Answer
11 km/h
Work Step by Step
Find the speed by using equation 12–5.
$$sin \theta=\frac{v_{wave}}{v_{obj}}$$
$$v_{obj}=\frac{v_{wave}}{ sin \theta }=\frac{2.2km/h}{sin12^{\circ}}=10.58 km/h \approx 11 km/h$$
Physics: Principles with Applications (7th Edition)
by Giancoli, Douglas C.
Published by
Pearson
ISBN 10:
0-32162-592-7
ISBN 13:
978-0-32162-592-2
Chapter 12 - Sound - Problems - Page 356: 65
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