Monday
April 21, 2014

Homework Help: Physics

Posted by Ben on Tuesday, September 3, 2013 at 6:14pm.

A light-rail commuter train blows its 200 Hz horn as it approaches a crossing. The speed of sound is 336 m/s.

a)An observer waiting at the crossing receives a frequency of 205 Hz. What is the speed of the train?

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