Copper Definition and 497 Threads

heat transfer from welded copper piece Hello everybody, I am designing a machine where i have a welded copper piece which i have to cool it from 800 c to 100 c i m using normal flow water.please guide me how much water , flow rate, and pressure do i need.I have maximum 40 sec to bring it...

Homework Statement Oxides of copper include CuO and Cu2O. In a crucible, you heat 1.51 g of one of these copper oxides in the absence of air and obtain 1.21 g of pure Cu. Which oxide did you have? Homework Equations The Attempt at a Solution I am really quite uncertain regarding...

Hi I've been searching on the web for this two topics, band structure and fermi surface, both of copper. I can't find any of them from a free source, I am doing just a report of my class of introduction to solid state and I just have found this two things in articles that must be bought. If...

Hey guys, Im designing a system where water flows through a copper tube or coil where it is heated and sprayed out the other end. My question is, how does the length of the tube/coil play a role in this heat transfer problem? What I would like to do is pass the water through the inlet at a...

Wow. Can anyone please tell me how to approach this problem? For a science experiment you need to electroplate zinc onto both sides of a very thin, 1.00 1.00 copper sheet. You want the zinc thickness to be 140 , and you know that the charge carriers in the ionic solution are divalent...

Homework Statement A long, solid, copper rod has a circular cross-section of diameter 10.0 cm. The rod has a current of 5.0 A, uniformly distributed across its cross-section. Calculate the magnetic field strength at: a) the centre of the rod b) 2.5 cm from the centre c) 5.0 cm from the...

Homework Equations I was given all this information... I cannot figure it out whatsoever. I would post my attempts but there were too many. Any ideas would be helpful. I know the answer is 5.09 as the half life Decay Constant of Copper 66 Sources do not emit radiation at a constant...

The purpose of this chemistry lab was to prepare/synthesize Bis(2,4-pentanedionato) Copper (II), which is also known as Cu(C5H7O2)2 I was given the following format for a chemical equation in a lab that needs to be balanced: Cu2+ (aq) + 2 base-n (aq) + 2 C5H8O2 (aq) → Cu(C5H7O2)2 (s) + 2...

Homework Statement An ideal gas, and a block of copper, have equal volume of 0.5m^3 at 300K and atmospheric pressure. The pressure on both is increased reversibly and isothermally to 5atm. Find the work done of each if the compressibility of copper is 0.7X10^-6 atm-1 the atmospheric...

3 CuCl2 + 2Al + HCL →2 AlCl3 + HCL + 3Cu I'm think it's Copper II Chloride because the Copper is a solid, but the solubility rules with the Cl would suggest otherwise. What would be the precipitate here? One other would the net ionic equation have no reaction, since the ions cancel on both...

Homework Statement So here is the Problem : I am Modelling an interesting problem for a project i am busy with. I need to find out the force exerted on a single busbar in a 3 phase system, with each phase carrying 3300A. This is mainly so that i can deduce what size of busbar supports i...

Homework Statement A copper calorimeter can with mass 0.466kg contains 00950kg of ice. The system is initially at 0.0C. If 0.0350kg of steam at 100C and 1atm pressure is added to the can, what is the final temperature of the calorimeter can and its contents? Homework Equations Q=mL Q=mcΔT...

I have a very weird assignment/project. The link http://www.cns.cornell.edu/documents/JeffKashIBMTJWatsonResearchCenter.pdf" has an eye diagram in pg4 of the slide. That eye diagram has been constructed using copper wired interconnect for chip to chip communication. Now, I have no idea what is...

As i know, the metallic structure for example a pure copper metal which is made up of all metal atoms that is the copper atoms actually have all its atom of metallic element bonded together by metallic bonding. Metallic bonding is the electrostatic force of attraction between the positively...

Homework Statement How much heat is required to raise the temperature of a 50 gram cube of copper from 20 degrees Celsius to 45 degrees Celsius? (in kcal and J) Specific Heat(20degrees Celsius) for Copper (kcal/kg x degrees Celsius) is 0.092. and the Specific Heat for Copper (J/kg x degrees...

