How things work college course/Waves (Physics Classroom)/Testbank

File:Quizbankdatabase htw Waves (PC).pdf

Waves_Physics_classroom
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 * This document contains either a study guide OR pairs of exams taken from the same exam bank:
 * If two exams have the same s-number, then v1 and v2 have the same questions, presented in different (random) order.
 * Exams with different s-numbers have different questions and may not have the same difficulty.
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 * At the end of this document:
 * Attribution for the quizzes identifies where the questions were obtained
 * Study guide links reading materials and/or relevant equations.

Waves_Physics_classroom-v1s1
1. A dense rope is connected to a rope with less density (i.e. fewer kilograms per meter). If the rope is stretched and a wave is sent along high density rope,
 * ___ a) the low density rope supports a wave with a higher speed


 * ___ b) the low density rope supports a wave with a lower frequency


 * ___ c) the low density rope supports a wave with a higher frequency


 * ___ d) the low density rope supports a wave with a lower speed

2. Two signals (dashed) add to a solid
 * ___ a) dissonance


 * ___ b) fifth


 * ___ c) octave

3. These two pulses will collide and produce
 * ___ a) negative interference


 * ___ b) positive interference


 * ___ c) positive diffraction


 * ___ d) negative diffraction

4. If you start moving towards a source of sound, the pitch becomes
 * ___ a) higher


 * ___ b) unchanged


 * ___ c) lower

5. Two signals (dashed) add to a solid
 * ___ a) fifth


 * ___ b) octave


 * ___ c) dissonance

6. When a wave is reflected off a stationary barrier, the reflected wave
 * ___ a) has higher frequency than the incident wave


 * ___ b) has lower amplitude than the incident wave


 * ___ c) both of these are true

7. What happens to the wavelength on a wave on a stretched string if the wave passes from lightweight (low density) region of the rope to a heavy (high density) rope?
 * ___ a) the wavelength gets longer


 * ___ b) the wavelength stays the same


 * ___ c) the wavelength gets shorter

8. Why don't we hear beats when two different notes on a piano are played at the same time?
 * ___ a) The beats happen so many times per second you can't hear them.


 * ___ b) Reverberation usually stifles the beats


 * ___ c) Echo usually stifles the beats


 * ___ d) The note is over by the time the first beat is heard

9. A tuning fork with a frequency of 440 Hz is played simultaneously with a tuning fork of 442 Hz. How many beats are heard in 10 seconds?
 * ___ a) 50


 * ___ b) 60


 * ___ c) 20


 * ___ d) 40


 * ___ e) 30

10. Comparing a typical church to a professional baseball stadium, the church is likely to have
 * ___ a) reverberation instead of echo


 * ___ b) echo instead of reverberation


 * ___ c) both reverberation and echo


 * ___ d) neither reverberation nor echo

11. Why do rough walls give a concert hall a “fuller” sound, compared to smooth walls?
 * ___ a) The difference in path lengths creates more reverberation.


 * ___ b) Rough walls make for a louder sound.


 * ___ c) The difference in path lengths creates more echo.

12. If a source of sound is moving towards you, the pitch becomes
 * ___ a) unchanged


 * ___ b) higher


 * ___ c) lower

13. These two pulses will collide and produce
 * ___ a) positive interference


 * ___ b) negative diffraction


 * ___ c) positive diffraction


 * ___ d) negative interference

14. Two signals (dashed) add to a solid
 * ___ a) dissonance


 * ___ b) fifth


 * ___ c) octave

15. People don't usually perceive an echo when
 * ___ a) it takes more than a tenth of a second after the original sound to arrive


