Copper Definition and 497 Threads

I am working on impedance measurements of close-wound electromagnetic coils. I am using an Agilent LCR meter to measure the impedance of these coils over a frequency range of 20Hz-2MHz. When I perform the measurements, I get impedance magnitude and phase angle in degrees. I would like to...

Please watch this video (link: http://www.youtube.com/watch?v=JN-A3RryOC8) for reference. As you can see, the magnet does not slow down (at least, not appreciably) when falling through the copper coiled around a PVC pipe, and I can't figure out why.

Hey there, inspired by this exhibit in the SF exploratorium, I was discussing with my colleague what might happen if you put a thick piece of pure copper (say, a 5kg ingot) in the bore of a 3.4 T MRI machine. (What about 7T?) We have the MRI machine, all we need is a big piece of copper...

Hi there, I'll try my best to be descriptive. I'm looking for as much information as possible on the limits on current technologies in producing copper circuitry. I had a nice conversation the other day with a member of my research group and he was telling me about the demand for the ability...

Homework Statement Two metal rods, one silver and the other copper, are both immersed at one end in a steam chamber at a temperature of 100°C. The other end of each one is in an ice water bath at 0°C. The rods are 5.0 cm long and have a square cross-section that is 2.0 cm on a side. No heat is...

Homework Statement We insert into a copper container (weighing 1.5 Kg) 3 Kg of water vapour at 100 ºC. Inside the container there are 10 Kg of ice at -10ºC. Find the ΔT when the system reaches the equilibrium. Known data: the specific heats of water, copper and ice and the latent heat of...

I've recently read that the electrons move relatively slowly to what I had previously thought through a metal. That the "drift velocity" is slow, but because the electrons are plentiful, they can pass down the signal very fast. Near light speeds. Could someone explain what I'm missing and this...

^{62}Cu is 61.932586 amu. I would like to know how many exposed nuclei are in 1.0 gram of ^{62}Cu. I have two calculations below, hopefully one of them is correct... Method 1. 1.0 gram ^{62}Cu x \frac{1 kg}{1000 g} x \frac{1 amu}{1.660566 x 10^{-27}kg} x \frac{1 mole ^{62}Cu}{61.932586...

What would be the best method for heating copper tubing via nichrome wire? Voltage is 10

How to find ampacity of 1/2" by 4" copper buss bar I have a question about finding ampacity of buss bar. I have a 1/2" by 4" copper buss bar and the only formula I can find in the NEC is 1000/in^2 but when I use this formula I come up with 500 amps and I'm being told that 1/2" by 4" copper bus...

Why the electrical purification of copper involves both an oxidation and a reduction process.

Homework Statement I am looking at an example problem in the text and they skipped some steps. I think I am missing somthing obvious but none-the-less I don't know what is going on. We have a long copper rod o radius R which carries a uniformly distributed (free) current I. Find H, the...

I have been carring out an experiment in which I have to measure the hall voltage in two samples given to me, which are Bismuth and Copper. The Hall voltage values of Bismuth come out as expected but when I measure hall voltage in the copper sample, I do not get any changes in the hall voltage...

Hi so I am aware that when copper is introduced to a magnetic field it will generate it's own that repels the field inducing it, this repulsive force is weak but how strong of a magnetic field would it take to generate a considerable amount of force on the copper

hi all; actually i have done an experiment using die sinking EDM using one copper electrode and three different work piece material copper aluminum and stainless steel to perform a comparative study in term of MRR, TWR and surface roughness. i used ( pulse current 8, 12, 16, 20 and 24 Am... the...

If electrons flow on the surface of a wire, why isn't copper coated aluminum wire used in electrical applications instead of solid copper wire? It would be more cost effective

Hello, i'm doing my prep for my lab experiment tomorrow and have a few questions about the experiment. The schematic is attached. My lab script says the following; 2 questions. It says the precise rate of flow of water through the heat exchanger is unnecessary to know. Is this...

Could someone please illustrate the difference among the following terms? 1. Enameled round copper conductor. 2. Synthetic enameled round copper conductor. 3. Supper enameled round copper conductor. Thanks in advance.

