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- 1. Multiple Choice
Sound in air can be best described as a
transverse pressure wave in air
longitudinal wave of compressions and rarefactions in air
polarized transverse wave in air
transgressive displacement wave in air
- 2. Multiple Choice
The speed of sound in air is approximately
140 m/s
340 m/s
1000 m/s
300,000,000 m/s
- 3. Multiple Choice
We set up a loudspeaker at the front of the classroom. The sound produced by the speaker will cause the air moleciles to
vibrate horizontally backward and forward
vibrate vertically up and down
fly across the room at the speed of sound
vibrate horizontally and vertically
- 4. Multiple Choice
The "pitch" of a musical noteis normally given in terms of its
speed
wavelength
frequency
amplitude
- 5. Multiple Choice
the loudness of a note is related to its
period
frequency
speed
amplitude
- 6. Multiple Choice
The normal frequency of hearing in a young person, who has not been to to many Metallica concerts, is about
10 Hz to 10 kHz
20 Hz to 20 kHz
50 Hz to 50 kHz
100 Hz to 100 kHz
- 7. Multiple Choice
The sound of a flute is different to the sound of a clarinet playing the same note, at the same loudness, because
they produce different fundamental frequencies
they produce different harmonics
they produce different amplitudes
one produces transverse waves and the other produces longitudinal waves
- 8. Multiple Choice
A sound wave of 5000 Hz is traveling through water, where it's speed is 1500 m/s. What is the wavelength of the sound?
0.15 m
0.3 m
1.5 m
3.0 m
- 9. Multiple Choice
Ultrasound travelling through steel has a wavelength of 0.2 m and a frequency of 24,500 Hz. What is the speed of sound in steel?
49 m/s
490 m/s
4,900 m/s
49,000 m/s
- 10. Multiple Choice
A man is yodeling in the Rockies (this does not happen every day). The echo of the yodel arrives back at the man, 15 s after the original yodel. How far is the man from the mountain, if the speed of sound on this day is 320 m/s
1200 m
2400 m
3600 m
4800 m
- 11. Multiple Choice
Two sounds of the same amplitude but different frequencies are played on a banjo. One has a frquency of 340 Hz and the other a frequency of 420 Hz. What is the beat frequency?
760 Hz
100 Hz
80 Hz
10 Hz
- 12. Multiple Choice
A piano tuner is trying to get two stringsin tune. One string vibrates at 440 Hz. The beat frequency is 3 Hz. Which of the following is a possible frquency for the other string?
397 Hz
407 Hz
437 Hz
447 Hz
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