Metal Definition and 999 Threads

I would like to know the sheet resistance of a metal mesh that consists of 3 larger busbars (W=0.0025 cm L=0.3 cm) and 10 smaller fingers (W= 0.0002 cm L= 0,16416 cm) which are all connected by a big collection bar. The thickness of the whole layer is 0.00. This collection bar has been...

Homework Statement I need to identify which class bar 1 and bar 2 belong in based on observed attraction/repulsion. Then I need to determine if the end of 2A would attract, repel, or niether to end 3A. EDIT: Could not get this image in the post due to security reason apparently so here is the...

Homework Statement X and Y are two uncharged metal spheres on insulating stands, and are in contact with each other. A positively charged rod R is brought close to X. Sphere Y is then physically moved away from X. What are the final charge states of X and Y? Homework Equations N/A The...

Hi, Can anyone help me in finding out a Diamagnetic or Paramagnetism or Ferromagnetism or any other metal which has following capabilities: 1- Should not be attractive towards magnet. 2- Should not allow magnetic fields to pass through inside. Thanks! THG

Hello. I'm using CT (Current Transformer) to measure the current flowing on the power line. The frequency of the current is 13.56 MHz. CT appeared to be metal-shielded (This metal case of CT may be grounded when CT is used). CT has a toroidal shape and the power line under the measurement...

Hi all, I have a question about charging a meta plate or a piece of metal with a capacitor. I need to charge a plate to negative or positive and search for some methods. I know charging by Conduction, Friction and Induction. I would like to use another method. I want to charge a capacitor (E.g...

Homework Statement A metallic sphere is charged. Where will the charges go? At center or on surface or uniformly distributed. Homework Equations I think it should be uniformly distributed. Cause that's why we have terms like volume charge density like we do q/volume. The Attempt at a Solution...

Homework Statement A uniform metal pole of height ##30.0m## and a mass ##100kg## is initially standing upright but then falls over one side without its lower end sliding or losing contact with the ground.What is the linear speed of the pole's upper end just before impact ? Homework...

Homework Statement A total charge of 21 μC is applied to a thin, 1μm square metal plate 72 cm on a side. Find the electric field strength near the plate's surface, far from the edges. Homework Equations I think E = kq/r^2, but I really don't know. The Attempt at a Solution I am...

Homework Statement Two large metal plates of area 1.1 m^2 face each other, 6.2 cm apart, with equal charge magnitudes but opposite signs. The field magnitude E between them (neglect fringing) is 50 N/C. Find |q|.Homework Equations |q|=σA E=σ/(2Eo)⇒σ=2EoE |q|=2EoEA The Attempt at a Solution I...

Homework Statement A metal ring with a radius of 10cm and resistance 0.1Ω passes through a delimited magnetic field, look at the photo posted below. The ring has a velocity of 5m/s, and the magnetic field has the field strength 0.4T. When the ring passes through the magnetic field, at some...

I need the ionic radius of the cation in the following anhydrous salts: FeCl2 and CoCl2 Looking at this database: http://www.knowledgedoor.com/2/elements_handbook/shannon-prewitt_effective_ionic_radius_part_2.html Knowing that the coordination number of both Fe2+ and Co2+ cations is 6, I am...

Homework Statement [/B] I had an inorganic lab this week which involved making VO(acac)2 from VOSO4⋅xH2O. In order to calculate the percentage yield, I need to work out x, that is, the number of water molecules coordinated with the vanadyl sulfate n-hydrate before the reaction. I'm stuck...

Hi, Consider a wire with a pulsating DC current next to another wire. The expanding and contraction magnetic field induces a current into the second wire. Consider the same but in the second case we have a metal chassis. I assume the same magnetic field is inducing a current into the chassis...

When heat is dissipated into a piece of metal(aluminum for example), what happens to the potential energy that was stored in the heat? Does it transform into another form of energy or is it absorbed by the atoms of the metal element?

to caracterize for exple metallic nanoparticles with SEM i should deposite them on a substrate i tried a deposition on glass substrate but it doesn't work and i see nothing can anyone help me or suggest an appropriate solution to that best regards

What are the differences between 1) Metal Organic Frameworks (MOFs), 2) Covalent Organic Polymers (COFs) and 3) Porous Organic Polymers (POPs)?? 2 are the same like 1, but there is no coordination bond just covalent bonds? 3 there is no metal atom? how to distinguish between such a similar species?