 * ___ b) it arrives less than a tenth of a second after the original sound


 * ___ c) it arrives at a lower pitch


 * ___ d) it arrives at exactly the same pitch


 * ___ e) it arrives at a higher pitch

16. These two pulses will collide and produce
 * ___ a) negative interference


 * ___ b) positive interference


 * ___ c) positive diffraction


 * ___ d) negative diffraction

Key to Waves_Physics_classroom-v1s1
1. A dense rope is connected to a rope with less density (i.e. fewer kilograms per meter). If the rope is stretched and a wave is sent along high density rope,
 * + a) the low density rope supports a wave with a higher speed


 * - b) the low density rope supports a wave with a lower frequency


 * - c) the low density rope supports a wave with a higher frequency


 * - d) the low density rope supports a wave with a lower speed

2. Two signals (dashed) add to a solid
 * - a) dissonance


 * + b) fifth


 * - c) octave

3. These two pulses will collide and produce
 * + a) negative interference


 * - b) positive interference


 * - c) positive diffraction


 * - d) negative diffraction

4. If you start moving towards a source of sound, the pitch becomes
 * + a) higher


 * - b) unchanged


 * - c) lower

5. Two signals (dashed) add to a solid
 * - a) fifth


 * + b) octave


 * - c) dissonance

6. When a wave is reflected off a stationary barrier, the reflected wave
 * - a) has higher frequency than the incident wave


 * + b) has lower amplitude than the incident wave


 * - c) both of these are true

7. What happens to the wavelength on a wave on a stretched string if the wave passes from lightweight (low density) region of the rope to a heavy (high density) rope?
 * + a) the wavelength gets longer


 * - b) the wavelength stays the same


 * - c) the wavelength gets shorter

8. Why don't we hear beats when two different notes on a piano are played at the same time?
 * + a) The beats happen so many times per second you can't hear them.


 * - b) Reverberation usually stifles the beats


 * - c) Echo usually stifles the beats


 * - d) The note is over by the time the first beat is heard

9. A tuning fork with a frequency of 440 Hz is played simultaneously with a tuning fork of 442 Hz. How many beats are heard in 10 seconds?
 * - a) 50


 * - b) 60


 * + c) 20


 * - d) 40


 * - e) 30

10. Comparing a typical church to a professional baseball stadium, the church is likely to have
 * + a) reverberation instead of echo


 * - b) echo instead of reverberation


 * - c) both reverberation and echo


 * - d) neither reverberation nor echo

11. Why do rough walls give a concert hall a “fuller” sound, compared to smooth walls?
 * + a) The difference in path lengths creates more reverberation.


 * - b) Rough walls make for a louder sound.


 * - c) The difference in path lengths creates more echo.

12. If a source of sound is moving towards you, the pitch becomes
 * - a) unchanged


 * + b) higher


 * - c) lower

13. These two pulses will collide and produce
 * + a) positive interference


 * - b) negative diffraction


 * - c) positive diffraction


 * - d) negative interference

14. Two signals (dashed) add to a solid
 * + a) dissonance


 * - b) fifth


 * - c) octave

15. People don't usually perceive an echo when
 * - a) it takes more than a tenth of a second after the original sound to arrive


 * + b) it arrives less than a tenth of a second after the original sound


 * - c) it arrives at a lower pitch


 * - d) it arrives at exactly the same pitch


 * - e) it arrives at a higher pitch

16. These two pulses will collide and produce
 * - a) negative interference


 * + b) positive interference


 * - c) positive diffraction


 * - d) negative diffraction

Waves_Physics_classroom-v2s1
1. A tuning fork with a frequency of 440 Hz is played simultaneously with a tuning fork of 442 Hz. How many beats are heard in 10 seconds?
 * ___ a) 50


 * ___ b) 60


 * ___ c) 20


 * ___ d) 30


 * ___ e) 40

2. People don't usually perceive an echo when
 * ___ a) it takes more than a tenth of a second after the original sound to arrive


 * ___ b) it arrives at a lower pitch


 * ___ c) it arrives at exactly the same pitch


 * ___ d) it arrives at a higher pitch


 * ___ e) it arrives less than a tenth of a second after the original sound

3. What happens to the wavelength on a wave on a stretched string if the wave passes from lightweight (low density) region of the rope to a heavy (high density) rope?
 * ___ a) the wavelength stays the same


 * ___ b) the wavelength gets shorter


 * ___ c) the wavelength gets longer

4. Why don't we hear beats when two different notes on a piano are played at the same time?
 * ___ a) The note is over by the time the first beat is heard


 * ___ b) Reverberation usually stifles the beats


 * ___ c) The beats happen so many times per second you can't hear them.


