | c. | 170 Hz | b. | 85 Hz | d. | 680 Hz | | | | |
|
|
|
35.
|
If a guitar
string has a fundamental frequency of 500 Hz, what is the frequency of its second
harmonic? a. | 250
Hz | c. | 1000
Hz | b. | 750
Hz | d. | 1500
Hz | | | | |
|
|
|
36.
|
The effects
of sound on the ear are loudness, pitch, and quality. Loudness is an effect of ____, pitch is an
effect of ____, and timbre is an effect of ____. a. | intensity; harmonic content; frequency | c. | frequency; intensity; harmonic content | b. | harmonic content;
frequency; intensity | d. | intensity; frequency;
harmonic content | | | | |
|
|
|
37.
|
What
phenomenon is created by two tuning forks side by side that emit frequencies that differ by only a
small amount? a. | resonance | c. | the Doppler
effect | b. | interference | d. | beats | | | | |
|
|
|
38.
|
Two
vibrating tuning forks held side by side will create a beat frequency of what value if the individual
frequencies of the two forks are 342 Hz and 345 Hz, respectively? a. | 687
Hz | c. | 339
Hz | b. | 343.5
Hz | d. | 3
Hz | | | | |
|
|
|
39.
|
Two notes
have a beat frequency of 4 Hz. The frequency of one note is 420 Hz. What is the frequency of the
other note? a. | 422 Hz or 418
Hz | c. | 424 Hz or 416
Hz | b. | 105
Hz | d. | 1680
Hz | | | | |
|
|
|
40.
|
Beats are
formed by the interference of two waves a. | of slightly different frequencies traveling in the same
direction. | b. | of slightly different frequencies traveling in different
directions. | c. | with equal frequencies traveling in the same
direction. | d. | with equal frequencies traveling in different
directions. | | |
|