Suppose that you have a sheet of copper that carries a surface charge of \sigma on each face. The electric field just outside of each face can be calculated by plane symmetry and the solution would take the form E=\frac{\sigma}{2\epsilon_{0}}\hat{n} correct? If not I have to go back and...

why does copper show 2 valancies??

Hi, Im not an electrical engineer, not even close to one, but I have been asked to design a terminal for a motor. I have the power (current and voltage) requirements so I need to work out what area of copper in the terminal will handle this power. Can anyone give me the equation, or point...

I came home from a vacation to find my computer conpletely dead, I am assuming it's lightning from major storms that rocked south ontario last week. I have noticed that I have deposits of copper sulfate on my copper heat sink and cpu cooler made by zalman. I am wondering what would cause...

Electroplated a 5 micron layer of copper a few days ago. Was wondering why there's sulphuric acid in the solution.

what happens when a permanent magnet is wound with a copper wire (inductor) and the inductor is connected to some volatge? Will the magnetic flux of the permanent magnet increase (i.e., make the permanent magnet more strong)?

Hi, I have attached a Di-electric study graph of Copper. a) How can I do the di-electric measurement from this graph? b) How can I measure the loss of di-electric? c) How can I measure the di-electric constant? d) The graph gives the result which is linear. Is it essential that the...

Hii , i am new in this forum . I am in class 10th and my name is Sankalp . I have a question : Can you tell me why copper is better conductor of heat than iron ??

Homework Statement For a final task, I need to determine a procedure to extract pure copper (Cu(s)) from a mixture of CuSO4 pentahydrate and NaCl. The Attempt at a Solution Well, I honestly don't know where to begin. I think I would need to dissovle the micture in water to separate the...

Homework Statement If 7.3 lbs of copper at 12540 deg. F. is added to .52 ft^3 of water at 35 deg. F. in an insulated container, find the equilibrium temperature. Homework Equations I Think I need to use: delta Q= c*m(Temp. final - Temp. original) c.c. = .092 BTU/lb (specific heat...

Good day. just want to ask anyone about copper loss. How is it computed for example in a manufacturing plant or in a dept mall.Could anyone give an illustration/example? Also , is it true that copper loss can be reduced by using big wires?What if the wire is big enough? thank you. hope...

Homework Statement Determine the actual shape of a copper bar in contact with a furnace at a constant 200 C at one end and a constant ice bank at 0 C at the other end. Diameter of the rod is 2.54 cm. Length is .5 meters. Thermal conductivity of copper is 380 J / (smC) Homework...

Homework Statement A copper wire of diameter 2.00mm carries a current of 0.50A.The number of conducting electrons per metre cube of copper is 8.00 x 10^28. a)Calculate the drift velocity of the conducting electrons. b)What is the number of conducting electrons in 10.0cm length of the wire...

Is copper absorbs Carbon? I've just seen in one Science Fair project. In that there was one project. it was about pollution. There was a model of sizing machine. The boy who made this project says " If we use Copper in Sizing boilers, Copper will absorb much quantity of Carbon from air". My...

Hi everyone, I'm working on a project where the processor is attached to a copper tape about 8cm long where it sticks from 1 end of the processor case to the other while remaining length was insulated with a cardboard. the other end was slightly exposed for temperature measurement The...

Hi All I have a question regarding what type of chemical/solution that is recommended to dissolve solidified Copper(I) chloride around a ceramic coated sample. I know HCl and ammonia both works well with the copper(I) chloride). However, I don't want to damage the sample. I have tried EDTA...

How do I work out the charge density of Copper Cu, if atomic mass =63.5 Density = 8920 kgm^-3 Assume 1 electron per cu atom.

How can a coil of wire help bring the net flux in a changing magnetic field back to zero?

The template doesn't really work well for mine considering its a lab sorry ><. I am quite confused on how to do the calculations on my chemistry lab, i have scanned, and rewritten my answers so they would be more clear :-) . the questions i have are on the 3rd and 4th image, I am just really not...

