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Unformatted text preview: 252 College Physics II Exercise 3 1. A sinusoidal transverse wave is traveling along a string toward decreasing x . shows a plot of the displacement as a function of position at time t = 0. The string tension is 3.6 N, and its linear density is 25 g/m. (a) Find the amplitude of the wave. (b) Find the wavelength of the wave. (c) Find the wave speed of the wave. (d) Find the period of the wave. (e) Find the maximum speed of a particle in the string. (f) Write an equation describing the traveling wave. 2. At a rock concert, a dB meter registered 130 dB when placed 2.8 m in front of a loudspeaker on the stage. (a) What was the power output of the speaker, assuming uniform spherical spreading of the sound and neglecting absorption in the air? (b) How far away would the sound level be a somewhat reasonable 90 dB? 3. Speakers A and B are vibrating in phase. They are directly facing each other, are 7.80 m apart, and are each playing a 73.0-Hz tone. The speed of the sound is 343 m/s. On the line between the and are each playing a 73....
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This note was uploaded on 02/22/2012 for the course CHEM yscn0027 taught by Professor Drtong during the Fall '10 term at HKU.
- Fall '10