 * ___ d) Echo usually stifles the beats

5. If a source of sound is moving towards you, the pitch becomes
 * ___ a) unchanged


 * ___ b) higher


 * ___ c) lower

6. Comparing a typical church to a professional baseball stadium, the church is likely to have
 * ___ a) reverberation instead of echo


 * ___ b) echo instead of reverberation


 * ___ c) neither reverberation nor echo


 * ___ d) both reverberation and echo

7. Two signals (dashed) add to a solid
 * ___ a) octave


 * ___ b) dissonance


 * ___ c) fifth

8. When a wave is reflected off a stationary barrier, the reflected wave
 * ___ a) both of these are true


 * ___ b) has higher frequency than the incident wave


 * ___ c) has lower amplitude than the incident wave

9. If you start moving towards a source of sound, the pitch becomes
 * ___ a) unchanged


 * ___ b) higher


 * ___ c) lower

10. These two pulses will collide and produce
 * ___ a) positive diffraction


 * ___ b) negative diffraction


 * ___ c) positive interference


 * ___ d) negative interference

11. Two signals (dashed) add to a solid
 * ___ a) octave


 * ___ b) dissonance


 * ___ c) fifth

12. Why do rough walls give a concert hall a “fuller” sound, compared to smooth walls?
 * ___ a) The difference in path lengths creates more reverberation.


 * ___ b) Rough walls make for a louder sound.


 * ___ c) The difference in path lengths creates more echo.

13. These two pulses will collide and produce
 * ___ a) negative diffraction


 * ___ b) positive interference


 * ___ c) negative interference


 * ___ d) positive diffraction

14. A dense rope is connected to a rope with less density (i.e. fewer kilograms per meter). If the rope is stretched and a wave is sent along high density rope,
 * ___ a) the low density rope supports a wave with a lower frequency


 * ___ b) the low density rope supports a wave with a higher speed


 * ___ c) the low density rope supports a wave with a lower speed


 * ___ d) the low density rope supports a wave with a higher frequency

15. These two pulses will collide and produce
 * ___ a) positive interference


 * ___ b) negative interference


 * ___ c) positive diffraction


 * ___ d) negative diffraction

16. Two signals (dashed) add to a solid
 * ___ a) fifth


 * ___ b) dissonance


 * ___ c) octave

Key to Waves_Physics_classroom-v2s1
1. A tuning fork with a frequency of 440 Hz is played simultaneously with a tuning fork of 442 Hz. How many beats are heard in 10 seconds?
 * - a) 50


 * - b) 60


 * + c) 20


 * - d) 30


 * - e) 40

2. People don't usually perceive an echo when
 * - a) it takes more than a tenth of a second after the original sound to arrive


 * - b) it arrives at a lower pitch


 * - c) it arrives at exactly the same pitch


 * - d) it arrives at a higher pitch


 * + e) it arrives less than a tenth of a second after the original sound

3. What happens to the wavelength on a wave on a stretched string if the wave passes from lightweight (low density) region of the rope to a heavy (high density) rope?
 * - a) the wavelength stays the same


 * - b) the wavelength gets shorter


 * + c) the wavelength gets longer

4. Why don't we hear beats when two different notes on a piano are played at the same time?
 * - a) The note is over by the time the first beat is heard


 * - b) Reverberation usually stifles the beats


 * + c) The beats happen so many times per second you can't hear them.


