Railroad track and sound waves


by m.l.
Tags: ears, railroad, sound waves
m.l.
m.l. is offline
#1
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?
Phys.Org News Partner Science news on Phys.org
Going nuts? Turkey looks to pistachios to heat new eco-city
Space-tested fluid flow concept advances infectious disease diagnoses
SpaceX launches supplies to space station (Update)
Kurdt
Kurdt is offline
#2
Apr17-09, 03:56 AM
Emeritus
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?


Register to reply

Related Discussions
Can light enegry or waves affects sound waves? General Physics 7
Comparing sound waves to waves in a Coaxial Cable aka T.E.M. Advanced Physics Homework 5
why will ultrasonic waves not interfere with other sound waves in water? Introductory Physics Homework 1
Sound Intensity and Sound Waves Introductory Physics Homework 5
Longitudal waves - sound waves General Physics 2