Conceptual Physics (12th Edition)

Published by Addison-Wesley
ISBN 10: 0321909100
ISBN 13: 978-0-32190-910-7

Chapter 21 - Think and Solve: 24

Answer

17 mm. 17 m.

Work Step by Step

The wave speed is frequency multiplied by wavelength. For the highest frequency: $v = 340 \frac{m}{s} = f \lambda = (20000 Hz)(\lambda)$. Solve for $\lambda = \frac{340 m/s}{20000 Hz} = 0.017 m$. For the lowest frequency: $v = 340 \frac{m}{s} = f \lambda = (20 Hz)(\lambda)$. Solve for $\lambda = \frac{340 m/s}{20 Hz} = 17 m$.
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