Physics Technology Update (4th Edition)

Published by Pearson
ISBN 10: 0-32190-308-0
ISBN 13: 978-0-32190-308-2

Chapter 14 - Waves and Sound - Problems and Conceptual Exercises - Page 491: 1

Answer

(a) $56cm$ (b) $6.5cm$

Work Step by Step

(a) We know that the horizontal distance from crest to trough is known as half of the wavelength. Thus $\frac{\lambda}{2}=28cm$ $\implies \lambda=2\times 28cm=56cm$ (b) We know that the maximum vertical displacement from the mean position is known as amplitude and the total distance from crest to trough is twice the amplitude. Thus $2A=13cm$ $\implies A=\frac{13}{2}cm=6.5cm$
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