Answer
$f=158Hz$
Work Step by Step
From given equation we have
$k=0.9\pi$
$\omega=315\pi$
As we know that
$\omega=2\pi f$
$f=\frac{\omega}{2\pi}$
We plug in the known values to obtain:
$f=\frac{315\pi}{2\pi}=158Hz$
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 17 - Waves-II - Problems - Page 506: 12b
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