What is Cables: Definition and 172 Discussions

Networking cables are networking hardware used to connect one network device to other network devices or to connect two or more computers to share printers, scanners etc. Different types of network cables, such as coaxial cable, optical fiber cable, and twisted pair cables, are used depending on the network's physical layer, topology, and size. The devices can be separated by a few meters (e.g. via Ethernet) or nearly unlimited distances (e.g. via the interconnections of the Internet).
There are several technologies used for network connections. Patch cables are used for short distances in offices and wiring closets. Electrical connections using twisted pair or coaxial cable are used within a building. Optical fiber cable is used for long distances or for applications requiring high bandwidth or electrical isolation. Many installations use structured cabling practices to improve reliability and maintainability. In some home and industrial applications power lines are used as network cabling.

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  1. K

    3D Equilibrium with cables (statics)

    Homework Statement Diagram is attached. The mast OA is supported by 3 cables. If cable AB is subjected to a tension of 500N, determine the tension in cables AC and AD and the vertical force F which the mast exerts along its axis on the collar at A. a = 6m b = 3m c = 6m d = 3m e = 2m f = 1.5m...
  2. S

    How to calculate power loss in transmission cables?

    Power station generates 120kW Electricity can be transmitted either at 240V or at 24000V using a step-up transformer. The cables have total resistance of 0.4W What is the power loss when voltage is transmitted at: 1) 240V 2) 24000V I AM SURE YOU CAN WORK THIS OUT USING I...
  3. P

    A Loudspeaker is suspended by Cables

    SOLVED Homework Statement A 18 kg loudspeaker is suspended 1.6 m below the ceiling by two 3.0 m long cables that angle outward at equal angles. What is the tension in the cables? N Homework Equations F= ma The Attempt at a Solution I believe that I have the drawing correct...
  4. V

    Electormagnitics Quests relating coaxil cables and other

    Hey Guys i have tried to attempt some of these questions i just don't understand where to start from i need the main formulas that can help me do these questions thanks alot a) coaxial line consists of an inner conductor of radius RA = 1 cm and outer conductor with an internal radius of RB =...
  5. C

    High Frequency Signals & BNC Cables: Explained

    Hihi, I don't understand what is the meaning that BNC cable transfer high frequency signal? For example, I use BNC cable for the connection between my diode controller to the diode laser. I also use BNC cable to connect my photodiode to the oscilloscope. I'm not sure what is the...
  6. J

    How Do You Calculate Tension in Angled Cables?

    [SOLVED] Tension in two cables Homework Statement 21.0 kg loudspeaker is suspended 2.40 m below the ceiling by two 3.90 m long cables that angle outward at equal angles. The attempt at a solution So my homework comes from the MasteryingPhysics online homework. What I first start out with is...
  7. E

    Solving Tension Force in Plank Supported by Cables

    Homework Statement A strong plank 8.0 m long and having a negligible mass is supported by steel cables from both ends. A jaguar with a weight of 800 N stands 2.0 m from one end. What is the tension force in the cable farthest from the jaguar? a. 120 N b. 200 N c. 240 N d...
  8. robphy

    James Randi Offers $1M Award for Proof of Expensive Speaker Cables

    Slashdot is reporting "James Randi Posts $1M Award On Speaker Cables" http://science.slashdot.org/science/07/10/04/1354224.shtml http://www.randi.org/jr/2007-09/092807reply.html#i4 http://gizmodo.com/gadgets/speaker-cables/7250-speaker-cables-turn-you-into-a-dancin-fool-302478.php...
  9. S

    Calculate Tension in Cables to Support Cantilever Beam

    hello everybody i have a problem of how I can determine the tesion in three cables required to support a cantilever beam have a distributed load of 302 kg/m
  10. S

    Parabolic Cables: Info for Grad Thesis

    i need some information about parabolic cables (links,books,equations etc.) for my graduation thesis. Thanks
  11. M

    Boom held by 3 cables (Statics)

    Homework Statement I've included a picture of the problem so you can see the diagram too. The question is asking for the tension of 1 cable, when 2 are given (problem# 41).Homework Equations no equations per se.The Attempt at a Solution I resolved cable AC and cable AD, but don't know how to...
  12. S

    Conductors and co-axial cables?

    Conductors and co-axial cables!?? Say you have a long conducting hollow cylinder with some surface charge density \rho which is inside another hollow (uncharged) cylinder. What would the electric field be outside the outer cylinder? I am guessing that the e-field outside the outer cylinder...
  13. B

    What are the tensions in the cables for a 750lb weight at the origin?

    Homework Statement Ok, I've got three cables all pointing in a downward direction towards the orgin. They all connect at the orgin, onto a 750lb weight. Determine the tensions in A,B,C. I'm going to put these into (x,y,z) form, so you get the picture. A = (4,-2,5) B = (-3,-3,6)...
  14. P

    Find the forces exerted by the two cables

    I'd appreciate help with this problem as I don't know how to start it: A beam with a mass of 1500 kg and a length of 2.0 m hangs from two cables, such that it makes an angle of 65degrees with the vertical. Both of the cables are completely vertical; one is attached at the lower end of the...
  15. C

    Magnitude of force exerted by cables on a tower

    Given the tower is 70 m high, and the force of FAB= 2 kN and the x and z components of the vector sum of the forces exerted on the tower by the 3 cables are zero. I have found the lengths of all 3 cables. I have also found the unit vectors for all 3 cables. I just do not know how to find the...
  16. R

    Calculating the Tension in Steel I-Beam Cables

    The steel I-beam in the drawing has a weight of 8.90 kN and is being lifted at a constant velocity. What is the tension in each cable attached to its ends? (picture attached) for this problem do i need to first convert kN to N?...and I am just not sure where to start...
  17. dduardo

    Where to Buy 10-Pin Female Flat Ribbon Cables [ooooo]

    Does anyone know where I can get a few 10-pin female flat ribbon cables. They look like this: http://hubbard.engr.scu.edu/embedded/lcd/lfh8p4032b/P1010029.JPG The header looks like this: [ooooo] [ooooo]
  18. Cyrus

    Statics of Ropes and Cables

    First, on an unrelated note, I would like to share an anwser I think I found to be correct on a question I posted here a while back. I asked about how a smooth collar that was Not Pinned could prevent a moment. The problem I was faceing was the fact that in order to have "play" so that the...
  19. P

    Solving Tension Problem with 3 Cables | Philip

    I'm a bit stuck on a tension problem, I have a weight supported by three cables. I will have to admit, up to this point, I have been cheating on these tension problems. What I have been doing is writing various equations and using my TI-89 to solve the system of equations. This method has been...
  20. D

    Ethernet cables draws current?

    It is the second occurence. In the morning, when i turn on my computer, i figure out that it has around 4-6% battery powe missing. At night, only the ethernet cable (and usb mouse, but i eleminated it as a suspect for the power theft :cool: ) is plugged in. So could be that the thief here is...
  21. B

    Solving a Weighty Problem: Calculating Tension in Steel I-Beam Cables

    Hello again, I'm stuck on a new problem. Again, I thought I had the correct equation but apparently not as my answer is not correct. Here's the problem: A steel I-beam has a weight of 9.10 N and is being lifted at a constant velocity. What is the tension in each cable attached to its ends...
  22. D

    Power Cables Info: Amperage, Current, Wattage & More

    Greetings ! I was searching for this on the web for a couple of days and found practicly nothing. This is highly unfortunate because it means that not only did I not get the info I wanted but I'm also lousy when it comes to such searches (and I was actually of the opposite opinion prior...
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