Q:Please help, I'm stuck on this problem:An aluminum wire and a steel wire, each of length 4m, are hung from the ceiling. A 7 kg mass is suspended from the lower end of each wire. The aluminum wire has a diameter of 1.1 mm. What must be the diameter of the steel wire if it is to stretch the same distance as the aluminum wire, so that the two wires maintain equal lengths after masses are attached? Young's modulus for aluminum is .70 x 10^11 Pa and for steel it is 2.0 x 10^11 Pa.

The cross-sectional area of the steel wire must be (.70 x 10^11 / 2.0 x 10^11) of the aluminum wire. So the area of the Al wire is pi*(0.55mm)^2 = 9.50331778 × 10^-7 m^2 The area of the Steel wire must be 3.32616122 × 10^-7 m^2 now solve for the radius of the steel wire. A = pi*r^2 - r = 0.32538 mm d = 2*r = 0.65077 mm

Q:Looking for legit (good) speaker wire?or does it depend? are all speaker wire good?the speaker wires are for car audio

Here are also some quick notes on speaker cable use and selection Thick Diameter Wire - Has high capacitance (energy storage). Small Diameter Wire - Has low capacitance. Low capacitance is good for long cable runs. Large Gauge Wire - Have more bass and can travel longer distances with less distortion. Small Gauge Wire - Have high D.C. resistance resulting in poor dynamics. Short Cables - Short cables have less inductive and capacitive resistance than longer cables (good). All cables are directional. One way sounds better than the other. If the cable has arrows, make sure that you the arrows point towards signal flow. If they do not have arrows, you are best able to tell one channel at a time by listening to vocal music with brightness to the voice. The direction that sounds less edgier is correct. No matter which speaker cable you buy, you should try to buy equal lengths for each channel. This sometimes means that one speaker cable ends up longer than it needs to be. That's okay, as long as you don't coil the extra cable. A coiled wire is an electrical component called an inductor and it affects the sound of the signal passing through it.

Q:A wire is 1.5 m ong and has a diameter of 1.5 mm. The stretch modulus of the wire is 6.2 x 10^10 n/m^2. If a force of 400 N is applied to end of the wire, then the increase in length of wire is??please help, thanks

The stretching of wire by longitudinal force: If F force applied across the crosectional area A of wire of radius r and lenght L then the wire elaogates in the dirextion of force Stress P = F / A A = pi* r^2 = (1.5/2)*10^-3 = 7.5 *10^-4 m^2 strain produced = dL / L = increase in length / original L Young's modulus or elastic (stretch) modulus for the maretial, within elastic limits, Y = stress/strain strain = stress / Y dL = F * L / A * Y = F * L / pi (r^2) * Y dL = 400* 1.5 / 3.14 (7.5 *10^-4)^2 * 6.2*10^10) meter dL = 0.005479 * meter dL = 5.479 millimeters increase in length

Q:what wires are my speaker wires going to and coming from the factory amp and how do i hook them up please help i drive a 96' ford exploder

Chilton's guide in the library may have this information. Also, it is online with my library so you might be able to find this out at home.

Q:Hi, I've got two new appliances (range hood fan/light and bathroom exhaust fan). Both are installed but not wired. My house is older, build in 1940s and the previous appliances were wired using the existing copper wiring which runs through the house. I'd like to electrically install these new appliances but am concerned about connecting the new appliance wiring (aluminum wiring i think?) to the copper wiring in the house.Is it safe to pigtail these two wires together? Or is there a better, more safe method?Thanks

You might find a holy war of electricians on this topic but to simplify. It is not safe to connect copper to aluminum wiring when the aluminum is SOLID core. Many new fixtures come with a silver colored wiring that is STRANDED and these are connected to copper wires as general practice without any problems.

Q:I have 1971 slide in truck camper with 5 way pin wiring wires are red, white ,yellow, black,green.need to know what wire's do what...thanks

The wires are as follows: 1 = Trailer (battery 12+) wire (for trailer break-away battery) 2. white= ground 3.Green= right turn 4.yellow=left turn 5.Brown ( should not be black) is the tail lamp circuit ADDED: Ground on trailers are always white! And there is NO Black wire on a trailer harness! (if there is you will need to trace it out because someone put the wrong color wire in there!

Q:other than soldering and using a T-tap (wire tap), what are other common ways of connecting two wires together? Also, what does the following video say at the 1 minute 10 second mark? It's a something-set that helps to attach wires.

He has a crimp tool and various lugs that can be crimped. And that is another way to attach two wires, to crimp them together with the proper crimp tool and the proper (whatever it's called). .

Q:exact wiring

1995-96 Dodge Dakota Alarm, Remote Starter, Keyless Entry Wiring Information Constant 12V+ Pink/Black Ignition Switch Harness Starter Yellow Ignition Switch Harness Ignition Dark Blue Ignition Switch Harness Ignition 2 Black Ignition Switch Harness Accessory Black/Orange Ignition Switch Harness Tach Gray Coil Neutral Safety Wire Brown/Yellow Driver's Side of Trans. Brake Switch White or White/Tan Brake Switch Trunk Pin n/a Parking Lights Black/Yellow Light Switch Head Lamp Light Green Light Switch Hood Pin n/a Door Trigger Yellow (-) Driver's Pin Switch Door Lock Orange/Purple Driver's Kick Panel Door Unlock Pink/Purple Reverse Polarity Horn Wire Dark Green/Red (-) Fuse Panel Windows Up LF=Light Blue, RF=Brown/White Windows Down LF=White, RF=Purple/White

Q:ok got the mute wire figured out thanks to yahoo answers people..now i was wondering what the [ ILL] WIRE IS FOR ,ILLUMINATOR FOR SOMETHING?..also which wires on the speaker wires are pos and neg one is solid ,one is solid with stripe..not sure which is pos or neg thanks alot steve

first answer is correct, However, as long as you keep the solids and stripes consistent, it doesn't really matter if you hook them up negative stripe or positive stripe...just keep them all the same..

Q:how do I replace this, the wire is built into the speaker and runs into the unit.

If you have enough wire, just twist it back together and cover the open wiring with electrical tape. If he took out a chunk of wire, just buy some more speaker wire and do t he same thing. The wires should be red and black, just connect the red to the red and the black to the black. It's a really quick and easy fix you can do yourself.