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Back to 17.7 The Doppler Effect

17.7 Exercise 10

Avg difficulty 2.5

A commuter train blows its 200-Hz horn as it approaches a crossing. The speed of sound is 335 m/s. (a) An observer waiting at the crossing receives a frequency of 208 Hz. What is the speed of the train? (b) What frequency does the observer receive as the train moves away?

OpenStax University Physics Volume 1, 17.7 The Doppler Effect, exercise 10

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Adapted from University Physics Volume 1 © 2016 Rice University. Licensed under CC BY 4.0. Source: University Physics Volume 1. Imported at revision db44eb9.