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swat32
3 years ago
14

Two technicians are discussing shielded cable. Technician A says that shielded wires are generally twisted in pairs to cancel th

e effect of electromagnetic interference. Technician B says that shielded cable can be replaced with regular straight wire once the vehicle is out of warranty. Who is correct?
Computers and Technology
1 answer:
Black_prince [1.1K]3 years ago
3 0

Technician A is Correct. So this is actually a question I just had come up in my IT-140 Networking Fundamentals class but as a matter of fact I also know this because I've worked as a Network Technician for many years now both as a salaried employee and as an Independent Contractor. The reason Technician A is correct is because, indeed Wires in a Shielded Twisted-Pair (STP) cable or even Unshielded Twisted-Pair (UTP) cable are intentionally made this way for two reasons: the expressed purpose of actually twisting the wires in the first place is to protect them from interference called "EMI" (as stated in the question, Electromagnetic Interference!), however they are also twisted this way because of a similar interference (and in most cases, classified as the same kind of disturbance) called RFI or Radio Frequency Interference. As a technician, one of my jobs was hanging Access points in ceilings, and a requirement of that particular job was to make sure that these cables (which in this case were Cat6 which is short for Category 6, the exact cable that is referred to in the question, because Category 6 cable is shielded) were not to be left laying on the ceiling tiles in the drop ceilings! The reason being is, the light fixtures have electricity running through them, and anything with electricity running to it gives off Electromagnetic Interference. So, again Technician A is correct but... I have to say this as a side note... it would be <em>completely</em> pointless and utterly time consuming to remove these cables and replace them with a straight wire <u>just</u> because the warranty expired on a vehicle. Besides... Straight Though Wire and Twisted Pair are used for two completely different things.

Hope this helps! If you'd like to fact check me, google "emi interference"

CJ

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Answer:

In C:

#include <stdio.h>

int main(){

   float length, width, depth,poolvolume,watervolume,charges;

   printf("Length (feet) : ");    scanf("%f",&length);

   printf("Width (feet) : ");    scanf("%f",&width);

   printf("Depth (feet) : ");    scanf("%f",&depth);

   poolvolume = length * width* depth;

   watervolume = length * width* (12 * depth - 3)/12;

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   printf("Invoice");

   printf("\nVolume of the pool: %.2f",poolvolume);

   printf("\nAmount of the water needed: %.2f",watervolume);

   printf("\nCost: $%.2f",charges);

   printf("\nLength: %.2f",length);

   printf("\nWidth: %.2f",width);

   printf("\nDepth: %.2f",depth);

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   return 0;}

Explanation:

This declares the pool dimensions, the pool volume, the water volume and the charges as float    

float length, width, depth,poolvolume,watervolume,charges;

This gets input for length

   printf("Length (feet) : ");    scanf("%f",&length);

This gets input for width

   printf("Width (feet) : ");    scanf("%f",&width);

This gets input for depth

   printf("Depth (feet) : ");    scanf("%f",&depth);

This calculates the pool volume

   poolvolume = length * width* depth;

This calculates the amount of water needed

   watervolume = length * width* (12 * depth - 3)/12;

This calculates the charges

   charges = 100 + 0.77 * watervolume;

This prints the heading Invoice

printf("Invoice");

This prints the volume of the pool

   printf("\nVolume of the pool: %.2f",poolvolume);

This prints the amount of water needed

   printf("\nAmount of the water needed: %.2f",watervolume);

This prints the total charges

   printf("\nCost: $%.2f",charges);

This prints the inputted length

   printf("\nLength: %.2f",length);

This prints the inputted width

   printf("\nWidth: %.2f",width);

This prints the inputted depth

   printf("\nDepth: %.2f",depth);

This prints the name of the programmer

   printf("\nMr. Royal [Replace with your name] ");

   return 0;}

<em>See attachment for program in text file</em>

Download txt
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