20 clicker questions
TRANSCRIPT
![Page 1: 20 clicker questions](https://reader035.vdocument.in/reader035/viewer/2022070516/58720b891a28ab176b8b77ef/html5/thumbnails/1.jpg)
Chapter 20
Sound
![Page 2: 20 clicker questions](https://reader035.vdocument.in/reader035/viewer/2022070516/58720b891a28ab176b8b77ef/html5/thumbnails/2.jpg)
The sound waves that most humans cannot hear are
a. infrasonic.b. ultrasonic.c. Both of these.d. None of the above, for young people can hear
both.
![Page 3: 20 clicker questions](https://reader035.vdocument.in/reader035/viewer/2022070516/58720b891a28ab176b8b77ef/html5/thumbnails/3.jpg)
The sound waves that most humans cannot hear are
a. infrasonic.b. ultrasonic.c. Both of these.d. None of the above, for young people can hear
both.
![Page 4: 20 clicker questions](https://reader035.vdocument.in/reader035/viewer/2022070516/58720b891a28ab176b8b77ef/html5/thumbnails/4.jpg)
Sound travels in air by a series of
a. compressions.b. rarefactions.c. Both of these.d. None of these.
![Page 5: 20 clicker questions](https://reader035.vdocument.in/reader035/viewer/2022070516/58720b891a28ab176b8b77ef/html5/thumbnails/5.jpg)
Sound travels in air by a series of
a. compressions.b. rarefactions.c. Both of these.d. None of these.
![Page 6: 20 clicker questions](https://reader035.vdocument.in/reader035/viewer/2022070516/58720b891a28ab176b8b77ef/html5/thumbnails/6.jpg)
The vibrations set up in a radio loudspeaker have the same frequencies
as the vibrations
a. in the electric signal feeding the loudspeaker.b. that produce the sound you hear.c. Both of these.d. None of these.
![Page 7: 20 clicker questions](https://reader035.vdocument.in/reader035/viewer/2022070516/58720b891a28ab176b8b77ef/html5/thumbnails/7.jpg)
The vibrations set up in a radio loudspeaker have the same frequencies
as the vibrations
a. in the electric signal feeding the loudspeaker.b. that produce the sound you hear.c. Both of these.d. None of these.
![Page 8: 20 clicker questions](https://reader035.vdocument.in/reader035/viewer/2022070516/58720b891a28ab176b8b77ef/html5/thumbnails/8.jpg)
Sound travels in
a. solids.b. liquids.c. gases.d. All of these.
![Page 9: 20 clicker questions](https://reader035.vdocument.in/reader035/viewer/2022070516/58720b891a28ab176b8b77ef/html5/thumbnails/9.jpg)
Sound travels in
a. solids.b. liquids.c. gases.d. All of these.
![Page 10: 20 clicker questions](https://reader035.vdocument.in/reader035/viewer/2022070516/58720b891a28ab176b8b77ef/html5/thumbnails/10.jpg)
In which of these materials does sound travel fastest?
a. Airb. Waterc. Steeld. All the same at the same temperature
![Page 11: 20 clicker questions](https://reader035.vdocument.in/reader035/viewer/2022070516/58720b891a28ab176b8b77ef/html5/thumbnails/11.jpg)
In which of these materials does sound travel fastest?
a. Airb. Waterc. Steeld. All the same at the same temperature
![Page 12: 20 clicker questions](https://reader035.vdocument.in/reader035/viewer/2022070516/58720b891a28ab176b8b77ef/html5/thumbnails/12.jpg)
The speed of sound varies with
a. amplitude.b. frequency.c. temperature.d. All of these.
![Page 13: 20 clicker questions](https://reader035.vdocument.in/reader035/viewer/2022070516/58720b891a28ab176b8b77ef/html5/thumbnails/13.jpg)
The speed of sound varies with
a. amplitude.b. frequency.c. temperature.d. All of these.
Explanation: Although loudness varies with amplitude, and pitch varies with frequency, speed is not influenced by amplitude nor frequency. A listener in the back row at a concert would find music confusing if sound of different frequencies reached the ear at different times.
![Page 14: 20 clicker questions](https://reader035.vdocument.in/reader035/viewer/2022070516/58720b891a28ab176b8b77ef/html5/thumbnails/14.jpg)
The loudness of a sound is most closely related to its
a. frequency.b. period.c. wavelength.d. amplitude.
