Cables Definition and 169 Threads

Homework Statement In the figure below, the left-hand cable has a Tension T1 and makes an angle of 58° with the horizontal. The right-hand cable has a Tension T3 and makes an angle θ3 with the horizontal. A 97.6N weight is on the left and an 84N weight is on the right. The cable connecting the...

Homework Statement The cross section of a long coaxial cable is shown in the figure, with radii as given. The linear charge density on the inner conductor is -80 nC/m and the linear charge density on the outer conductor is -10 nC/m. The inner and outer cylindrical surfaces are respectively...

Does anyone know of some good references regarding how fiber optics are effected while aging in the field? What determines the life span of a fiber installation? Specifically, what causes the signal quality to degrade, and how quickly does it degrade. (That is, how does the attenuation across...

The diagram I've attached shows a cross-section view of a very long straight metal cylinder of radius r1 within a coaxial hollow metal cylinder of inner radius r2 and outer radius r3. The inner cylinder has a positive charge per unit length λ, whereas the outer cylinder has negative charge per...

Homework Statement A 5m long uniform beam AC with mass of 600kg is being lifted from the ring at B by two chains (AB, 3m long and CB, 4m long). Determine the tension in chain AB and CB when the beam is clear of the ground. Homework Equations The Attempt at a Solution I tried...

I live on a hill at 700 feet and I can see the aircraft warning lights of Belmont TV transmitter at 1 100 feet which is 55 miles away with my naked eye. With a small pair of binoculars I can see the mast which is tubular steel. In the morning I can sometimes see the several sets of cables...

Homework Statement A 30 kg neon sign is suspended by two cables, as shown. Three neighborhood cats (5.0 kg each) find the sign a comfortable place. Calculate the tension in each cable when the cats are in the positions shown...

Homework Statement Two cables are tied together at C and loaded as shown. Determine the range of values of P for which both cables remain taut. Homework Equations \Sigma F_x=0 \Sigma F_y=0The Attempt at a Solution \Sigma F_x=\frac{ 4 }{ 5 }*P-\frac{ 600 }{ 650 }*T_{AC}=0 \Sigma F_y=\frac{ 250...

Homework Statement A 500 N crate is at position A = (45, 70, -115) in a standard xyz coordinate system. Three cables support the crate and have terminal points B, C, D, whose coordinates are (0, 70, 0), (-60, 0, 0), and (45, -65, 0). Calculate the tension force of EACH of the three cables...

Homework Statement two very long coaxial cylinders. Inner has radius a and is solid with charge per unit length of λ. Volume is also uniform but not defined by a parameter. Outer is hollow with inner radius b and outer radius c. Outer cylinder is a conductor with charge per unit length of -2λ...

Hello, I am using a lock-in amplifier to measure the AC voltage across a small sample of superconducting wire located in a cryostat. As the self-inductance and the capacitance of the wires used for the measurement are non-negligible, I have basically connected the lock-in amplifier in series...

Hello, I am studying transformers now for the exam and I came across this question. It made a confusion in my mind. I took the photo of the question and put it into attachment. The answers B and C looks very similar to each other and in my humble opinion both of them are true. I would be...

Hello I have a very basic question. I'm studying power cable engineering right now and I've learned about the role of insulation in a cable to reduce dielectric losses and charging current losses, but I don't understand what this means exactly. Here are my questions.. 1. Is the insulation...

Hi All, I am working as an electrical engineer (graduate) for a UK company company in the engineering industry. Since year review is coming up, it would be good if I’d talk to the management about training. I want to get certified in design and development of HV MV LV power cables. Hence, I...

Homework Statement What's the tension on each cable ? and the power required to overcome tension (?) Here's the diagram: http://en.wikipedia.org/wiki/File:Planincline-schema.JPG Homework Equations F=Vsin(theta) ( constant velocity ) = a= 0 Inclined (24.25 degrees) to the...