 * - d) Echo usually stifles the beats

5. If a source of sound is moving towards you, the pitch becomes
 * - a) unchanged


 * + b) higher


 * - c) lower

6. Comparing a typical church to a professional baseball stadium, the church is likely to have
 * + a) reverberation instead of echo


 * - b) echo instead of reverberation


 * - c) neither reverberation nor echo


 * - d) both reverberation and echo

7. Two signals (dashed) add to a solid
 * - a) octave


 * - b) dissonance


 * + c) fifth

8. When a wave is reflected off a stationary barrier, the reflected wave
 * - a) both of these are true


 * - b) has higher frequency than the incident wave


 * + c) has lower amplitude than the incident wave

9. If you start moving towards a source of sound, the pitch becomes
 * - a) unchanged


 * + b) higher


 * - c) lower

10. These two pulses will collide and produce
 * - a) positive diffraction


 * - b) negative diffraction


 * + c) positive interference


 * - d) negative interference

11. Two signals (dashed) add to a solid
 * - a) octave


 * + b) dissonance


 * - c) fifth

12. Why do rough walls give a concert hall a “fuller” sound, compared to smooth walls?
 * + a) The difference in path lengths creates more reverberation.


 * - b) Rough walls make for a louder sound.


 * - c) The difference in path lengths creates more echo.

13. These two pulses will collide and produce
 * - a) negative diffraction


 * + b) positive interference


 * - c) negative interference


 * - d) positive diffraction

14. A dense rope is connected to a rope with less density (i.e. fewer kilograms per meter). If the rope is stretched and a wave is sent along high density rope,
 * - a) the low density rope supports a wave with a lower frequency


 * + b) the low density rope supports a wave with a higher speed


 * - c) the low density rope supports a wave with a lower speed


 * - d) the low density rope supports a wave with a higher frequency

15. These two pulses will collide and produce
 * - a) positive interference


 * + b) negative interference


 * - c) positive diffraction


 * - d) negative diffraction

16. Two signals (dashed) add to a solid
 * - a) fifth


 * - b) dissonance


 * + c) octave

Waves_Physics_classroom-v1s2
1. These two pulses will collide and produce
 * ___ a) positive diffraction


 * ___ b) negative diffraction


 * ___ c) negative interference


 * ___ d) positive interference

2. What happens to the wavelength on a wave on a stretched string if the wave passes from lightweight (low density) region of the rope to a heavy (high density) rope?
 * ___ a) the wavelength stays the same


 * ___ b) the wavelength gets shorter


 * ___ c) the wavelength gets longer

3. Two signals (dashed) add to a solid
 * ___ a) octave


 * ___ b) dissonance


 * ___ c) fifth

4. Why don't we hear beats when two different notes on a piano are played at the same time?
 * ___ a) The note is over by the time the first beat is heard


 * ___ b) Echo usually stifles the beats


 * ___ c) Reverberation usually stifles the beats


 * ___ d) The beats happen so many times per second you can't hear them.

5. Why do rough walls give a concert hall a “fuller” sound, compared to smooth walls?
 * ___ a) The difference in path lengths creates more reverberation.


 * ___ b) Rough walls make for a louder sound.


 * ___ c) The difference in path lengths creates more echo.

6. These two pulses will collide and produce
 * ___ a) positive interference


 * ___ b) negative diffraction


 * ___ c) negative interference


 * ___ d) positive diffraction

7. People don't usually perceive an echo when
 * ___ a) it arrives at a lower pitch


 * ___ b) it arrives at a higher pitch


 * ___ c) it arrives less than a tenth of a second after the original sound


 * ___ d) it arrives at exactly the same pitch


 * ___ e) it takes more than a tenth of a second after the original sound to arrive

