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.
Homework Statement
The 2000 kg cable car shown in Figure P8.39 descends a 200 m high hill. In addition to its brakes, the cable car controls its speed by pulling an 1500 kg counterweight up the other side of the hill. The rolling friction of both the cable car and the counterweight are...
Homework Statement
The 2100kg cable car shown in the figure descends a 200-m-high hill. In addition to its brakes, the cable car controls its speed by pulling an 1840kg counterweight up the other side of the hill. The rolling friction of both the cable car and the counterweight are negligible...
A tow truck is connected to a 1500 kg car by a cable that makes a 23o angle to the horizontal. If the truck accelerates at 0.59 m/s2, what is the magnitude of the cable tension? Neglect friction and the mass of the cable.
i know that the car is accelerating at the same rate. my question...
Homework Statement
A 150 km long high-voltage transmission line 2.0 cm in diameter carries a steady current of 1030 A. If the conductor is copper with a free charge density of 8.9 1028 electrons per cubic meter, how many years does it take one electron to travel the full length of the cable...
Homework Statement
Suppose the moon were held in its orbit not by gravity but by the tension in a massless cable. You are given that the period of the moon's orbit is T = 27.3 days, the mean distance from the Earth to the moon is R = 3.85 x 10^8 m, and the mass of the moon is M = 7.35 x 10^22...
I'm having trouble finding what formula to use for this:
A tow truck is connected to a 1400 kg car by a cable that makes a 25 degree angle to the horizontal.
If the truck accelerates at 0.55 m/s^2, what is the magnitude of the cable tension? Neglect friction and the mass of the cable.
Homework Statement
Immediately outside a very long cylindrical wire of radius r1 = 1mm, the electric field is 40kV/m directed towards the wire's surface.
A hollow cylindrical metal tube with inner radius r2 = 3mm is now placed around the wire, to form a coaxial cable. What will be the charge...
[b]1. Compute the cable tension at the midpoint, the quarterpoint and support for a 1600 foot span with a sag at the midpoint of 100 feet, when the cable is loaded with 10 kips/foot spread uniformly along a horizontal line.
Midpoint Cable Tension=?
a)3200 pounds
b) 16000 pounds
c) 32,000...
Hi. I've been having trouble with 2 problems and I've worked them both 2 or 3 times. Here's my problems and my work. Any help will be greatly appreciated.
1.
Homework Statement
In San Francisco a very simple technique is used to turn around a cable car when it reaches the end of its...
I spent all day yesterday trying to find the answer to this without success. I know it must be out there, perhaps I just don't know the correct terminology to use in order to find it.
My question is this:
When I transfer data from one computer to another, the network card in the first...
Homework Statement
a coaxial cable carries current as follows: (see attachment)
at point P, 0.3 meters from the central axis, the magnetic field is 0.005 Teslas, what is current, I?
Homework Equations
magnetic field solenoid, B = mu_0(n)I where mu_) is constant = 4pi*10^-7, n is...
So here is the situation:
At a particular site a crew of electrical workers were putting some transmission cable in the ground. The cable was off loaded from behind a trencher machine (the cable is in a roll of around 2000 feet). Some short time less than 4 hours another crew came to put some...
The cable cars in San Francisco are pulled along their tracks by an underground steel cable that moves along at 9.5 mph. The cable is driven by large motors at a central power station and extends, via an intricate pulley arrangement, for several miles beneath the city streets. The length of a...
Hey guys,
I have a ti89 but I lost the USB cable that came with the calculator. I am trying to transfer some data to the calculator, but can I use any regular USB cable to do so? Thats what I read when I searched, but when I use the USB cable that came with my digital camera it says "TI 89...
hi~
i need to determine the tension a in the equation of the hanging cable y=acosh(x-h)/a+k with a known length and known location of end points. i figured out how to determine the horizontal translation h but i need a in order to do it and to have the complete equation.
this is for a...
Hi everybody,
I have a very simple question for programmers and automation professionals,
My friend told me that I can use the program National Instruments LabView as an Oscilloscope through the serial cable!
