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1. An opera singer has two precisely identical glasses. The singer produces as pure a tone as possible and shatters the first glass at a frequency of 808 Hz. She then sings a frequency of 838 Hz in the presence of the second glass. The second glass will likely:
2. A child is practicing the first overtone on his flute. If his brother covers one end of the flute for a brief second, how will the sound change, assuming that the new pitch represents the first overtone in the new setup?
3. Which of the following is necessarily true regarding frequency, angular frequency, and period of a given wave?
4. Ultrasound machines calculate distance based upon:
5. The period for a certain wave is 34 ms. If there is a Doppler shift that doubles the perceived frequency, which of the following must be true?
I. The detector is moving toward the source at a velocity equal to the speed of sound.
II. The source is moving toward the detector at a velocity equal to half the speed of sound.
III. The perceived period is 17 ms.
IV. The perceived period is 68 ms.
6. If the speed of a wave is and its wavelength is 10 cm, what is its period?
7. What is the angular frequency of the third harmonic in a pipe of length 0.6 m with one closed end? (Note: The speed of the sound is approximately )
8. A certain sound level is increased by 20 dB. By what factor does its intensity increase?
9. In some forms of otosclerosis, the stapedial foot plate, which transmits vibrations from the bones of the middle ear to the fluid within the cochlea, can become fixed in position. This limits the displacement of the stapedial foot plate during vibration. Based on this mechanism, which of the following symptoms would most likely be seen in an individual with otosclerosis?
10. If two waves are 180° out of phase, what is the amplitude of the resultant wave if the amplitudes of the original waves are 5 cm and 3 cm?
11. A student is measuring sound frequencies from the side of a road while walking east. For which of the following situations could the student determine that the difference between the perceived frequency and the actual emitted frequency is zero?
12. In which of the following media does sound travel the fastest?
13. Shock waves have the greatest impact when the source is traveling:
14. As an officer approaches a student who is studying with his radio playing loudly beside him, he experiences the Doppler effect. Which of the following statements remains true while the officer moves closer to the student?
I. The apparent frequency of the music is increased.
II. The same apparent frequency would be produced if the officer were stationary and the student approached him at the same speed.
III. The apparent velocity of the wave is decreased.
15. Ignoring attenuation, how does the intensity of a sound change as the distance from the source doubles?
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