Answer
$T = 0.033~s$
Work Step by Step
We found that $\lambda = 40~cm$ and $v = 12~m/s$
We can find the period:
$T = \frac{\lambda}{v}$
$T = \frac{0.40~m}{12~m/s}$
$T = 0.033~s$
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 473: 23d
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