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

## Waves_Physics_classroom

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This document contains either a study guide OR pairs of exams taken from the same exam bank
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### 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