Answered: (3) A harmonica makes sounds when a…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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a. this particular harmonica is in the key of D# and it can emit as a fundamental frequency f=311.13 Hz. What is the length of the reed?

b. What is the n=3 harmonic for this reed?

c. A person decides to produce the fundamental frequency on the harmonica in a room at T=20 degrees celsius while rolling around in their favorite chair at 8.19 m/s. They hear the echo of their playing off the wall that they are moving away from. What is the frequency of the echo heard by the harmonica player?

d. When an observer is 6.79m away from the harmonica player, the sound is 86.6 dB. What is the sound intensity level of the music when the observer is 41.6m away from the harmonica player?

(3) A harmonica makes sounds when a reed inside of it vibrates back and forth. We can
consider this to the same as a string with mass 16.5g that is fixed at both ends. The reed is
experiencing 639N of tension.

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