Q:Two steel wires are stretched with the same tension. The first wire has a diameter of 6.00E-4 m and the second wire has a diameter of 8.90E-4 m. If the speed of waves traveling along the first wire is 53.2 m/s, what is the speed of waves traveling along the second wire?

Wave velocity v = √(T/μ) Same tension in both wires: T1 = T2 μ is the linear mass density v1 = 53.2 m/s v2 = ? = v1/v2 = √(T1/μ1) / √(T2/μ2) = √(T1μ2 / T2μ1) = √(T1/T2 * μ2/μ1) = √(μ2/μ1) Linear mass density is mass/length, mass is density*volume: m/L = ρV/L = ρAL/L = ρA = ρπr^2 Both wires are steel so their density is the same. == v1/v2 = √(μ2/μ1) = √(ρπr2^2 / ρπr1^2) = √(r2^2 / r1^2) = r2/r1 == v2 = v1r1/r2 = (53.2*3.00×10^-4) / 4.45×10^-4 = 35.9 m/s ---- Speed of waves along the second wire is 35.9 m/s

Q:Ceiling fan has a black wire, white wire, green wire and also a black and white wire.

The white wire from the fan gets connected to the white wire (neutral) in the ceiling box. The green wire is ground. It is connected to the fan mounting bar where the bare copper wire is connected. The remaining two wires are your hot wires. One goes to the fan and the other goes to the lights so you can run the lights on a dimmer circuit. I believe the black is for the fan and the black-white is for the lights. Your fan's instruction manual should identify these wires. IMPORTANT: Never run the fan motor on a standard dimmer. A dimmer is designed for use with resistive loads like incandescent, halogen, and (to some degree) LED lamps only. Running an inductive load like a fan motor will create noise spikes on your electrical circuit and possibly overheat the motor causing premature failure.

Q:The outlet box has 2 black wires capped together, 2 white wires capped together, 2 bare wires capped together, and a single red wire. The light fixture I want to install is a two bulb fixture that has 2 black wires, 2 white wires, and 1 bare wire.

It is obvious from the question that you have zero knowledge of wiring. While this is an extremely basic thing to do, I think it is better to get a professional so you and your house will be safe. Electricity is too dangerous to do without even the most basic understanding of safe procedures and standards. You will get people telling you how easy this is, but I would rather have you safe than try this your self.

Q:when we connect the amp wire to the car battery we first remove the negative side then connect the amp wire to the negative side and reconnect the negative battery wire thing. is this correct?

Amp Wire

Q:What type of wire do i need to install a normal inside wall outlet? Do i have to use solid copper wire?

Buy AWG # 14X2 cable inside includes one more bare copper wire for grounding. Solid single conductor is the common product.

Q:I know there must be a difference, and reason why some wires have a solid strand behind the rubber, or some have several strands. can someone explain to me how it works and the differences in wire. m trying to get my head into electricity. resources would be good too.

you ask a fairly broad question first, the larger the wire, the more current it can handle as far as stranded wire, it flexes more during use and vibration and heating, etc. the solid wire is the smallest size and most accurate diameter if that is important such as high frequency

Q:So earlier my passenger low beam wouldn't turn on. i went and bought a circuit tester and found out a wire located here _-_ lt;=== (the bottom right plug on the socket) that wire wont light up. i bought a socket at the same time, but i dont know how to replace it. and even if i did.. i don't see how that would fix the wire.It's possible the wire is fine. but i cleaned the socket and all that and still nothing.any advice would be great. i really need to drive at night1994 GMC jimmy

The wire that leads to your socket may be worn or damaged. Find out which wire is not working. Use a meter that has a sharp probe, so you can stab the wire with the probe and see if it is putting out the electricity, up the wire from where you put the socket on. If the wire is not working, but off the part of the wire that is not working and splice in a new piece of wire and attach to the socket. Hopefully this will help you.

Q:is there a way to wire an exit sign to a plug for an outlet receptacle?

First off, Aurthur A's answer is composed of several NEC violations; he may be going to electrical hell, if he doesn't shape up. Second, you did not say if this is a required exit sign. If it is, then you will need a licensed electrical contractor to install it; as most jurisdictions will not allow work in anything but the owner's principle dwelling to be done by unlicensed personel.

Q:electrical wire prices

It's merely a coincidence.. The price of OIL and the price of COPPER have been in flux for years... Precisely why in america they want to get rid of the penny... it will soon cost more than a penny to make them. Just imagine if they were solid copper like the old wheat backs.