Railroad track and sound waves

by m.l.
Tags: ears, railroad, sound waves
m.l. is offline
Apr16-09, 03:35 PM
P: 5
1. The problem statement, all variables and given/known data
People put their ears to a railroad track to get an early warning of an approaching train. why did this work.

2. Relevant equations
written response.

3. The attempt at a solution
Sound waves can travel a long way along an undisturbed metal rod?
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Kurdt is offline
Apr17-09, 03:56 AM
Sci Advisor
PF Gold
P: 4,975
The rod has to be disturbed for any sound to be carried along it. Apart from travelling a long way in the rail, what other property does sound have in the metal that is greater than in air that would be an advantage?

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