Answer
$f_3=23.7Hz$
Work Step by Step
$f_n=\frac{n}{2}\sqrt\frac{T}{LM}$
We plug in the known values to obtain:
$f_n=\frac{n}{2}\sqrt\frac{250}{(10)(0.1)}=n(7.91)Hz$
Therefore, the third lowest frequency is:
$f_3=3(7.91)=23.7Hz$
Fundamentals of Physics Extended (10th Edition)
by Halliday, David; Resnick, Robert; Walker, Jearl
Published by
Wiley
ISBN 10:
1-11823-072-8
ISBN 13:
978-1-11823-072-5
Chapter 16 - Waves-I - Problems - Page 474: 43c
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