I was reading an article about the electron orbitals of iron and copper: The electronic configuration of iron is 1s 2, 2s 2, 2p 6, 3s 2, 3p 6, 4s 2, 3d 6 And that of copper is 1s 2, 2s 2, 2p 6, 3s 2, 3p 6, 4s 1, 3d 10 Iron has an incompletely filled d orbital while copper has a full...

Cu(NO3)2(aq) + 2 NaOH(aq) → Cu(OH)2(s) + 2 NaNO3(aq) This is a chemical reaction I'll be doing soon for my chemistry lab. And I was wondering, since the product is blue, and as is the reactant, how can I tell I've used up all the cupric nitrate and it has all reacted? Note: and the NaNO3...

I was thinking of plating iron or magnesium on to copper with a galvanic cell. Would this work? 3Cu(s) + 2Fe2+(aq) --> 3Cu2+(aq) + 2Fe(s) Cu(s) + Mg2+(aq) --> Cu2+(aq) + Mg(s) In the cathode, when the Cu turns into Cu2+ and makes Cu(OH)2, of what use is it? And in the anode, when the O2-...

% copper in post-1982 pennies Homework Statement The total mass of each penny is 2.500g, the density of copper is 8.96g/ml, the density of zinc is 7.14g/ml and the mass of a penny if it was 100% copper would be 3.11g. Homework Equations The Attempt at a Solution I am not too...

Homework Statement The figure below shows a long, hollow copper pipe. The inner radius of the pipe is a and the outer radius is b. A uniform current I flows in the walls of the pipe. You may assume that the permeability of copper is the same as free space, that is, ##\mu_0##. Use the...

How do you figure out which way is north when you're lost and the only things you've got with you is a copper wire and a voltmeter? Thanks in advance.

Hey I am about to start a research paper on the physics concepts involved in relation to fibre optic cabling and copper cabling. In my report I have to discuss how the physics in both relate and differ from one another. In terms of fibre optic cabling I have decided to talk about snell's law...

Homework Statement A number 12 copper wire has a diameter of 2.053mm. Calculate the resistance of a 31m long piece of such wire. Use rho=1.72x10-8 Ohm-m for the resistivity of copper. Homework Equations This is the part that I am unsure of, all of my equations for resistivity do not...

talking to someone about direct tv systems, how they talk between HD boxes over the rg6 coax line one person said one part sends a signal and it travels down the center of the center coax conductor and another signal going the other way travels down the outer part of the conductor, the surface...

Homework Statement Your data center has 100,000 CPUs. Each burns 100 W at 120 V. Copper has a resistivity of 1.7E-8 Ω*m. What is the maximum length of copper wire on the power supply to give a voltage drop of no more than 1V? Homework Equations P = V*I R = (rho*L)/A, where L is the...

Hello. Assume an electron gun, as in CRT, made of plumbing copper instead of glass. Using magnetic scanning coils to move electron beam. Will the displacements of this beam be linear as if tube material was made of glass ? PS : this is not an exercise by though but a real problem I encounter in...

Seems to me in that an antenna is carrying microamps at most that slightly higher resistance of steel Vs copper wouldn't matter. What's the fault of this logic??

Hi everyone Homework Statement I want to make a powder diffractogram of copper. Where do I expect the first five intensity maximums when the used wavelength is lambda=0,711 *10^-10 m Homework Equations Bragg equation 2d sin(omega)=m*lambda The Attempt at a Solution I...

Magnet dropped down a copper tube experiment (magnetic braking?) Homework Statement Experiment: what is the effect of the # of magnets on the time of drop through the pipe? Magnets are placed in a paper cylinder container - "one magnet" is 1 magnet and 5 weights (mass of 1 magnet and 1...

Homework Statement A copper rod is 40.0cm long at 22.0 Celsius. If the rod is heated to 100.0 Celsius, what is it's increase in length.Homework Equations Linear expansion of copper is 16.8*10^-6The Attempt at a Solution Change in Length= (length)(change in temp.)(α) So...

