Cable Definition and 629 Threads

A cable layer or cable ship is a deep-sea vessel designed and used to lay underwater cables for telecommunications, electric power transmission, military, or other purposes. Cable ships are distinguished by large cable sheaves for guiding cable over bow or stern or both. Bow sheaves, some very large, were characteristic of all cable ships in the past, but newer ships are tending toward having stern sheaves only, as seen in the photo of CS Cable Innovator at the Port of Astoria on this page. The names of cable ships are often preceded by "C.S." as in CS Long Lines.The first transatlantic telegraph cable was laid by cable layers in 1857–58. It briefly enabled telecommunication between Europe and North America before misuse resulted in failure of the line. In 1866 the SS Great Eastern successfully laid two transatlantic cables, securing future communication between the continents.

View More On Wikipedia.org
Recent contents Top users
  1. B

    How Is Cable Deflection Modeled Under Uniform Wind Loads?

    Anyone has come across the problem of a cable deflection (static) under the effects of wind? Iam looking into the problem of the deflection of the electric contact wire of a train (the wire above the train from which it extracts electric energy) under the effects of side winds and I wonder how...
  2. K

    How Is Tension Calculated in a Submerged Object's Lifting Cable?

    Homework Statement A seagoing crane lifts a sealed safe from a sunken ship. The average density of the safe is 5.3 grams/cc and its mass is 120 kg. What is the tension in the lifting cable when the safe is still submerged? Homework Equations Pressure = density *gravity* height*...
  3. B

    Calculate Voltage Drop of Underground Cable | XLPE Cable Table 13.8 kV

    Hello guys, If form example I am given the sequence impedance of a cable ( positive, negative, zero) Will I use all of these impedances to calculate the voltage drop of the cable? or only the positive impedance? Anyone here knows where can I find table of xlpe cable (various sizes) for...
  4. C

    Is the Electric Field Equation for a Coaxial Cable Correct?

    Homework Statement GIVEN: a=radius of inner electrode = 0.05 cm b=radius of outer electrode = 0.5 cm Vo = 130 V QUESTION: What is the electric field at surface of the inner electrode in units of V/m? Homework Equations Given equations Potential at radius r b/w inner&outer electrodes...
  5. C

    Heat Transfer of a Cable and Air

    I'm in need of an equation that relates the loss of heat (in power) of a cable to ambient air to various parameters such as diameter, temperatures of air and cable, and all other variable that may play a role. My research online has produced some results, but I haven't quite found what I'm...
  6. S

    HOw to find tension in cable supports

    As shown in the picture there is no force applied over the cable.The self weight of cable is 313.9N(32KG) .And there is a sag of 250mm in the middle .I need to find the tension in the supports. The length of the complete cable is 11.31m .We r not give the length between two supports. If you...
  7. A

    Displacement of a cable in tension

    I have been stumped by this problem... If you have a vertial cable under tension of say 800N and you apply a horizontal tension at its mid point (node A), how can you calculate the horizontal deflection U of node A?? Can't wait to solve this! A
  8. rootX

    Work Done by Tension in Cable: More Than Gravity?

    This questions asks what is the work done by the tension in the cable. And, the book answered that it is equal to the work done by the gravity. But shouldn't it be more than the work done by the gravity? (because there is also a horizontal displacement) see the attached image
  9. J

    How to Maximize Inductance in a Coaxial Cable?

    hiya guys, I'm having a large amount of trouble with a problem that I've been working through (currently revising for an uncoming exam in electromagnetism, along with a lot of other things). the problem is stated as follows (condensed): coaxial cable - inner cylinder radius a, out cylinder...
  10. M

    Find the Difference in Tension: Steel Cable & 20kg Block

    Homework Statement A massive steel cable drags a 20.0 kg block across a horizontal, frictionless surface. A 90.0 N force applied to the cable causes the block to reach a speed of 3.60 m/s in 2.40 s. What is the difference in tension between the two ends of the cable? Homework Equations F=ma...
  11. K

    What Is the Tension in the Support Cable?

