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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
1000 s
C
10 s
D
200 s
2) Sound waves in air are a series of
A
periodic compressions and rarefactions.
B
high- and low-pressure regions.
C
periodic disturbances.
D
all of the choices
3) A sound wave is a
A
shock wave.
B
transverse wave.
C
longitudinal wave.
D
standing wave.
4) The speed of a sound wave in a gas depends on
A
frequency
B
temperature and mass of the particles in the gas
C
mass of the particles in the gas
D
temperature
5) The phenomenon of beats results from sound
A
reflection.
B
all of the choices
C
interference.
D
refraction.
6) The Tacoma Narrows Bridge collapsed due to
A
frequency modulation.
B
resonance.
C
destructive interference.
D
beats.
7) A 680-Hz sound wave travels at 340 m/s in air, with a wavelength of
A
50 m
B
0.5 m
C
500 m
D
5 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
None of the choices
B
16 Hz
C
8 Hz
D
4 Hz
9) If the sounding board were left out of a music box, the music box would
A
None of the choices
B
not sound at all.
C
sound the same as usual.
D
make little plinking sounds
10) The speed of sound in a material depends on the
A
None of the choices
B
mass
C
volume of the material
D
elasticity of the material
*select an answer for all questions
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