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Chapter 16: Q. 3 (page 451)
A 25 g string is under 20 N of tension. A pulse travels the length of the string in 50 ms. How long is the string?
The length of the string is 2 meters
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A rope of mass m and length L hangs from a ceiling. a. Show that the wave speed on the rope a distance y above the lower end is v = 1gy. b. Show that the time for a pulse to travel the length of the string is ∆t = 22L/g.
FIGURE Q16.9 shows the wavefronts of a circular wave. What is the phase difference between
(a) points A and B,
(b) points C and D, and
(c) points E and F?
Sound wave A delivers 2 J of energy in 2 s. Sound wave B delivers 10 J of energy in 5 s. Sound wave C delivers 2 mJ of energy in 1 ms. Rank in order, from largest to smallest, the sound powers PA, PB, and PC of these three sound waves. Explain
Show that the Doppler frequency f- of a receding source is
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?
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