Sound
Practice Test
1.
During the Doppler shift, approaching sound waves __________.
a.
shorten
b.
decrease frequency
c.
gain amplitude
d.
lengthen
Hint
2.
The __________ of sound waves measures loudness.
a.
frequency
b.
period
c.
amplitude
d.
speed
Hint
3.
The sound from a string instrument, like a guitar, results from __________.
a.
vibrating lips
b.
vibrating brass
c.
vibrating strings
d.
vibrating reeds
Hint
4.
In Figure 15-13, If the length of the pipe is 0.75 m, what is the fundamental wavelength?
a.
0.38 m
b.
0.50 m
c.
1.5 m
d.
0.75 m
Hint