I'm looking at getting one of these for my tablet but would a female to female USB adapter on the end of the USB lead that came with my tablet work the same? Thanks

Homework Statement The big sign below (see attached image) is 13 kg and the small sign is 4 kg. Find the tension in all 4 cables. Homework Equations Fnet= Fa +FbThe Attempt at a Solution ƩFx= T2cos38 - T1cos51=0 T2=T1cos51/cos38 ƩFy=T1sin51 + (T1cos51/cos38)sin38 - 127.4 -39.2 = 0 T1=131.303

Hey, I'm looking for a robust connection to microcontroller pins, just wondering what everyone has found works best? Cheers

Hi All, Consider a situation in which a coaxial cable have electric current i(t) = Imax * cos(w*t) flowing through its cilindrical inner cylindrical core (with radius a) and the inverse current flowing on its surface cover (with radius b). I would like to know if it is correct to say that...

Homework Statement We have a person pulling on a string or rope in the negative y negative x quadrant (call it left) this person is called Wesson, they have a force of 300N at 30° Same situation but pulling the other way, positive y and positive x quadrant (call it right), this person is...

Homework Statement LOOK AT ATTACHED IMAGE FOR DIAGRAM OF QUESTION Assuming the pulley at D to be frictionless, determine the force values in cable members AC and BC due to the 300 N weight force for the system depicted in Fig. 3. Homework Equations F=ma (or F=mg) Sin cos and tan...

Homework Statement Determine the tensions in cables AB, AC, and AD. Homework Equations The Attempt at a Solution I mad point A (0,0,0) B = (2.6, -4.2, 4.4) C = (-2.6, -1.6, 4.4) D = (0, 2.5, 4.4) Firstly I found the unit vectos of AB, AC and AD, which are as follows...

Homework Statement Consider there is a 634 N weight held by two cables that meet at a point above the weight. The left cable with tension T sub 2 makes an angle of 46° to the horizontal. The right cable with tension T sub 1 makes an angle of 40° to the horizontal. a) What is the tension in...

a hevy piece of macinery(85kg) is being moved by elevator between floors in a building. Two identical small cranes are used. a cable connects each 'crane' to a mounting hook on the top of the piece of equipment. the cable from one crane is at an angle of 22degrees below the horizontal while the...

Hi everyone, i came across this forum a while ago and have been lurking here for a while. Any ways, i have a simple problem but can't seem to find a solution to it the photo of the problem is the link just here http://i1053.photobucket.com/albums/s463/Popa911/1cc85138.jpg Homework...

While doing some "what is the tension in cable" of hanging masses problems, I thought of the following scenario: a mass, uniform in density, is suspended by two cables of unequal length (See attachment) Assuming that the mass is uniform in density, would T1 be the same as T2? Intuitively, it...

would commodity usb cables and ports survive an over-standard voltage and current?? suppose we want to make an adapter to power a gadget that require more voltage and power than what is allowed by the USB standard. But, suppose we try to use off-the-shelf USB cable in the above-standard...

I hope this is the right area of this.. Guys, I need to know... what does a Punchdown block do? I see these in wiring closets, where the telephone or ethernet cable is flayed open, and the wires inside are stuck into the blades of the block. I'm studying for the Network+ exams, and they mention...

A load taking 18.2A is supplied by aluminum and copper cables connected in parallel. The lengths of the copper and aluminium cables are 78m and 64m respectively. The diameter of the aluminium 1.8mm and that of the copper 2.1mm . The resistivity abd copper is 0.018uOHMm (Ohm.meter) and 0.031uOHMm...

I am trying to find the differences between electric cables designed for High voltage, medium voltage and low voltage electric transport, but I am failing to find an answer. I was wondering if you could help me with this. I know that aluminum is almost always the metal of choice, thicker is...

Homework Statement α=30° β=45° m=10kg a=0 Tα=unknown Tβ=unknown THE ANSWERS SHOULD BE Ta=72N, Tβ=88N Homework Equations mg=10kg*9.8m/s2=98N ∑Fx=ma(x)=0 ∑Fy=ma(y)=0 A Free Body Diagram would show three forces: 98N facing downwards, Ta facing 30° up and to the left, and Tb...

Hey everyone, I could do with a hand checking my understanding of calculating the current loss in cables just to make sure I am doing it right. First up, is power loss. From my understanding of ohms law and P=VI it is possible to calculate the power loss in cables by using the formula power...

