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Sound Review
What type of wave is a sound wave?
Mech
anical a
nd...
Mech
anical a
nd...
Electr
omagneti...
Electr
omagneti...
20%
0%5%
75%1. Mechanical and Transverse
2. Mechanical and Longitudinal
3. Electromagnetic and Transverse
4. Electromagnetic and Longitudinal
The main factor that determines the speed of a sound wave is…
The amplitude
The frequency
The inte
nsity
The properti
es...
The wave
length
0%
67%
11%
22%
0%
1. The amplitude2. The frequency3. The intensity4. The properties of
the medium5. The wavelength
Which of the following factors determines the pitch of a sound?
Amplitude
Inte
nsity
Frequency
Phase
Speed
10%15%
0%0%
75%1. Amplitude2. Intensity3. Frequency4. Phase5. Speed
The standing wave pattern shown below represents which harmonic?
First
Seco
nd
Third
Fourth
Fifth
0% 0%
16%
84%
0%
1. First2. Second 3. Third 4. Fourth5. Fifth
What two characteristics determine if a sound can be heard?
Frequency
and ...
Frequency
and ...
Inte
nsity a
nd ...
Inte
nsity a
nd ...
Amplitude and ...
5%
79%
0%
11%5%
1. Frequency and wavelength
2. Frequency and Intensity
3. Intensity and Power4. Intensity and
Amplitude5. Amplitude and
wavelength
Participant Scores500 Rusk500 21. Yonkers500 Stafford400 O'Callaghan400 Lambert400 Ward400 Opet400 French400 20. Will300 Houlahan
The Doppler Effect describes…
The ability o
f...
One vi
brating ...
The form
ation ...
Perceive
d freq...
The difference
...
0%5%
0%
89%
5%
1. The ability of a single pipe to play multiple notes
2. One vibrating object forcing another to vibrate
3. The formation of beat patterns
4. Perceived frequency changes due to relative motion
5. The differences between notes on a flute and a trumpet
While driving, you hear a police car siren approaching from behind. If the siren produces
a 1500 Hz sound, you will hear a sound…
Gre
ater t
han 1...
Less
than 1500...
Equal
to 1500 ...
You will
not b...
63%
0%
11%
26%
1. Greater than 1500 Hz2. Less than 1500 Hz3. Equal to 1500 Hz4. You will not be able
to hear this sound
Front row at a rock concert may reach upwards of 120 dB. How many times more intense is this
than typical conversation at 60 dB?
1,000,000x 2x 60x
10x 600x
81%
0% 0%0%
19%
1. 1,000,000x2. 2x3. 60x4. 10x5. 600x
Four machines operating simultaneously produce a 80 dB sound. How many of these machines would
it take to produce a 100 dB sound?
40 16 80400 5
10%5%
15%
60%
10%
1. 402. 163. 804. 4005. 5
The human voice has been shown to be capable of shattering a glass. This is possible due to…
Resonance
Doppler E
ffect
Inte
rfere
nce
Harm
onics
Timbre
90%
0% 0%
10%
0%
1. Resonance2. Doppler Effect3. Interference4. Harmonics5. Timbre
Participant Scores1000 Rusk1000 21. Yonkers1000 Stafford900 Lambert900 Ward900 Opet800 O'Callaghan800 French700 Fejko700 Berger
You are traveling in a car near by a moving train. The train sounds its whistle, but you fail to hear
the Doppler effect. This may be because…
You are travel...
You are travel...
You are travel...
You are travel...
You are travel...
0%
11%
0%5%
84%1. You are traveling away from the train too fast to detect it
2. You are traveling towards the train too fast to detect it
3. You are traveling at the same speed as the train
4. You are traveling away from the train too slowly to detect it
5. You are traveling towards the train to slowly to detect it
At room temperature, sound will travel most slowly through which of the following?
Iron
Wate
r
Aluminum
Mercu
ry
Heliu
m
15%
5%
65%
10%5%
1. Iron2. Water3. Aluminum4. Mercury5. Helium
Two pipes are exactly the same length, but one is open and the other is closed at one end. Which pipe’s fundamental frequency
will be the higher pitch?44%
39%
17%
1. Open pipe2. Closed pipe3. Both fundamentals
will be the same
An observer is sitting in a train. The train blows its whistle as it accelerates from rest along the
track moving faster and faster. The frequency of sound detected by the observer compared to
the original whistle will be…
The same
High
er
Lower
Zero
79%
0%
16%
5%
1. The same2. Higher3. Lower4. Zero
If the distance from a source of sound is doubled, the intensity of the sound will change by a factor of…
2 4 ½ ¼
No ch
ange
5%10% 10%
60%
15%
1. 22. 43. ½4. ¼5. No change
Participant Scores1500 Stafford1400 Rusk1400 21. Yonkers1300 Opet1200 O'Callaghan1200 Ward1200 French1100 Lambert1100 Fejko1100 Berger
A string on a guitar produces a 440 Hz note when plucked. What would be the 4th harmonic of this string?
440 Hz
110 Hz
880 Hz
1760 Hz
There is
no 4t...
5%0% 0%
90%
5%
1. 440 Hz2. 110 Hz3. 880 Hz4. 1760 Hz5. There is no 4th
harmonic for a string
A flute of length 60.0 cm behaves as an open pipe. What is the 2nd harmonic of
this flute? (assume v = 343 m/s)
285 Hz
570 Hz
143 Hz
120 Hz
240 Hz
32%
58%
0%0%
11%
1. 285 Hz2. 570 Hz3. 143 Hz4. 120 Hz5. 240 Hz
If the pipe represented below has a length of 3.0 m, what is the wavelength of the
harmonic shown?
1.0 m 2.0 m
3.0 m 1.5 m
0.67 m
11%
58%
0%
32%
0%
1. 1.0 m2. 2.0 m3. 3.0 m4. 1.5 m5. 0.67 m
A 100 W speaker is operating at full power. What is the intensity of sound 3.0 m away?
0.88 W/m
2
707 W/m
2
72 W/m
2
2.7 W/m
2
0 W/m
2
74%
16%
0%5%5%
1. 0.88 W/m2
2. 707 W/m2
3. 72 W/m2
4. 2.7 W/m2
5. 0 W/m2
A piano tuner uses a 320 Hz tuning fork to tune a string. If she hears 3 beats per second and a
lower pitch than expected, the string is vibrating at…
320 Hz
323 Hz
317 Hz
960 Hz
107 Hz
0% 0%5%
11%
84%
1. 320 Hz2. 323 Hz3. 317 Hz4. 960 Hz5. 107 Hz
Participant Scores1900 Rusk1900 21. Yonkers1800 Opet1800 Stafford1700 O'Callaghan1700 French1600 Ward1600 Berger1500 Fejko1400 Lambert
500 Point Final Question!!!How many times more intense is a 65 dB sound compared to a 60
dB sound?
5.0 x 3.2 x
1.1 x 105 x
10-5 x
15%
25%
15%15%
30%
1. 5.0 x2. 3.2 x3. 1.1 x4. 105 x5. 10-5 x
*You will not be asked to do this on the test!!!
Participant Scores2400 Rusk2300 Stafford2200 French2000 Fejko1900 21. Yonkers1900 Lambert1800 Opet1700 O'Callaghan1600 Ward1600 Berger
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