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Subject: Re: Distance/ Time


Author:
Enrico D.
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Date Posted: 23:32:33 03/15/03 Sat
In reply to: Randy 's message, "Distance/ Time" on 14:13:05 12/31/02 Tue

>A steel railroad track is struck with a hammer at one
>end and sound waves are observed at the other, both
>along the track and through the air. What is the time
>interval (sec.)between the two sounds as heard by the
>observer? How long is the track? (The speed of sound
>in steel is assumed to be 16,000 fps.)
>
>Please give step by step solution. Thanks for your
>assistance.
If the railroad makes a curve, better a circle, the sound will arrive forst by air than by steel....

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Replies:
[> Subject: rotation


Author:
Tina
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Date Posted: 12:22:14 10/04/03 Sat

A car goes on a 20,00-mile trip. the tires, including the spare, are rotated every 4,000 miles, so that the fire tires were used for an identical numer of miles. How many miles was each tire monted on the care, in use and is there another way of simplifying the problem?
>
>Please give step by step solution. Thanks for your
>assistance.

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