8. If a source of sound is moving towards you, the pitch becomes
 * ___ a) lower


 * ___ b) higher


 * ___ c) unchanged

9. A tuning fork with a frequency of 440 Hz is played simultaneously with a tuning fork of 442 Hz. How many beats are heard in 10 seconds?
 * ___ a) 50


 * ___ b) 40


 * ___ c) 30


 * ___ d) 60


 * ___ e) 20

10. These two pulses will collide and produce
 * ___ a) negative interference


 * ___ b) positive interference


 * ___ c) negative diffraction


 * ___ d) positive diffraction

11. Two signals (dashed) add to a solid
 * ___ a) octave


 * ___ b) dissonance


 * ___ c) fifth

12. Comparing a typical church to a professional baseball stadium, the church is likely to have
 * ___ a) both reverberation and echo


 * ___ b) neither reverberation nor echo


 * ___ c) echo instead of reverberation


 * ___ d) reverberation instead of echo

13. A dense rope is connected to a rope with less density (i.e. fewer kilograms per meter). If the rope is stretched and a wave is sent along high density rope,
 * ___ a) the low density rope supports a wave with a higher frequency


 * ___ b) the low density rope supports a wave with a lower frequency


 * ___ c) the low density rope supports a wave with a higher speed


 * ___ d) the low density rope supports a wave with a lower speed

14. Two signals (dashed) add to a solid
 * ___ a) dissonance


 * ___ b) octave


 * ___ c) fifth

15. If you start moving towards a source of sound, the pitch becomes
 * ___ a) higher


 * ___ b) unchanged


 * ___ c) lower

16. When a wave is reflected off a stationary barrier, the reflected wave
 * ___ a) has higher frequency than the incident wave


 * ___ b) has lower amplitude than the incident wave


 * ___ c) both of these are true

Key to Waves_Physics_classroom-v1s2
1. These two pulses will collide and produce
 * - a) positive diffraction


 * - b) negative diffraction


 * - c) negative interference


 * + d) positive interference

2. What happens to the wavelength on a wave on a stretched string if the wave passes from lightweight (low density) region of the rope to a heavy (high density) rope?
 * - a) the wavelength stays the same


 * - b) the wavelength gets shorter


 * + c) the wavelength gets longer

3. Two signals (dashed) add to a solid
 * - a) octave


 * - b) dissonance


 * + c) fifth

4. Why don't we hear beats when two different notes on a piano are played at the same time?
 * - a) The note is over by the time the first beat is heard


 * - b) Echo usually stifles the beats


 * - c) Reverberation usually stifles the beats


 * + d) The beats happen so many times per second you can't hear them.

5. Why do rough walls give a concert hall a “fuller” sound, compared to smooth walls?
 * + a) The difference in path lengths creates more reverberation.


 * - b) Rough walls make for a louder sound.


 * - c) The difference in path lengths creates more echo.

6. These two pulses will collide and produce
 * + a) positive interference


 * - b) negative diffraction


 * - c) negative interference


 * - d) positive diffraction

7. People don't usually perceive an echo when
 * - a) it arrives at a lower pitch


 * - b) it arrives at a higher pitch


 * + c) it arrives less than a tenth of a second after the original sound


 * - d) it arrives at exactly the same pitch


 * - e) it takes more than a tenth of a second after the original sound to arrive

8. If a source of sound is moving towards you, the pitch becomes
 * - a) lower


 * + b) higher


 * - c) unchanged

9. A tuning fork with a frequency of 440 Hz is played simultaneously with a tuning fork of 442 Hz. How many beats are heard in 10 seconds?
 * - a) 50


 * - b) 40


 * - c) 30


 * - d) 60


 * + e) 20

10. These two pulses will collide and produce
 * + a) negative interference


 * - b) positive interference


 * - c) negative diffraction


 * - d) positive diffraction

11. Two signals (dashed) add to a solid
 * + a) octave


 * - b) dissonance


 * - c) fifth

12. Comparing a typical church to a professional baseball stadium, the church is likely to have
 * - a) both reverberation and echo