I want to drill a 3/8" hole in one side (not through) of a steel tube, 1-3/16" OD 1/16" wall tube in order to run cables through it. The tube is my son's go kart frame so I want to make sure it is safe to drill a hole into it. I'd appreciate any comments.

I have a laptop and I want to run my laptop screen and two external monitors. Can I do this with just a vga splitter and cables?

Homework Statement An object of mass m is suspended from a cable tied to two other cables, each fastened to a supporting beam, as shown below. The tensions in the three supporting cables are T1, T2, and T3. The diagram of the system is available via the link below...

Homework Statement A 4.98-kg block is placed on top of a 11.4-kg block that rests on a frictionless table. The coefficient of static friction between the two blocks is 0.500. What is the maximum horizontal force that can be applied before the 4.98-kg block begins to slip relative to the...

Hello guys , i have a question related to cable mechanical properties you know power cables have armouring , which enhance the mechanical properties for the cable the question is : what is the difference between the Tape armour and wire armour i know the difference in how they look like...

Homework Statement A mining company use an electric pump with and operating voltage in the range 1.25kV - 1.5kV. There is only a 240 Vrms supply available. A transformer is used to step up the output voltage to 1.5 kVrms. The secondary winding of the transformer has 2000 turns of wire. The...

Homework Statement Three masses are suspended by cables as shown. Find the tension in each cable. Picture: Homework Equations W=mg The Attempt at a Solution T1: W= mg = 15 kg x (9.8 m/s^2) = 147 N T2: W= mg = 11kg x (9.8m/s^2) = 107.8...

Homework Statement In treating spinal injuries, it is often necessary to provide some tension along the spinal column to stretch the backbone. One device for doing this is the Stryker frame, illustrated in part (a) of the figure. A weight is attached to the patient (sometimes around a neck...

Homework Statement A weight of 5000 N is suspended by two cables. The object is at rest. The first cable is horizontal and the second makes an angle of 143 ° with the first cable. Find the tension of the first cable. Homework Equations Erm...I know it's something with sin or cosin...

Just out of interest I was wondering and couldn't work out... Why are (even high-end) speaker cables not coaxial? We always use a coaxial cable in the lab to get rid of the noise on our measurements. I figure that 50/75 ohm standard coax would create an impedance mismatch with the typically...

I was carrying out a insulation resistance test on a ring main circuit at the dist board in an industrial workshop. The majority of the wiring is single core pvc cables run in metallic trunking and conduit. The majority of circuits have no cpc as the trunking/conduit is being used. When I...

Hello. I just came to imagine a "thing" that I'm not able to understand correctly, so maybe you can help me. Imagine a high voltage source, and a circuit made of cable capable of handle high currents (with low resistivity) and a load with medium to high resistance (say 10 KOhm) Now you...

Hi I have a practical problem/question: I need to wire 2 PLC-s for communications (RS485 signal) and I am planning to use shielded twisted pair cable (Cat5 FTP). The signal cables are quite short - approx. 6 m. One possible problem that could arise: between the 2 PLC-s, there is a...

having 2 cables of 790 mm^2 cross sectional area and voltage of 450 kV. the maximum power is 700 MW and the length of cables 580 km. Assuming the resistivity of the conductor is 1.67microohmcm. then what is the ohmic lose? Thanks in advance

I think I solved this problem correctly, I just want to check because it's an interesting problem, and it's from a past exam. Homework Statement A coaxial cable consists of an inner solid conductor of radius r_1, and and outer conducting cylindrical shell of inner radius r_2 and outer...

[SIZE="3"]Please help PROBLEM Cable AB supports a load distributed uniformly along the horizontal as shown. The lowest portion of the cable is located at a distance a = 3.6m below support A, and support B is located a distance b = na above A. -> Determine the maximum tension in the cable as...

Hey guys, I'm having trouble analyzing the picture created in this and answering it. I believe it forms a triangle with angles 37, 60, and 83? Are the x components for both sides the same? Are the y components of both sides the same? If anybody has step by step details on how this solve this...

Homework Statement A coaxial cable is made from concentric cylindrical conductors. The radius of the inner conductor is a and the outer comductor has inner radius b and outer radius d. Calculate the self inductance per unit length of the cable. You may assume that (b-a) >> a and (b-a) >>...