There is a horn which has to work at 20 kHz and its length is to be half the wave length of the vibration. At the transducer end, the horn has a cross section of 8×8 cm2 and from this cross section two of the sides exponentially reduce to 4 mm. The other two sides remains at 8 cm only. If the velocity of sound in the medium is 4800 m/s, find what is the length of the horn?

Principles of Physics: A Calculus-Based Text
5th Edition
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter13: Mechanical Waves
Section: Chapter Questions
Problem 15P: A steel wire of length 30.0 m and a copper wire of length 20.0 m, both with 1.00-mm diameters, are...
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There is a horn which has to work at 20 kHz and its length is to be half the wave length of the vibration. At the transducer end, the horn has a cross section of 8×8 cm2 and from this cross section two of the sides exponentially reduce to 4 mm. The other two sides remains at 8 cm only. If the velocity of sound in the medium is 4800 m/s, find what is the length of the horn? 

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