 * - b) neither reverberation nor echo


 * - c) echo instead of reverberation


 * + d) reverberation instead of echo

13. A dense rope is connected to a rope with less density (i.e. fewer kilograms per meter). If the rope is stretched and a wave is sent along high density rope,
 * - a) the low density rope supports a wave with a higher frequency


 * - b) the low density rope supports a wave with a lower frequency


 * + c) the low density rope supports a wave with a higher speed


 * - d) the low density rope supports a wave with a lower speed

14. Two signals (dashed) add to a solid
 * + a) dissonance


 * - b) octave


 * - c) fifth

15. If you start moving towards a source of sound, the pitch becomes
 * + a) higher


 * - b) unchanged


 * - c) lower

16. When a wave is reflected off a stationary barrier, the reflected wave
 * - a) has higher frequency than the incident wave


 * + b) has lower amplitude than the incident wave


 * - c) both of these are true

Waves_Physics_classroom-v2s2
1. If a source of sound is moving towards you, the pitch becomes
 * ___ a) unchanged


 * ___ b) lower


 * ___ c) higher

2. A dense rope is connected to a rope with less density (i.e. fewer kilograms per meter). If the rope is stretched and a wave is sent along high density rope,
 * ___ a) the low density rope supports a wave with a higher speed


 * ___ b) the low density rope supports a wave with a lower frequency


 * ___ c) the low density rope supports a wave with a higher frequency


 * ___ d) the low density rope supports a wave with a lower speed

3. Two signals (dashed) add to a solid
 * ___ a) octave


 * ___ b) fifth


 * ___ c) dissonance

4. These two pulses will collide and produce
 * ___ a) positive interference


 * ___ b) negative interference


 * ___ c) positive diffraction


 * ___ d) negative diffraction

5. People don't usually perceive an echo when
 * ___ a) it takes more than a tenth of a second after the original sound to arrive


 * ___ b) it arrives at a lower pitch


 * ___ c) it arrives at exactly the same pitch


 * ___ d) it arrives less than a tenth of a second after the original sound


 * ___ e) it arrives at a higher pitch

6. Why do rough walls give a concert hall a “fuller” sound, compared to smooth walls?
 * ___ a) Rough walls make for a louder sound.


 * ___ b) The difference in path lengths creates more echo.


 * ___ c) The difference in path lengths creates more reverberation.

7. These two pulses will collide and produce
 * ___ a) positive diffraction


 * ___ b) positive interference


 * ___ c) negative interference


 * ___ d) negative diffraction

8. Two signals (dashed) add to a solid
 * ___ a) fifth


 * ___ b) dissonance


 * ___ c) octave

9. Two signals (dashed) add to a solid
 * ___ a) fifth


 * ___ b) octave


 * ___ c) dissonance

10. What happens to the wavelength on a wave on a stretched string if the wave passes from lightweight (low density) region of the rope to a heavy (high density) rope?
 * ___ a) the wavelength gets shorter


 * ___ b) the wavelength gets longer


 * ___ c) the wavelength stays the same

11. Comparing a typical church to a professional baseball stadium, the church is likely to have
 * ___ a) neither reverberation nor echo


 * ___ b) both reverberation and echo


 * ___ c) reverberation instead of echo


 * ___ d) echo instead of reverberation

12. These two pulses will collide and produce
 * ___ a) positive interference


 * ___ b) positive diffraction


 * ___ c) negative interference


 * ___ d) negative diffraction

13. A tuning fork with a frequency of 440 Hz is played simultaneously with a tuning fork of 442 Hz. How many beats are heard in 10 seconds?
 * ___ a) 60


 * ___ b) 20


 * ___ c) 30


 * ___ d) 40


 * ___ e) 50

14. Why don't we hear beats when two different notes on a piano are played at the same time?
 * ___ a) The beats happen so many times per second you can't hear them.


