please answer the two questions please. Jennifer Aniston Destrc +xVw Assignment

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please answer the two questions please.

Jennifer Aniston Destrc +xVw Assignment 12-Chapter xYeChegg Study; Guided Solx -> C D www.webassign.net/web/Student/Assignment-Responses/last?dep= 13202815 1. +-/3 points HawkPSE1 14.P.016 My Notes Ask Your Teacher The speed of sound in air is 340.0 m/s. The angular frequency of a sound wave is 314.0 rad/s. Determine the following for the wave (a) frequency Hz (b) period (c) wavelength Need Help? ead. 2. +-/4 points HawkPSE1 14.P.042. My NotesAsk Your Teacher The displacement function at x = 9.00 m for a traveling wave is given by the following equation D(9.00, t) = (0.72 m) sin( 15.0-3.00t) where x is in metres, and t is in seconds (a) If the phase constant is zero, what are the wavelength, frequency, and speed of the wave? Hz m/s (b) Write the displacement function for an arbitrary x and t, that is, an equation for D(x, t). (Use the following as necessary: x, t. Assume SI units. Do not enter units in your expression.) D(x, t) = Need Help? Read it 3. +-/4 points HawkPSE1 14.P.047 My Notes Ask Your Teacher

Explanation / Answer

1) a) Frequency, f = /2 = 314/2 = 50 Hz

b) Period, T = 1/f = 1/50 = 0.02 s

c) Wavelength, = c/f = 340/50 = 6.8 m

2) a) We have, (2/)x = 15

Here, x = 9 m, so,

= 2x/15 = 2 * 9 / 15 = 3.77 m

f = /2 = 3/2 = 0.48 Hz

v = f = 3.77 * 0.48 = 1.81 /s

b) D(x.t) = 0.72 sin(1.67x - 3t)

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