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:Steel wire or iron wire. spool of wire used mainly in the iron frame of the building foundation..

Steel wires have high strength than the usual reinforcement bars and usually it is used for prestress or post tension beams which can span very big spans without mid supports, especially good for bridges railways bridges and flyovers.

Q:2.4) A wire has a resistance of 19.2 . It is melted down, and from the same volume of metal a new wire is made that is 5 times longer than the original wire. What is the resistance of the new wire?

.4) A wire has a resistance of 19.2 . It is melted down, and from the same volume of metal a new wire is made that is 5 times longer than the original wire. What is the resistance of the new wire? Resistance = ρ * (L ÷ A) ρ = resistivity L = length A = cross sectional area L * A = volume of wire. The volume is constant L1 * A1 = L2 * A2 It is melted down, and from the same volume of metal a new wire is made that is 5 times longer than the original wire. Since the length is 5 times longer, the area is 1/5th of the original volume Resistance2 = ρ * (5L ÷ 0.2A) = ρ * 25 * L/A The new resistance is 25 times the original resistance = 25 * 19.2 = 96 Ω

Q:Ok, I am having trouble installing a new car radio in my 97' Honda Civic Lx. It's just a basic pioneer cd player.. I matched all the colored wires up and still nothing. My brother had told me something about + - for example do i hook the green stripped wire with a flat green wire? Vice versa.. Help please.. Also If you know of a web site with diagrams?

This Site Might Help You. RE: Honda Civic cd player installation, wiring... HELP!? Ok, I am having trouble installing a new car radio in my 97' Honda Civic Lx. It's just a basic pioneer cd player.. I matched all the colored wires up and still nothing. My brother had told me something about + - for example do i hook the green stripped wire with a flat green wire? Vice...

Q:hiI got a car radio quot;Grundig WKC 3680to stick to my car, I don't understand is the difference between : 12 VOLT BATTERY WIRE and 12 VOLT IGNITION WIRE, which one to use? I got only one cable bringing the current from my Renault 4 car!thanx

check to see if that power lead from your car has power with the ignition off if it does that will be your memory wire and you will need to run another wire from your fuse block on an accsesory that is controlled by the ignition switch for the cd player to be able to turn on and off with the car its not a very hard job once you figure out the starting point

Q:One wire has part of the plastic coating on the end, the other wire does not.

the lead is the wires showing. lead wire can also mean attaching a wire and feed it through a wall attach other end to the wire and pull it through. Now if you need both ends to have wire showing take a utility knife firmly place wire on block of wood and lightly cut through the caseing. thats the thick wire that en cases the other wires and peal back and then cut it off. then carefully hold blade of utility knife and wire aganst your thumb on a 45 degrees away from you and pull that will strip the plastic off the wires hope that answers your question dave

Q:What is the difference between carbon fiber and wire heating?

Carbon fiber heat is not transmitted through the medium, but far infrared light radiation to the human body, the heat transfer directly to the human body tissues and organs

Q:when checking white wire at the box it is cold when checking at the light switch it has power i am confused

The white is the neutral and has no power in it from the breaker box. When you check it at the light or switch you are getting power back through the light bulb.

Q:I got the Rem wire down connected it to cd deck.But what does Rem stand for and what does it do?Remote Wire? what the hell it do where it run off?

The blue and white wire on the back of car stereos is not a remote wire, it is the antenna wire for power antennas. Which does not require 12 volts to power on the antenna motor. The remote wire is the same thing as the REM wire, REM is short for remote. This wire is used to send a 12 volt signal to external amplifiers to turn them on when the stereo is turned on.

Q:THERMOSTAT WIRING

Connect the red wire to the R terminal on the t-stat, connect the white wire to the W terminal, connect the green wire to the G terminal and connect the blue wire to the Y terminal on the t-stat. The B terminal is not used on most thermostats. Unfortunately most manufacturers of thermostat wire do not make 4-wire with a yellow wire and instead make it with a blue wire, that is why they don't match up perfectly. The red wire provides 24v power from the furnace, the white wire controls the call for heat from the t-stat, the green wire controls the fan, and the blue wire/yellow terminal controls the air conditioner.