Q:A wire has a resistance of 21.0 ohms. It is melted down, and from the same volume of metal a new wire is made that is three times longer than the original wire. What is the resistance of the new wire?

The resistance of the new wire is (in terms of its length, area resistivity); R2 = pL2/A2 And the resistance of the original wire is; R1 = pL1/A1 The ratio is;(resistivity will cancel because its the same for both situations) R2/R1 = L2A1/L1A2 given L2 = 3L1 R2/R1 = 3A1/A2 To find the new cross-sectional area ,require the volumes to be equal; L2A2 = L1A1 3L1A2 = L1A1 A2 = (1/3)A1 Sub this into the R2/R1 equation to get; R2/R1 = 9 R2 = 9R1 = (9)(21) = 189 ohms

Q:The output part of wire plastic and part of wire broken, and the connection lost sometimes, some taps used to wrap up but the connection is still not good.How to fix it permanently?

Only try to fix it if it is on the lptop side, DON't play with A/C power unless you're qualified. If it is on the safe voltage side you could cut the wire, strip back the wires about 1cm, and twist them together, then solder the wires. Before you join them slide a small piece of heatshrink over one side of it, then after joining and soldering the wires wrap a small amount of electrical tape around the bare wires then slide the heatshrink over it all and heat it up to enclose it all, Fixed ! If you need help with it let me know. Cheers,

Q:Wire diagram for stereo to a 2000 Kia sportage

you have a bad ground not he deck its self!? try to follow the wires and check them but if not anything outta place? try to get a car audio tech to check it

Q:I recently got a new dishwasher. My hubby and I are in the middle of installing, and are to the point of hooking it back up to the electricity. The cord that we have has 2 black wires, one is smooth the other ribbed, then on the dishwasher, we have a black, white, and green(ground). Which wires do I hook up to which?(cord) black smooth black ribbed (dishwasher)blackwhitegreen(ground)

DONT HOOK IT BACK UP The cord you have is the wrong cord It is missing the ground and it sounds like it is the wrong size wire Sounds like you have a lampcord Where does the cord come from ? A box in the wall? From the floor?

Q:I dont' know if quot;a wiremeans phone call, or whatever the original sentene from the story is as follows:quot;Because I had a wire from Hilton Cubittthis morning.quot;

Wire is as obsolete a word as telegram or cable, which is what wire stands for.

Q:Which is live and which is not, there is a black wire and a blue wire?

The oven is rated at 220 volts they are both hot conductors.

Q:What is a tubeless wire and how does it work?

It is a wire without a tube. It works properly, it has a larger section than the usual wires, but is cheaper (Al is cheaper than Cu).

Q:I removed a dishwasher and now the wires are exposed. I turned off the circuit to that outlet. I am planning on waiting a while to replace the dishwasher. I want to turn the circuit back on so I can use the other outlets, but don't want to leave the wires exposed. Any ideas?

There are little caps that twist on to wires for just that purpose. Go to any hardware store and explain the problem. they will give you what you need and tell you just how to use them. Once capped, you can use the other outlets with no danger. Duct tape will work temporarily, if you wrap each one separately and make sure they don*t touch each other.

Q:If I have wired my 20 amp kitchen receptacles with 12/2 wire which only has a red, black, and ground wire, do I use the red wire for a neutral and the black as a hot?

that is notably unusual. commonly, the twine used is #12/2 NM-B for abode wiring. yet whilst it is already put in, that is likely to be to no longer basic to alter it now. yet in no way concern the NEC is here! The national electric Code demands the impartial to be white. you are able to purely re-% out the purple conductor with a decrease priced roll of white electric tape. The Code demands the comprehensive conductor on the container to be re-pointed out. Or a sequence of three (3) stripes on the conductor. So use the black on your 'warm', and re-% out the purple with white tape on your impartial.

Q:How can I make a wire dress form?

Make Wire Dress Form