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Ch 26 Sound
Test Description: Review for Ch 26 Exam
Instructions: Answer all questions to get your test result.
1) An explosion occurs 340 km away. Given that sound travels at 340 m/s, the time the sound takes to reach you is
A
100 s
B
200 s
C
1000 s
D
10 s
2) Sound waves in air are a series of
A
all of the choices
B
periodic compressions and rarefactions.
C
high- and low-pressure regions.
D
periodic disturbances.
3) A sound wave is a
A
standing wave.
B
transverse wave.
C
shock wave.
D
longitudinal wave.
4) The speed of a sound wave in a gas depends on
A
frequency
B
mass of the particles in the gas
C
temperature
D
temperature and mass of the particles in the gas
5) The phenomenon of beats results from sound
A
interference.
B
reflection.
C
all of the choices
D
refraction.
6) The Tacoma Narrows Bridge collapsed due to
A
frequency modulation.
B
destructive interference.
C
resonance.
D
beats.
7) A 680-Hz sound wave travels at 340 m/s in air, with a wavelength of
A
0.5 m
B
500 m
C
5 m
D
50 m
8) Beats are produced when two tuning forks, one of frequency 240 Hz and the other of frequency 248 Hz, are sounded together. The frequency of the beats is
A
8 Hz
B
4 Hz
C
None of the choices
D
16 Hz
9) If the sounding board were left out of a music box, the music box would
A
make little plinking sounds
B
sound the same as usual.
C
not sound at all.
D
None of the choices
10) The speed of sound in a material depends on the
A
mass
B
elasticity of the material
C
volume of the material
D
None of the choices
*select an answer for all questions
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