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- 1. Multiple Choice
What is the speed of sound at room temperature (20°C)?
300 m/s
323 m/s
343 m/s
434 m/s
- 2. Multiple Choice
If an observer hears the sound of a baseball hitting a bat 0.75 s after impact on a day when the temperature is 20°C, how far is the batter from the observer?
200.2 meters
275.3 meters
257.3 meters
273.5 meters
- 3. Multiple Choice
A stationary woman on the side of the road hears a siren as an ambulance approaches at 30.0 m/s. If she hears a frequency of 440 Hz, and it is 20°C, what is the frequency of the siren at the source?
402 Hz
442 Hz
452 Hz
432 Hz
- 4. Multiple Choice
If a sound wave is traveling when the temperature is 20°C and has a wavelength of 2.45 m, what is the frequency of the sound?
130 Hz
210 Hz
14.1 Hz
140 Hz
- 5. Multiple Choice
the change in frequency of sound caused by a moving sound source or a moving observer is known as ______________.
Sound wave
Sound level
Harmonics
Doppler effect
- 6. Multiple Choice
The unit of measurement for the level of a sound is also known as a(n) _________________.
Decibel
Joule
Hertz
Angstrom
- 7. Multiple Choice
the logarithmic scale that measures the amplitudes of sounds that humans can hear is called ______________.
Decibels
Harmonics
Sound level
Loudness
- 8. Multiple Choice
The highness or lowness of a sound, which depends on frequency, is known as _________________.
Resonance
Pitch
Harmonics
Consonance
- 9. Multiple Choice
An unpleasant, jarring combination of pitches can be called ____________.
Consonance
Resonance
Loudness
Dissonance
- 10. Multiple Choice
Which of the following can use echoes to determine the distance to an object?
bats
cameras
ships using sonar
all of the above
- 11. Multiple Choice
How long is a wave that has a frequency of 440 Hz and is moving through sea water at 1530 m/s?
5.3 meters
3.5 meters
4.3 meters
0.3 meters
- 12. Multiple Choice
Which of the following is the correct definition of a sound wave?
A pressure variation that is transmitted through matter.
A disturbance in which the medium's particles follow a circular path.
Movement of an object back and forth between two points
A wave whose disturbances occur at a constant rate.
- 13. Multiple Choice
In the picture, how many nodes appear in figure A?
1
2
3
4
- 14. Multiple Choice
In the picture, how many antinodes appear in figure B?
1
2
3
4
- 15. Multiple Choice
In the picture, which of the figures has the highest frequency?
A
B
C
The frequency is the same for all three
- 16. Multiple Choice
As a train speeds away from a station, its whistle sounds with a frequency of 624 Hz. For a listener standing on the platform of the station, sound waves from the whistle have a frequency of 580 Hz. What is the velocity of the train? Assume standard air conditions.
26 m/s
62 m/s
13 m/s
22 m/s
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