Is this true? and what are the limits of this advantage?
I'm using this...
Homework Statement
he cable of the 1,800 kg elevator cab in Fig. 8-51 snaps when the cab is at rest at the first floor, where the cab bottom is a distance d = 3.7 m above a cushioning spring whose spring constant is k = 0.15 MN/m. A safety device clamps the cab against guide rails so that a...
Homework Statement
If anyone could clarify this statement for me, I'm having a bit of difficulty interpreting what the heck I'm supposed to do:
"For a given potential difference V0 between the inner and outer conductors and for a given fixed value of b, determine the inner radius a for which...
We did a lab in physics class to determine the coefficient of static and sliding friction. basically we used a spring scale to determine how many Newtons of force was required to just get a block moving and then to keep it moving. We needed to do several trial runs with a slow, fast, and faster...
Torque--Sign hanging from a cable
Homework Statement
A 120cm-wide sign hangs from a 5.4 kg, 200cm-long pole. A cable of negligible mass supports the end of the rod as shown in the figure
What is the maximum mass of the sign if the maximum tension in the cable without breaking is 330N...
Homework Statement
In fig. 13-32, a 50.0 kg uniform square sign, 2.00 m on a side, is hung from a 3.00 m horizantal 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 hinged to the wall. (a) What is the...
Hi,
I am doing an experiment with a coaxial cable and i want to Count out it expected RC-constant for the cable.
I have measured the resistance for the cable, but when i count the RC, the resistansen that will be used only is the half of it resistans measured in the beginning.
Why...
Homework Statement
A uniform cable hanging over the edge of a tall building is 40 ft long and weighs 60 lb. How much work is required to pull 10 ft of the cable to the top?
Homework Equations
Density=3/2 ft/lb
The Attempt at a Solution
Ok, the problem is this: I can solve this...
cable problem
Hi,
I'm doing some self study on the subject of cables and I am curious about the reversed process of working out the linear mass density when given the shape of the cable (instead of the usual case of determining the shape of the cable given the density). The text I am...
I have a beam suspended by two cables with two weights suspended by the beam. The weight of the beam is negligible. How would I find the resting angles of the cables.
Homework Statement
The voltage V in a power cable varies sinusoidally with time t. At t = 1, the voltage is 12 volts. The voltage rises to its maximum level of 20 volts by t = 6. At t = 11, the voltage returns to 12 volts and then begins to fall. The minimum voltage is 4 volts.
Homework...
dear all
can anyone tell me..
if i have a transmission line passed above a metalic surface, there will be a parasitic capacitance between the line and the surface. and it induces interference how can i measure it.
and if there is any refrenece about the allowable induce voltage...
Homework Statement
There is a box that weighs 25N hanging by two cables. Both of the angles between the cables and the box on both opposite sides are 30 degrees. Find the tension in the cables. If the angles were changed to 5 degrees each how would the tension change.Homework Equations
The...
(Solved) Hanging Cable (Projectile Motion?)
Homework Statement
A perfectly flexible cable has length L. Initially, the cable is at rest, with a length x_0 of it hanging vertically over the edge of a table. Neglecting friction, compute the length hanging over the edge after a time t. Assume...
Homework Statement
A 36.0 kg uniform beam is attached to a wall with a hinge while its far end is supported by a cable such that the beam is horizontal.
http://a1.educog.com/res/msu/physicslib/msuphysicslib/24_Statics_Equilibrium/graphics/prob20_beamhinge2.gif
If the angle between the beam...
I have a locking device with a cable running through it (think of pieces of PVC pipe with a cable through them). I apply pressure and pull on one end of the cable tightening it and pulling the pieces together so I can lock it with a cam device. To lock it presently it requires 1200 psi...
A 700 kg elevator suspended by a cable accelerates upwards at 3 m/s^2. The force exerted by the cable on the elevator is?
(use g=10 m/s^2)
m=700 kg
a= 3.0 m/s^2
Fnet= 700 kg * 3.0 m/s^2
= 2,100.0 N Upward force
Fnet= 700 kg * 10 m/s^2
= 7,000.0 N Downward force...
