What Is the Pulse Delay Time for a 20-Foot Coax Cable?

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Homework Help Overview

The discussion revolves around determining the pulse delay time for a 20-foot coaxial cable, with a focus on the relationship between speed, distance, and time in the context of electrical signals traveling through coax cables.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • Participants explore the relationship between speed, distance, and time, with one participant questioning if the term "pulse delay time" simply refers to this relationship. Others discuss the speed of electrical signals in coax cables.

Discussion Status

Participants are actively engaging with the problem, with some providing insights about the speed of signals in coax cables and confirming the basic relationship needed to approach the problem. There is no explicit consensus on the final approach yet.

Contextual Notes

One participant notes the lack of relevant information in their notes and mentions that the textbook is a lab manual, which may limit the resources available for solving the problem.

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Homework Statement



Electrical pulses travel at about half of light speed through coax cables. Determine the pulse delay time for a cable with a length of 20 feet.



Homework Equations





The Attempt at a Solution



I don't think this question is very hard, but I can't find any relevant information in my notes, and our book is just a lab manual. Thanks in advance.
 
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How are speed, distance traveled, and time related? (Don't think too hard about this.)
 
Well speed=distance/time. I could use the speed and distance to find the time. Is that all "pulse delay time" refers to?
 
Yes, that is all there is to it. :smile:

BTW, I have found that electric signals travel about 2/3 c along standard BNC coax cables. But of course, you should use the speed given in the problem statement.
 
Wow. Ok, thanks a lot.
 

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