    Tension in support cable. Help! A wrecking ball (weight = 4500 N) is supported by a boom, which may be assumed to be uniform and has a weight of 3610 N. As the drawing shows, a support cable runs from the top of the boom to the tractor. The angle between the support cable and the horizontal is...
  12. M

    What is the weight of a cable hanging between two poles?

    Homework Statement A cable hangs between two poles of equal height and 39 feet apart. At a point on the ground directly under the cable and x feet from the point on the ground halfway between the poles the height of the cable in feet is h(x)=10 +(0.4)( x^{1.5}) The cable weighs 12.5...
  13. S

    Unbalanced Tensions in Cable Geometry: A Scientific Inquiry

    http://img185.imageshack.us/img185/8830/cablesyv1.gif You're looking at the design for my recent lab we did. Now, you would think, given the geometry of the loadings (i.e. post heights, eye bolt height, weight heights, distances from a specified origin) that the x components of the tension...
  14. A

    Coaxial Cable Impedance: Why Length Doesn't Affect It | Explained with Model

    Why is the coaxial cable impedance independent of it's length? I am considering the model shown in the attached picture. Since the resistance, capacitance and inductance are all dependent of the length of the cable in one way or another how come the impedance is not? I also can't find any...
  15. K

    Vector potential in a coaxial cable

    Homework Statement I have to find the magnetic vector potential in a round coaxial cable. The internal conductor has a finite (known) conductivity. The external conductor is a perfect electrical conductor. Both the radius of the internal and the external conductors are known. I have to assume...
  16. Z

    Cable friction and tension problem

    Read please example 2 of http://cnx.org/content/m14060/latest/ . P1 P2 On picture 2 there are those two tension labeled by T which are equal. Why equal? And shouldn't they exert just torque? I know we are considering the pulley to be massless, so no torques. So is it correct to...
  17. B

    Calculate Tension in Cable for 225 kg Square Sign Hanging from 3.00 m Rod

    A 225 kg uniform square sign, 2.00 m on a side, is hung from a 3.00 m rod of negligible mass. A cable is attached to the end of the rod and to a point on the wall 4.00 m above the point where the rod is fixed to the wall. What is the tension in the cable? I know I need to use: sum of Fx sum...
  18. L

    Beam hinged to wall with a cable (torque, etc)

    Hi. I've tried to answer this questions four times and so far none of my answers have been correct. Any help is greatly appreciated! A uniform 48 kg (m) beam at an angle of 24 degrees (theta) with respect to the horizontal has length of 38 m (L). It is supported by a pin and horizontal cable...
  19. D

    Getting Online in a Basement Suite: Do I Need a Cable Modem?

    I'm living in a basement suite. The landlords upstairs have internet through cable and told me I'd also have it, but all I have is the outlet where a TV type of cable would normally go. Can I just buy a cable modem from a store, or do I have to get it through a cable company? Do I have to...
  20. B

    Calculating Length of a Cable Between Poles

    A cable hangs between two poles of equal height and 37 feet apart. At a point on the ground directly under the cable and x feet from the point on the ground halfway between the poles the height of the cable in feet is h(x)=10 +(0.4)( x^{1.5}) The cable weighs 15.1 pounds per linear foot...
  21. F

    Solving Tension on Cable Problem - Get the Answer Here

    Hi I have a homework problem I can't understand: A 125-N sign is supported by a lightweight pole and cable as shown in the diagram. What is the tension in the cable? the diagram resembles |> the | is a wall, the top of > is the cable and the bottom is the pole, and the sign hangs from...
  22. A

    How Do You Calculate Tension in a Cable and Determine Mass with Given Variables?

    1.the mass and acceleration is given and asks for tension in cable. What is a formula i could use. 2.in another question initial speed, air resistance, time and speed is given, what is a formula i could use for this question to solve for mass.
  23. B

    How much work was done by the tension in the cable?

    I think I have been staring at this question too long as I can not figure it out. I am sure the answer is simple: A 1500-kg elevator moves upward with a constant speed through a vertical distance of 25m. How much work was done by the tension in the cable? I know that W= (F cos 0)s, and...
  24. C

    What is the Tension in the Left Cable Holding a 2000 Pound Block at 30 Degrees?

