Fred strikes a steel train rail with a hammer at a frequency of 2.50 Hz, and Wilma

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Fred strikes a steel train rail with a hammer at a frequency of 2.50 Hz, and Wilma puts her ear to the rail 1.0 km away.
(a) How long after the first strike does Wilma hear the sound?
(b) What is the time interval between the successive sound pulses she hears?
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College Physics

ISBN: 978-0321601834

7th edition

Authors: Jerry D. Wilson, Anthony J. Buffa, Bo Lou

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