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Chapter 16: Q. 31 (page 452)
A loudspeaker at the origin emits a 120 Hz tone on a day when the speed of sound is 340 m/s. The phase difference between two points on the x-axis is 5.5 rad. What is the distance between these two points?
The distance between the two points is.
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A mother hawk screeches as she dives at you. You recall from biology that female hawks screech at 800 Hz, but you hear the screech at 900 Hz. How fast is the hawk approaching?
A 20.0-cm-long, 10.0-cm-diameter cylinder with a piston at
one end contains 1.34 kg of an unknown liquid. Using the piston
to compress the length of the liquid by 1.00 mm increases the
pressure by 41.0 atm. What is the speed of sound in the liquid?
The G string on a guitar is a 0.46-mm-diameter steel string
with a linear density of 1.3 g/m. When the string is properly
tuned to 196 Hz, the wave speed on the string is 250 m/s. Tuning
is done by turning the tuning screw, which slowly tightens—and
stretches—the string. By how many mm does a 75-cm-long G
string stretch when it’s first tuned?
A wave travels with speed 200 m/s. Its wave number is 1.5 rad/m. What are its (a) wavelength and (b) frequency?
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