    I can't figure this out for the life of me . A large, 2000 pound block is being held by two ropes that were attached to a horizontal beam. The rope on the left made a 30 degree angle, the rope on the right made a 40 degree angle (see image). What is the tension in the left cable? HINT...
  25. S

    How Is the Tension Calculated in the Main Cable Supporting a Piano?

    A 500 kg piano is being lowered into position by a crane while two people steady it with ropes pulling to the sides. Bob's rope pulls to the left, 15 degrees below horizontal, with 500 N of tension. Ellen's rope pulls toward the right, 25 degrees below horizontal. What is the tension in the...
  26. BobG

    Lightning Strike Damage: TVs, Cable Modem & VCR

    We had a thunderstorm Thursday evening and I think my house got zapped by lightening. I lost two TV's, a VCR, and my cable modem. Of course, the good news is that the cheaper the TV, the less damage it sustained. The best TV doesn't turn on at all, while the picture only fills half the screen...
  27. W

    Solving Power Cable Question - Part (b)

    Hello, I solved the first part of this problem, but I am a little stuck with finding the second part, which deals with power. "A skier of mass 70.0 kg is pulled up a slope by a motor-driven cable. (a) How much work is required to pull him a distance of 60.0 m up a 30 degree slope (assumed...
  28. H

    Troubleshooting Pocket PC Sync Cable Issues

    I bought a new sync cable for pocket pc 10 minutes ago, and automatically pluged it into see whether it works. When I already did, I couldn't take out the cable. It has like a fork to stiffly hold in incase someone disconnects the cable inciddently, and one 'fork' (thing to hold in) failed to...
  29. C

    Can Network Cable Transmission Speeds Be Independently Controlled?

    I was wondering if there is a schematic or if anyone knows of a way to delay the send and/or the receive of a network cable. Preferable separate circuits. For example can I control how fast people on my network receive but not control the send. May be in the wrong place but i really need help...
  30. J

    Medical Could an Unshielded EEG Cable Corrupt Signals?

    Hi I have just received a high density electrocap for recording eeg -signals and discovered that the cable that leads to the electrodes is not shielded. Does this probably corrupt the signal?
  31. B

    Cable modem so im always connected to the internet

    anyone on here use msn I have have a cable modem so I am always connected to the internet ... however when a program like msn is running does it amke it easier for my computer to become infected with a virus
  32. B

    Calculating Tension in Steel Cable with Masses & Forces

    "If two masses are attached by a steel cable and each mass has a force pulling on it, write an expression for the Tension is the cable as a function of the two masses and the two forces. Assume one of the forces is constant, but the other force changes.
  33. 6

    DVI Cable Pinout: End to End Info

    Anyone know the pinout on a DVI cable...does it cross over or is it straight through? Does pin 1 on one end connect to pin 1 on the other end?
  34. L

    Dependent motion - cable (rope) velocity

    Hi, fellows ! In an arrangement of 2 slinding blocks connected by a cable (rope). I can state the blocks position and their velocity as a consequence. On the other hand, i can't figure out the cable velocity...which concept should I apply for ? VB=18in/s > (Info) VA= 27 in/s > (found)...
  35. C

    Cable Passing Through Metal: What Is It?

    Hi, My camera USB cable has this cylindrical container close to the end where the USB connects to the camera. When I opened it up, the cable was going through two holes in the metal. The metal wasn't perfectly black, and it wasn't smooth. What is that piece of metal for? I don't know much...
  36. wolram

    Solving 3ph Cable Issues with Inverter Driven Motor

    We have an inverter driven 3kw motor at work that is the main drive for a piece of kit we have, it drives via a 300-1 or so gear box, you can turn the whole thing with one finger via the fan on the motor, the problem is the 3ph cable to the motor hardens an breaks down, it is the recomended...
  37. F

    Could My Cable Internet Speed Drop Be Due to Faulty Hardware?

