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23 Nov 2019

An air-filled pipe is found to have successive harmonics at 770Hz ,990Hz , and 1210Hz . It is unknown whether harmonics below 770Hzand above 1210Hz exist in the pipe.

What is the length of the pipe?

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Elin Hessel
Elin HesselLv2
28 Feb 2019

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

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2) a) A tube consists of two pipes, one just slightly smaller thanthe other, that can slide in and out like a telescope. Each pieceis approximately 35cm long. A tuning fork is held at one end as onetube is slid into the other. The apparatus is heard to resonate atvarious total lengths, which are recorded in the table below.Discuss which harmonics these are and whether the pipe likely to besealed at the opposite end. Sketch these harmonics. Also determinethe frequency of the tuning fork. [Note: The student’s measurementsare close, but might not be precise.] Make sure you state theevidence for your conclusions.
Lengths (cm)
46.2
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b) A variety of strings are seen to vibrate as seen below. Someends are fixed in place and some are free to slide along a rigidrod. The lengths, masses and tensions are given. Rank theseaccording to the frequency of the oscillation. (Least togreatest)
L=40cm, m=10g, FT=100N L=30cm, m=20g, FT=150N
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