Homework Statement A conducting rod slides down between two frictionless vertical copper tracks at a constant speed of 4.5 m/s perpendicular to a 0.56-T magnetic field. The resistance of the rod and tracks is negligible. The rod maintains electrical contact with the tracks at all times and...

Homework Statement what are the different methods to finding the volume of a coper wire? Homework Equations The Attempt at a Solution

Greetings, I need to make a spring out of pure copper wire. I'm using 30 awg off a spool but I'm struggling to make the copper retain its original shape after being stretched. I don't know much about material science except that when metal is brought to a high temperature and then quickly...

Homework Statement (c) A 0.1036 g sample of copper metal is dissolved in 48 mL of concentrated HNO3 to form Cu2+ ions and then water is added to make a total volume of 208.1 mL. (Calculate the molarity of Cu2+.) Homework Equations Molarity = Moles/Liter The Attempt at a Solution...

Homework Statement A student wants to melt a 200 gram block of ice that is at minus 10.0°C and turn it into liquid water at 15.0°C. The student plans to do this by heating copper pellets to 100.0°C and then dropping them onto the block of ice in a thermally insulated container. How many...

Homework Statement A copper rod of mass 0.6 kg rests on two rails 1.3 m apart and carries a current of 31 A from one rail to the other. The coefficient of static friction is 0.3. What is the magnitude of the least magnetic field that would cause the bar to slide? Homework Equations F=...

Hello Guys! I was designing copper bus-bars which can withstand 1 kA current. Actually I am going to discharge a several DC capacitors into those bars. So, I was confused in the dimensioning the cross section. Is 25mm * 3mm cross section enough? I have made my calculation using 1.6 A/mm2...

Homework Statement The experiment we did was pretty basic, it was a copper box with five different metal rods (unlagged and of equal lengths and diameter) welded onto the bottom, on the bottom of each were pins stuck with petroleum jelly. Hot water was then added to the box and the order at...

Help me explain how the "magnet dropped down a copper tube" demo conserves energy I've tried explaining to this person that the potential energy you give a magnet when you do work against gravity to raise it up to the copper tube is all the energy it has to deal with, and once dropped down it...

1. A piece of copper whose density is 8.93 gm/cm^3 weighs 180 gm in air and 162 gm when submerged in a certain liquid. What is the density of the liquid? 2. d = m/v 3. I wasn't sure how to compute this but I calculated the volume of the copper based on its density and air weight...

In my table lamp, there is only a switch, and a copper coiled sheets of steel. I am in K9 and would like to know what are those sheets for ? My second very fundamental question is when should we use an adapter ? Thank you

Got exams in January so just want to make sure I am correct the questions read exactly like this a) The sample of copper wire reached its elastic limit when the stress is 1.4x10^8 Pa and the strain is 0.035 Calculate the Young's Modulus for copper. My attempt is Y= Stress/Strain => Y=...

1. Homework Statement 10) Both iron (III) oxide and copper (IV) oxide are mined for use as primary ores in the production of pure iron and copper respectively. Historically, the earliest use of copper tools appears to be around 4500 BC. Iron tools appear much later; European artifacts have...

Has anyone ever considered this issue with magnet falling in copper tube?? Homework Statement I must explain why a magnet falling in a copper tube slows down. Homework Equations F = B^qv However, I must *explain* this, I don't have to calculate anything The Attempt at a Solution...

Homework Statement How far does an average electron move along the wires of a 299 W toaster during an alternating current cycle? The power cord has copper wires of diameter 1.7 mm and is plugged into a standard 60 Hz 120 V ac outlet. Homework Equations Prms=IrmsVrms Ipeak=I0=Irms(sqrt...

Homework Statement A 20cm^3 block of lead and a 20cm^3 block of copper are completely under water. Each is suspended by a thread so that they both hand at the same height in an aquarium filled with water. Which of the following is true? a) The buoyant force is greater on the lead than on...