# HW 3 - 1.1/6 points | Previous AnswersWalker4 14.P.071.My...

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1. 1/6 points | Previous AnswersWalker4 14.P.071. My Notes | The human ear canal is much like an organ pipe that is closed at one end  (at the tympanic membrane, or eardrum) and open at the other (see the  figure below). Suppose that a man's eardrum is of length  L  =  2.67  cm. (a) What is the fundamental frequency and wavelength of the ear canal?   kHz   cm (b) Find the frequency and wavelength of the ear canal's third harmonic.  (Recall that the third harmonic in this case is the standing wave with the  second-lowest frequency.)   kHz   cm (c) Suppose a person has an ear canal that is  shorter  than  2.67  cm. Is the  fundamental frequency of that person's ear canal greater than, less than,  or the same as the value found in part (a)?   Explain.

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2. –/1 points Walker4 25.P.002. My Notes | The electric field of an electromagnetic wave points in the  positive   x - direction. At the same time, the magnetic field of this wave points in  the  negative   z -direction. In what direction is the wave traveling?  + x -direction − x -direction     + y -direction − y -direction + z -direction − z -direction 3. –/3 points Walker4 25.P.003. My Notes | An electric charge on the  z -axis oscillates sinusoidally about the origin. A  distant observer is located at a point on the  negative  x -axis. (a) In what direction will the electric field oscillate at the observer's  location?
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## This note was uploaded on 03/08/2012 for the course PHYS 116 taught by Professor Staff during the Fall '08 term at University of Washington.

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HW 3 - 1.1/6 points | Previous AnswersWalker4 14.P.071.My...

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