Physics Web Assign Ch 14 #5

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When at rest, two trains have sirens that emit a frequency of 300 Hz. The trains travel toward one another and toward an observer stationed between them. One of the trains moves at 32.5 m/s, and the observer hears a beat frequency of 2.9 beats per second. What is the speed of the second train, which travels faster than 32.5 m/s?
_____ m/s
  1. Mike Birkhead
  2. Physics
  3. Webassign
  4. Web Assign
  5. College Physics
  6. MOB University
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by the way why there is V=334 not 343? Thank

bscouth