Homework Statement I'm asked to find the specific heat of Metal X in this simulation: http://group.chem.iastate.edu/Greenbowe/sections/projectfolder/flashfiles/thermochem/heat_metal.html Mass of Metal X = 120 g Temp of Metal X = 220 degrees Mass of Water = 30 g Initial Temp of Water = 20...

I put a tumble dryer that had been used only a few times back in operation after a decade being completely out of service. Heating failed shortly after switching on. Checked the heating element and noticed that it is broken at a dozen locations. The spiral is very brittle and breaks easily when...

Homework Statement Part one : A number of metals react with HCl to form salts of general formula MCl2. Write a balanced chemical equation for such a reaction. After a piece of one of these metals had reacted completely with the acid in 55.8 cm3 of 1.24M HCl, the resulting solution, which...

Homework Statement Homework Equations $$mgh = \frac{1}{2}v^2$$ The Attempt at a Solution [/B] I'm working on a). I tried using conservation of energy to get v. $$mg(c+b) = \frac{1}{2}v^2$$ $$v = \sqrt{2g(c+b)}$$ After this I'm stuck. In order to get distance from knowing the velocity...

Take the case where the electron-beam is oscillating between two parallel metal plates, there will be alternating potential developed between the plates as metal tries to negate all external electric fields. My query is, (1) How to calculate the potential developed and possible way to simulate...

Homework Statement A metal ball of radius ##a## is at a distance ##h>>a## from a very long conducting non-charged horizontal metal surface. Calculate the maximum electrical force on a ball under the condition that ##E_{cr}## the critical electric field of air is not breached. Homework Equations...

Our professor did a demonstration today for our physics II class. She was demonstrating electromagnetic induction with a solenoid and a metal ring. When she slid the ring down the solenoid and passed alternating current through the solenoid, the metal ring was flung upward off the solenoid. My...

I am simulating a system, where I have a semiconductor with a charge distribution in the conduction band coupled to a metal. I want to calculate the electrostatic potential due to this charge distribution but some things are confusing me. To calculate the electrostatic potential I solve Poissons...

So I'm looking to calculate the time required to raise the temperature of a piece of lead. What I know so far: Mass of metal: 4 grams Initial temperature: 250 degrees Celsius Final temperature: 350 degrees Celsius Specific heat of lead: 0.13 kj/kg I'm very new to thermodynamics and don't know if...

I'm curious if anyone knows of a good video of an extreme amount of pressure being applied to a sold amount of metal or other dense object. We're learning about fluids in my class, and naturally we discussed submarines, empty bottles, etc. but everything mentioned seemed to be hollow on the...

Suppose I want to solve the 1D, time-independent Schrödinger-equation for a metal-semiconductor junction. In the metal region the Schrödinger equation reads: (p^2/2m + V)ψ = Eψ In the semiconductor region the Schrödinger equation reads: (p^2/2m* + V + ΔESM)ψ = Eψ My question is: Is there a...

Homework Statement Consider the metal-vacuum interface located at z = 0,the metal filling the entire half-space z ≥ 0, vacuum filling (!?) the half-space z < 0. The dielectric function in the metal in the long-wavelength limit is given by: where ε0 is the vacuum permittivity. In the metal a...

Homework Statement [/B] Two long, coaxial metal cylinders are separated by a material of conductivity sigma and dielectric constant epsilon. The radius of the inner cylinder is a, the radius of outer cylinder is b, and the length of both is L. Suppose that the inner conductor is held at a...

Imagine you have two identical metal balls, each carrying the same amount of charge, but with one ball being positive and the other negative. When you bring them close together, there will be polarization, so you can no longer treat the balls as point charges. How does one find the charge...

Hi, I am new to this forum. I need to design an interference fit for a 1.5 mm thick SS ring. The interference fit is between this ring and another 1.5 mm thick SS sheet metal can without any groove. The ring is bent outwards at a specific angle.(please refer attached image) We know amount of...