An 8.9kg watermelon is placed at one end of a 6.1m, 238 N scaffolding supported by two cables. One supporting cable is at the opposite end of the scaffolding, and the other is 0.76 m from the watermelon. The acceleration of gravity is 9.8 m/s^2.
How much tension is in the cable at the end...
Homework Statement
An 88kg construction worker sits down 2.0 m from the end of a 1430 kg steel beam to eat his lunch. The cable supporting the beam is rated at 15,000 N. Should the worker be worried? To answer this, determine the tension in the cable.
Homework Equations
The...
Homework Statement
A freight elevator weighing 3000 pounds is supported by a 12 foot long cable that weighs 14 pounds per linear foot. Approximate the work required to lift the elevator 9 feet by winding the cable onto a winchHomework Equations
W = int(f)dyThe Attempt at a Solution
The work...
Pretty sure I got it right just going to ask you guys to make sure.
Homework Statement
An elevator with a mass of 1.10e3 accelerates upward at 0.45 m/s squared. What is the force acting on the elevator's support cable?
Homework Equations
F=ma
The Attempt at a Solution
The 9.8...
Hello. I'm new here and in need of some help.
I have a problem here in which two cables are supporting a weight of 631 N. The right-hand cable has a tension of 680 N and and makes an angle of 32 degrees with the ceiling. The left-hand cable has a tension of T and makes an angle of X at the...
The cable cars in San Francisco are pulled along their tracks by an underground steel cable that moves along at 9.5 mph. The cable is driven by large motors at a central power station and extends, via an intricate pulley arrangement, for several miles beneath the city streets. The length of a...
Homework Statement
A tugboat of mass m pulls a ship of mass M, accelerating it. Assume that water friction on the two vessels' is negligible.
If the force acting on the tug's propellar is F, what is the tension, T, in the cable connecting the two ships
(Variables: F, M, m)...
Hi,
As you know the capacitance per unit length of a standard coaxial cable is
C_{coax} = \frac{2 \pi \varepsilon_{0} \varepsilon_{r}}{\ln{\frac{b}{a}}}
where b is the radius of the cable and a is radius of the central conductor.
.
If we only want to know the capacitance of a...
Homework Statement
A 14 kg loudspeaker is suspended 2.0m below the ceiling by two 3.0m long cables that angle outward at equal angles. What is the tension in the cables?
Homework Equations
F=ma
The Attempt at a Solution
I drew the free body diagram, and I broke the tension of...
Homework Statement
The diagram below depicts a cross section of coaxial conductor with an inner wire of diameter and an outer conducting sheath of inside diameter , and some material placed in the space between the two wires. Suppose that you have a coaxial wire with di= 2.85 mm, do= 6.25...
Homework Statement
http://members.shaw.ca/code/2.133.JPG
Two Cables tied together at C are loaded as shown. Determine the range of values of Q for which the tension will not exceed 270N in either cable. Solve graphically and Numerically.
Homework Equations
law of cos, law of sine...
Homework Statement
A 235lb sign is supported from a wall by a cable inclined 37 degrees with the horizontal, and a brace perpendicular to the wall. Find the tension in the cable and the compression in the boom.
The answers are 390.5 and 311.9. But I have no idea how they got to those...
Homework Statement
"A coaxial cable consists of an inner wire and a concentric cylindrical outer conductor. If the conductors carry equal but opposite charges, show that there is no net charge on the outside of the outer conductor.
Homework Equations
Gauss's Law
The Attempt at a...
If net neutrality isn't enforced, and businesses are allowed to manipulate the pipes of the internet possibly allowing only a small number of websites who can afford the fee faster transmission, do you predict that The Internet will just be another version of cable or satelitte tv , where , just...
Assume a weight hanging vertically in a strong, thin and inelastic long cable which is fixed in the top end. The top end cable is then released. When will the mass at the bottom part of the cable start moving downwards??
a) Immediately. In this case information is transferred faster than...
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...