Practice Problems
Assorted Resonance
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Question 1
What is the wave speed of a wave traveling through a long spring if its frequency is 13 Hz and its wavelength is 2.8 m.
4.64 m/sec
36.4 m/sec
15.8 m/sec
0.22 m/sec
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Question 2
Given that the spring in
Question 1
does not change, what would be the wave's new wavelength if the frequency of oscillation were to be doubled?
2.80 meters
5.60 meters
18.2 meters
1.40 meters
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Question 3
A string vibrates at 442 Hz with a wavelength of 2.8 meters. If the wavelength is shortened by 0.7 meters, what is its new frequency?
332 Hz
589 Hz
631 Hz
1768 Hz
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Question 4
A fundamental fixed-fixed standing wave is generated along a 1.3-meter string when its frequency is 442 Hz. What would be the frequency of a 3rd harmonic wave generated along this same string?
1326 Hz
663 Hz
1149 Hz
147 Hz
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Question 5
The speed of sound inside a 0.74-meter long open-closed tube (fixed-free) is 347.8 m/sec.What are its first three resonate frequencies?
118 Hz, 353 Hz, 588 Hz
235 Hz, 705 Hz, 1175 Hz
235 Hz, 470 Hz, 705 Hz
118 Hz, 235 Hz, 353 Hz
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Question 6
If the tube in
Question 5
was now opened on both ends (free-free), what would be its new first three resonate frequencies?
118 Hz, 235 Hz, 353 Hz
235 Hz, 470 Hz, 705 Hz
235 Hz, 705 Hz, 1175 Hz
118 Hz, 353 Hz, 588 Hz
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Question 7
The lowest frequency that a conch shell is able to produce is 235 Hz, if the resonating dimension is 0.37 meters and the wave speed is 347.8 m/s, what type of standing wave is being created?
cannot be determined
fixed-free
free-free
fixed-fixed
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Question 8
What is the speed of sound in a chamber (fixed-free) that is 2.8 meters deep if sound is resonating at 442 Hz?
928 m/sec
1238 m/sec
309 m/sec
619 m/sec
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William A. Hilburn
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Application Programmer
Mark Acton