Answer
$f=20\times 10^3Hz$
Work Step by Step
As $\frac{\lambda}{2}=3.8cm$,
$\lambda=7.6cm=0.076m$
We know that,
$v=f\lambda$
$f=\frac{v}{\lambda}$
We plug in the known values to obtain:
$f=\frac{1500}{0.076}=20\times 10^3Hz$
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 509: 42
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