    My cable internet has been going at less than 56K speeds for the past 3 days. I called my ISP which is bright house for central florida roadrunner service, and the technician said that everything looks fine. Last week my speed according to broadbandreports.com was 4400 kbps, now it takes 5...
  38. P

    Electric field of coax cable problem

    A coaxial cable has a charged inner conductor, with charge 8.3 \mu C and radius 2.917 mm, and a surrounding oppositely charged conductor, with charge -8.3 \mu C and radius 5.997 mm. Assume the region between the conductors is air and neglect end effects. The length of the cable is 60 m. What...
  39. G

    Unlimited Energy From a Single Cable?

    This is crazy, but bear with me. Let's say the next mission to the Moon brings a cable. One that's still attached to Earth. They anchor it on the lunar surface. As the bodies move in relation to each other, the cable is tugged by the Moon's incredible mass through a station on Earth that uses...
  40. honestrosewater

    Is Tipping Your Cable Technician Expected?

    URGENT: Do I tip the cable guy? Seriously. I'm stupid and didn't think about it. He's here right now, so I'd like to know. Actually, I'll probably tip him anyway, but I'm curious now. He was on time and very nice. He's pretty cute too. :wink:
  41. Cyrus

    Cable System Step Function Analysis

    Cable System - Step Function Hi, I want to do an experiment using two dissimilar ropes in my basement and see if I can produce some results using a rope analysis. Here’s the set up. I want to tie a light rope to a heavy rope, and be able to characterize the curvature the system takes on. I...
  42. E

    Cox wants me to upgrade: Cable Modem

    I have a Pcx2200 Cable modem by Toshiba.. and according to Cox.. this is just not cutting it anymore... ? ... I did not have service for a month.. and now that I come back they come up with this? What router do you have and does it work with cox high speed [cable] internet? BTW: Anyone...
  43. Cyrus

    Can we accurately predict the shape of a cable system with multiple unknowns?

    I am studying the statics of cable systems and I find it to be very interesting. :approve: I REALLY like statics. :biggrin: Such an interesting subject, anyways. My first question is this: When we have a system of cables supporting weights, say like traffic lights, we can assume the cables...
  44. S

    Movement of Center of Mass for a Pulled Down Cable

    Hello A cable is attached at two (nonemoving)fixpoints. Now the cables midpoint is pulled downward, thereby destroying the catenary curve. Question: How will the cables center of mass (CM) move: op, down or stay fixed? My thoughts: I find it intuituitive that the CM will assume the...
  45. M

    How to find the Tension in a support cable?

    A wrecking ball (weight = 5910 N) is supported by a boom, which may be assumed to be uniform and has a weight of 2820 N. As the drawing shows, a support cable runs from the top of the boom to the tractor. The angle between the support cable and the horizontal is 32°, and the angle between the...
  46. S

    Cantilever Cable: PhD Student Researching Deformation Out-of-Plane

    Hello, I am a PhD student in textiles. I was wondering whether anyone has any experience with cables and stuff. For my PhD, I have implemented a Cosserat model for these one dimensional structures as described by the equations of motion given in this article. Ofcourse one tries to validate their...
  47. V

    Power due to the force applied to the block by the cable?

    A 2600 kg block of granite is pulled up an incline which is 36.87 degrees off of the horizontal at a constant speed of 1.07m/s by a cable and winch. The coefficient of kinetic friction between the block and the incline is 0.25. What is the power due to the force applied to the block by the...
  48. S

    Elevator pulled upward by cable - find tension

    here's the question, An elevator cab is pulled upward by a cable. The cab and its single occupant have a combined mass of 2000kg. When that occupant drops a coin, its acceleration relative to the cab is 8.00m/s^2 downward. What is the tension in the cable? could someone explane to me...
  49. A

    Determine the tension in the cable attached to the chair

    A "swing" ride at a carnival consists of chairs that are swung in a circle by 12.0 m cables attached to a vertical rotating pole, as the drawing shows. ( = 70.0°) Suppose the total mass of a chair and its occupant is 200 kg (a) Determine the tension in the cable attached to the chair. (b)...
  50. D

    How to Calculate Tension in Cable for Stopping a Moving Truck

    Hello, I'm having trouble trying to calculate the tension in a cable when dealing with constant velocity and no acccel. For example. A block moving with constant velocity tied to a wire that is connected to a fixed wall. When the slack in the wire ends the blocks comes to an...
Back
Top