Physics: Principles with Applications (7th Edition)

Published by Pearson
ISBN 10: 0-32162-592-7
ISBN 13: 978-0-32162-592-2

Chapter 12 - Sound - Problems - Page 355: 49

Answer

347 Hz

Work Step by Step

The beat frequency is 3 Hz, so the guitar string is 3 Hz away from 350 Hz, and must have a frequency of either 347 Hz or 353 Hz. Similarly, the 8 Hz beat frequency when the guitar string interferes with the 355-Hz tuning fork tells us that the guitar string’s frequency is either 347 Hz or 363 Hz. Only the 347 Hz frequency explains both observations.
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