 * ___ b) Reverberation usually stifles the beats


 * ___ c) The note is over by the time the first beat is heard


 * ___ d) Echo usually stifles the beats

15. If you start moving towards a source of sound, the pitch becomes
 * ___ a) lower


 * ___ b) higher


 * ___ c) unchanged

16. When a wave is reflected off a stationary barrier, the reflected wave
 * ___ a) both of these are true


 * ___ b) has lower amplitude than the incident wave


 * ___ c) has higher frequency than the incident wave

Key to Waves_Physics_classroom-v2s2
1. If a source of sound is moving towards you, the pitch becomes
 * - a) unchanged


 * - b) lower


 * + c) higher

2. A dense rope is connected to a rope with less density (i.e. fewer kilograms per meter). If the rope is stretched and a wave is sent along high density rope,
 * + a) the low density rope supports a wave with a higher speed


 * - b) the low density rope supports a wave with a lower frequency


 * - c) the low density rope supports a wave with a higher frequency


 * - d) the low density rope supports a wave with a lower speed

3. Two signals (dashed) add to a solid
 * - a) octave


 * - b) fifth


 * + c) dissonance

4. These two pulses will collide and produce
 * - a) positive interference


 * + b) negative interference


 * - c) positive diffraction


 * - d) negative diffraction

5. People don't usually perceive an echo when
 * - a) it takes more than a tenth of a second after the original sound to arrive


 * - b) it arrives at a lower pitch


 * - c) it arrives at exactly the same pitch


 * + d) it arrives less than a tenth of a second after the original sound


 * - e) it arrives at a higher pitch

6. Why do rough walls give a concert hall a “fuller” sound, compared to smooth walls?
 * - a) Rough walls make for a louder sound.


 * - b) The difference in path lengths creates more echo.


 * + c) The difference in path lengths creates more reverberation.

7. These two pulses will collide and produce
 * - a) positive diffraction


 * + b) positive interference


 * - c) negative interference


 * - d) negative diffraction

8. Two signals (dashed) add to a solid
 * + a) fifth


 * - b) dissonance


 * - c) octave

9. Two signals (dashed) add to a solid
 * - a) fifth


 * + b) octave


 * - c) dissonance

10. What happens to the wavelength on a wave on a stretched string if the wave passes from lightweight (low density) region of the rope to a heavy (high density) rope?
 * - a) the wavelength gets shorter


 * + b) the wavelength gets longer


 * - c) the wavelength stays the same

11. Comparing a typical church to a professional baseball stadium, the church is likely to have
 * - a) neither reverberation nor echo


 * - b) both reverberation and echo


 * + c) reverberation instead of echo


 * - d) echo instead of reverberation

12. These two pulses will collide and produce
 * + a) positive interference


 * - b) positive diffraction


 * - c) negative interference


 * - d) negative diffraction

13. A tuning fork with a frequency of 440 Hz is played simultaneously with a tuning fork of 442 Hz. How many beats are heard in 10 seconds?
 * - a) 60


 * + b) 20


 * - c) 30


 * - d) 40


 * - e) 50

14. Why don't we hear beats when two different notes on a piano are played at the same time?
 * + a) The beats happen so many times per second you can't hear them.


 * - b) Reverberation usually stifles the beats


 * - c) The note is over by the time the first beat is heard


 * - d) Echo usually stifles the beats

15. If you start moving towards a source of sound, the pitch becomes
 * - a) lower


 * + b) higher


 * - c) unchanged

16. When a wave is reflected off a stationary barrier, the reflected wave
 * - a) both of these are true


 * + b) has lower amplitude than the incident wave


 * - c) has higher frequency than the incident wave


 * Attribution (for quiz questions) under CC-by-SA license
 * http://en.wikiversity.org/wiki/How_things_work_college_course/Waves_(Physics_Classroom)
 * Study guide
 * http://www.physicsclassroom.com/class/waves