Homework Statement A metal block of heat capacity 60 J K -1 loses 1MJ of heat energy to its surroundings. Find the decrease in its temperature. Homework Equations Q = m c Δ θ Heat energy added = mass x specific heat capacity x rise in temperature heat energy lost = blah blah blah x drop in...

I thought about a solar furnace prototype. It is like this: light from the Sun is concentrated with a system of parabolic and plane mirrors on the surface of a rock, which is contained inside a vessel. The light and heat is not meant to reach the vessel, only the rock; the vessel could be...

When preparing a fine powder for trace metal analysis, is ashing prior to digesting unnecessary? If not, or not necessarily, where could I learn more about important considerations to determine whether of not any preparation prior to digestion is required? The one instance I have come across...

Consider two atoms of platinum, A and B, in a sample of platinum. Atom A lives deep within the sample, and atom B lives at the tip of a sharp protuberance at the surface. My understanding is that electrons in the sample will accumulate within a surface defect such as the tip of a sharp needle...

Hello, I'm looking to build a metal detector. I shant get into all aspects of it, just the first for now. I have a BSc Physics so you can get mathematical if you want but not much electrical experience. I need an LC circuit to build a beat frequency oscillator metal detector. It should...

Will liquid metals create droplets when falling or will they create different shapes?

Hello. I'm now taking accelerator physics class and the lectures said in the thermionic electron gun, anode metal mesh should be grounded in order to prevent electrons which traveled beyond the mesh from coming back due to the electric field lines. Without grounding of the anode, I believe...

is there any way to fully neutralize a charged metal plate ? connecting it to metal body of relatively huge capacitance will make its charge negligible but not zero? is there any other way?

Homework Statement The conduction band of a metal is partially filled. When an electron of a metal from a lower band is excited and becomes mobile, the metal conducts electricity. The excitation also leaves behind a hole in the lower band. Q1. Does this hole contribute to the electrical...

Homework Statement All of the lanthanide metals (La through Lu) react with HCL to form compounds having eithe the formula MCl2, MCl3, MCl4, (where M represents the metallic element). Each metal forms a single compound. A chemist has a 0.250g sample of a lanthanide metal, and she wishes to...

We are doing spectroscopy on some semiconductors covered by a layer of Aluminium. My professor says it might be a challenge for to see the valence band structure of the semiconductor because the metal has a high density of states at the fermi level. Does this make sense to you? Does a metal have...

How much force is needed to cut in half a tough tool steel beam 5 cm wide and 1 cm thick? Theoretically, the cohesion is low. For example, the surface tension of water is 71 mN/m. Some materials are more cohesive. Quicksilver has surface tension of 450 mN/m. Molten gold and copper have over 1...

My question is that I have to find the dimensions of a rectangular prism (cuboid), where none of the faces are square that will maximise its volume. The sheet metal I have to build it from is 120 cm by 80 cm. I don't even know where to start, I can do it if I'm given a height, width or length...

1. The problem statement, all variables and given/known Mg metal reacts with HCl to produce hydrogen gas. What is the minimum volume of HCl solution (27% by weight) required to produce 12.1 g of H2? Density of HCl solution is 1.14 g/cm3Homework Equations [/B] This question...

Homework Statement Givens: - Each of the 2 cylindrical posts are 0.5 inches thick. - The posts and chain links are made of galvanized steel of identical material composition. - The posts and chain links are solid. - Each post is permanently fixed to unbreakable surfaces. The surfaces will move...

Which would it be better to store (relatively) heat sensitive stuff in, if the container will be outside but in another case. I know black absorbs more heat but shiny objects _reflect_ more heat, so which would do less damage to the contents of the container? If the container is in the sun but...

Homework Statement A coloured solution, known to contain two metal ions, was treated with excess cold sodium hydroxide solution. When filtered a whitish solid, slowly changing to brown, was retained on the filter paper and a colourless solution collected as the filtrate. Dropwise addition of...

Homework Statement A solution of a trivalent metal ion is electrolysed by a current of 5.0A for 10 minutes during which time 1.18g of metal was plated out. The identity of the metal is: A cobalt B chromium C indium D gallium E bismuth Relative atomic masses: 1 faraday = 96,486 coulombs...