I was looking at this page and it explains the heat capacity difference between copper and water in terms of a difference in potential energy change as the molecules are heated. What does that mean? I know water has polar bonding so is it due to the water molecules having much stronger...

Homework Statement A Copper wire has a shape given by a radius that increases as R(x)= aex+ b. Its initial radius is .45 mm and final radius is 9.67 mm and its horizontal length is 38 cm. Find its resistance. Homework Equations R = pL/A where p = resistivity of copper A = ∏r2 L = length of...

If I were to take a copper wire and shove it into the positive terminal of an electrical outlet and then stick the other side of the copper wire into the earth, will current flow??

Hello All, I am drawing up a design for a water-cooled exhaust manifold for a small engine. It would be a simple design of an exhaust exit pipe mounted to a flange, with a tubular copper heat exchanger liquid filled coil wrapped around the exit pipe right near the cylinder. The copper would...

Homework Statement Hey! We have a copper pipe, which has a outer diameter y = 4.1 mm and inner diameter x = 4.0 mm Length of the pipe is L = 120m and resistivity of copper is ρ = 1.7 * 10^{-8}\Omega Homework Equations Resistance is R = ρ * \frac{L}{A} The Attempt at a...

A cylinder is constructed from a super insulator. The dimensions of the cylinder are Length L: 1 M; inside diameter i.d.: 12 mm. The entire Length of the cylinder contains copper (cases described below). Heat (T > 100C) is continuously applied to the copper on one end of the cylinder...

Homework Statement a) What is the current contained in the cylindrical shell of wire defined by R/2<r<R? b) What is the total current running through the wire? c) Given your answer to (b) what potential difference V must be applied between the ends of the wire? Homework Equations...

How many grams of copper are required to make a hollow spherical shell having an inner radius of 5.70 cm and an outer radius of 5.75 cm? The density of copper is 8.92 g/cm^3. Ok, so, how do I find the height? Or solve the problem without the height?

Homework Statement I'm a complete chemistry novice, just on chapter 1 of my book here. I am tasked with writing down the electron configuration of Copper, atom number 29. Homework Equations I've got my orbital chart here. 29 electrons to fill in. The Attempt at a Solution...

Hey there PF, I'm trying to determine the reaction equation for a little home experiment I've been conducting. The setup is very minimal: copper metal in a solution of 3% H2O2 and 5% CH3COOH. In reality, I'm probably missing something fairly straightforward. The reaction occurs very...

Hi everyone, I am trying to find the mean free time between collisions for free electrons in a copper wire given the dimensions of the wire and the resistance, electron density and temperature. I figured I needed to find the conductivity, plug that into an expression for mean free path...

For the classic Lenz law demonstration using a neo. magnet dropped down a copper pipe, is the magnetic force generated correlated to the thickness of the copper pipe? Ergo, will the magnet go slower down a thick copper pipe vs. a standard size plumber pipe?

Homework Statement An insulated copper block receives energy at a rate of 100 W from an embedded resistor. If the block has a volume of 10-3m3 and an initial temperature of 20°C, how long would it take, in minutes, for the temperature to reach 60°C? Homework Equations Copper specific...

I was wondering what voltage or current, if any, would be produced if the basic magnet through a copper coil experiment had the poles rotated 90 degress so north and south faced the top/bottom of the coil rather than the entry/exit points? The attached image has a basic illustration of this...

Can someone please help me on this physics question The mass of a copper atom is 2.50 10-25 kg, and the density of copper is 8 920 kg/m3 . (a) Determine the number of atoms in 1 cm3 of copper. (b) Visualize the one cubic centimeter as formed by stacking up identical cubes, with one...

i need to dissolve a copper nail completely what chemical can do that and how much time is enough to form the reaction , i thought about sulphuric acid as a reactant but i don;t know if it dissolve it completely or partially !

Homework Statement Use approximations to find the number of free electrons in a 4mm diameter solid sphere of copper. What fraction of its electrons have to be removed to leave a sphere with a charge of +50μC? Note that density of 29_Cu is 8.96 g/cm^3 and molar mass 63.54g/mol Hint: Atomic...