![Page 15: 20 clicker questions](https://reader035.vdocument.in/reader035/viewer/2022070516/58720b891a28ab176b8b77ef/html5/thumbnails/15.jpg)
The loudness of a sound is most closely related to its
a. frequency.b. period.c. wavelength.d. amplitude.
![Page 16: 20 clicker questions](https://reader035.vdocument.in/reader035/viewer/2022070516/58720b891a28ab176b8b77ef/html5/thumbnails/16.jpg)
Sound made to undergo reverberation is sound that is
a. sympathetically vibrating.b. varying in tone.c. multiply reflected.d. refracted.
![Page 17: 20 clicker questions](https://reader035.vdocument.in/reader035/viewer/2022070516/58720b891a28ab176b8b77ef/html5/thumbnails/17.jpg)
Sound made to undergo reverberation is sound that is
a. sympathetically vibrating.b. varying in tone.c. multiply reflected.d. refracted.
![Page 18: 20 clicker questions](https://reader035.vdocument.in/reader035/viewer/2022070516/58720b891a28ab176b8b77ef/html5/thumbnails/18.jpg)
When sound undergoes refraction, it undergoes a change in
a. frequency.b. wavelength.c. speed.d. intensity.
![Page 19: 20 clicker questions](https://reader035.vdocument.in/reader035/viewer/2022070516/58720b891a28ab176b8b77ef/html5/thumbnails/19.jpg)
When sound undergoes refraction, it undergoes a change in
a. frequency.b. wavelength.c. speed.d. intensity.
![Page 20: 20 clicker questions](https://reader035.vdocument.in/reader035/viewer/2022070516/58720b891a28ab176b8b77ef/html5/thumbnails/20.jpg)
Sound can NOT be
a. reflected.b. absorbed.c. diminished by interference.d. None of these.
![Page 21: 20 clicker questions](https://reader035.vdocument.in/reader035/viewer/2022070516/58720b891a28ab176b8b77ef/html5/thumbnails/21.jpg)
Sound can NOT be
a. reflected.b. absorbed.c. diminished by interference.d. None of these.
Comment: Sound, like any wave, can undergo all of these!
![Page 22: 20 clicker questions](https://reader035.vdocument.in/reader035/viewer/2022070516/58720b891a28ab176b8b77ef/html5/thumbnails/22.jpg)
Sensing an invisible object by way of ultrasound is used by
a. bats.b. dolphinsc. medical doctors.d. All of these.
![Page 23: 20 clicker questions](https://reader035.vdocument.in/reader035/viewer/2022070516/58720b891a28ab176b8b77ef/html5/thumbnails/23.jpg)
Sensing an invisible object by way of ultrasound is used by
a. bats.b. dolphinsc. medical doctors.d. All of these.
![Page 24: 20 clicker questions](https://reader035.vdocument.in/reader035/viewer/2022070516/58720b891a28ab176b8b77ef/html5/thumbnails/24.jpg)
Sound normally travels farther in air when the sound is
a. low frequency.b. high frequency.c. resonant.d. low in energy.
![Page 25: 20 clicker questions](https://reader035.vdocument.in/reader035/viewer/2022070516/58720b891a28ab176b8b77ef/html5/thumbnails/25.jpg)
Sound normally travels farther in air when the sound is
a. low frequency.b. high frequency.c. resonant.d. low in energy.
Explanation: Hence the low tone of fog horns.
![Page 26: 20 clicker questions](https://reader035.vdocument.in/reader035/viewer/2022070516/58720b891a28ab176b8b77ef/html5/thumbnails/26.jpg)
A factory floor vibrates, and as a result you vibrate when standing on the floor.
This is
a. forced vibration.b. resonance.c. refraction.d. diffraction.
![Page 27: 20 clicker questions](https://reader035.vdocument.in/reader035/viewer/2022070516/58720b891a28ab176b8b77ef/html5/thumbnails/27.jpg)
A factory floor vibrates, and as a result you vibrate when standing on the floor.
This is
a. forced vibration.b. resonance.c. refraction.d. diffraction.
![Page 28: 20 clicker questions](https://reader035.vdocument.in/reader035/viewer/2022070516/58720b891a28ab176b8b77ef/html5/thumbnails/28.jpg)
When you tap various objects, they produce characteristic sounds that are
related to
a. wavelength.b. amplitude.c. period.d. natural frequency.
![Page 29: 20 clicker questions](https://reader035.vdocument.in/reader035/viewer/2022070516/58720b891a28ab176b8b77ef/html5/thumbnails/29.jpg)
When you tap various objects, they produce characteristic sounds that are
related to
a. wavelength.b. amplitude.c. period.d. natural frequency.
![Page 30: 20 clicker questions](https://reader035.vdocument.in/reader035/viewer/2022070516/58720b891a28ab176b8b77ef/html5/thumbnails/30.jpg)
When the surface of a guitar is made to vibrate, we say it undergoes
a. forced vibration.b. resonance.c. refraction.d. amplitude enhancement.
![Page 31: 20 clicker questions](https://reader035.vdocument.in/reader035/viewer/2022070516/58720b891a28ab176b8b77ef/html5/thumbnails/31.jpg)
When the surface of a guitar is made to vibrate, we say it undergoes
a. forced vibration.b. resonance.c. refraction.d. amplitude enhancement.
Comment: The sound may be enhanced, but it is the surface of the guitar that undergoes forced vibration.
![Page 32: 20 clicker questions](https://reader035.vdocument.in/reader035/viewer/2022070516/58720b891a28ab176b8b77ef/html5/thumbnails/32.jpg)
When an object is set vibrating by a wave having a frequency that matches
the natural frequency of the object, what occurs is
a. forced vibration.b. resonance.c. refraction.d. amplitude enhancement.
![Page 33: 20 clicker questions](https://reader035.vdocument.in/reader035/viewer/2022070516/58720b891a28ab176b8b77ef/html5/thumbnails/33.jpg)
When an object is set vibrating by a wave having a frequency that matches
the natural frequency of the object, what occurs is
a. forced vibration.b. resonance.c. refraction.d. amplitude enhancement.
Comment: Resonance, rather than amplitude enhancement, is the better answer.
![Page 34: 20 clicker questions](https://reader035.vdocument.in/reader035/viewer/2022070516/58720b891a28ab176b8b77ef/html5/thumbnails/34.jpg)
Noise-canceling devices such as jackhammer earphones make use of
sound
a. destruction.b. interference.c. resonance.d. amplification.
![Page 35: 20 clicker questions](https://reader035.vdocument.in/reader035/viewer/2022070516/58720b891a28ab176b8b77ef/html5/thumbnails/35.jpg)
Noise-canceling devices such as jackhammer earphones make use of
sound
a. destruction.b. interference.c. resonance.d. amplification.
![Page 36: 20 clicker questions](https://reader035.vdocument.in/reader035/viewer/2022070516/58720b891a28ab176b8b77ef/html5/thumbnails/36.jpg)
The phenomenon of beats is the result of sound
a. destruction.b. interference.c. resonance.d. amplification.
![Page 37: 20 clicker questions](https://reader035.vdocument.in/reader035/viewer/2022070516/58720b891a28ab176b8b77ef/html5/thumbnails/37.jpg)
The phenomenon of beats is the result of sound
a. destruction.b. interference.c. resonance.d. amplification.
![Page 38: 20 clicker questions](https://reader035.vdocument.in/reader035/viewer/2022070516/58720b891a28ab176b8b77ef/html5/thumbnails/38.jpg)
When a 134-Hz tuning fork and a 144-Hz tuning fork are struck, the
beat frequency is
a. 2 Hz.b. 6 Hz.c. 8 Hz.d. more than 8 Hz.
![Page 39: 20 clicker questions](https://reader035.vdocument.in/reader035/viewer/2022070516/58720b891a28ab176b8b77ef/html5/thumbnails/39.jpg)
When a 134-Hz tuning fork and a 144-Hz tuning fork are struck, the
beat frequency is
a. 2 Hz.b. 6 Hz.c. 8 Hz.d. more than 8 Hz.
Explanation: The beat frequency is the difference between the two, 10 Hz (which is more than 8 Hz).
![Page 40: 20 clicker questions](https://reader035.vdocument.in/reader035/viewer/2022070516/58720b891a28ab176b8b77ef/html5/thumbnails/40.jpg)
When your radio set is tuned to an incoming radio signal, what occurs?
a. Forced vibrationb. Resonancec. Refractiond. Diffraction
![Page 41: 20 clicker questions](https://reader035.vdocument.in/reader035/viewer/2022070516/58720b891a28ab176b8b77ef/html5/thumbnails/41.jpg)
When your radio set is tuned to an incoming radio signal, what occurs?
a. Forced vibrationb. Resonancec. Refractiond. Diffraction