# metal

1. ### Wood/Glass/Metal Help with the calculations: can a flat steel bar can hold this table?

Hi everyone! Brand new here. I'm sorry if this isn't the right place to post this but I am terrible with math/calculating anything so I thought I would reach out and ask! No harm done, hopefully. I'm building an 8' x 3' x 2" live edge walnut slab table and am trying to create some steel legs...
2. K

### Inducing electricity w/ moving piece of metal, static magnet

Hi! I'm curious to know, whether it is possible to produce electricity by moving a piece of metal over a magnet (i.e a immobile magnet and a moving piece of metal close to the magnet), and how this would be done in practice.
3. R

### Magnetic conductive material but thermally non conductive

HI, I have application where i need to lift metal plate, 3kg weight, ( 3mmX 15mm), 250degree.C hot, for the period of 1min and put it back. For lifting purpose i am using actuators. As i have no opportunity to make hole in plate i have to use magnet for lifting purpose. I got Electromagnet...
4. ### I Why is gold heavier than lead?

Not only are lead nuclei heavier than gold ones (207 vs 200), but the atoms are smaller (ionic radius 119pm vs 137pm). There is every reason for Pb to be heavier. Why is it lighter? (11.34 vs 19.31 g/cm^3) They both have a FCC crystal structure, so the packing should be equally efficient...
5. ### Can I use thermal expansion to hold together materials?

Okay, I will give a quick run down of what Im trying to do here. What I want to do is build a tesla turbine from old hard drive disks. Being that they're already rated for high RPM, it seems like a viable option. Now these disks are probably going to be aluminum and Im probably going to buy...
6. ### Metal: no attraction to magnet and block magnetic fields?

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
7. ### I Where does heat energy go?

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?
8. ### Calculate the maximum electrical force on a ball

1. 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. 2. Homework...
9. ### Thickness of components for equal strength

1. 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...
10. ### B High Pressure Sodium and Metal Halide lamps near plasma ball

I bought one of these plasma globes, decided to do some experiments with it. Since a fluorescent bulb will light up if It's put near the plasma ball, i tried the same with two HID lamps. The Metal Halide shows a very pale white arc, which disappears as soon as the plasma ball is turned off...
11. ### Can copper be harvested from discarded phone wire?

I have approximately 30 pounds of discarded phone wire. I would like to recycle the metals (copper?) within, but don't know if it is feasible or even worth attempting. I also just returned from helping a parent clean out the garage, including a retired aerospace engineer's vast collection of...
12. ### A A new invention but no completed

I am doing business with a Japanese partner to help japanese people to remain safe during earthquakes which require building a small metallic shelter in thier homes, it should stand the destruction during an earthquake. My question, what metal is the right choice? :oldconfused: It must have...
13. ### Laser and Metal

When blaster or laser is used to make a hole in a piece of metal is any of the matter of the metal completely eliminated from the universe?
14. ### How does band structure lead to metals/insulators?

I almost "get" it, but not quite. Can someone help? Here is my current understanding. Say you solve the Kronig-Penny model. You find that you get bands of N closely spaced energy levels, with large gaps between them. Under normal conditions, electrons fill the band to some level (let's say we...
15. ### Specific heat capacity coursework

1. Homework Statement earlier today i was doing some coursework to find the specific heat capacity of an unknown metal by submersing 100g / 0.1kg of the metal in boiling water above 75°C and record the temperature after 30 seconds (θm). we then had to transfer the the metal from the boiling...
16. ### How many energy a muon will lose when it pass through metal?

When a muon ( with energy around 1 GeV ) pass through a metal, such as Iron, which is about 1 mm in the z direction, how many energy the muon will lose ? Is there any formula to use?
17. ### Coordination Complexes

Is there any way (ex. MO theory, valence electrons, etc) to determine the coordination number of a metal ion with another ion? I know it is generally a multiple of the oxidation number of the metal ion. However, for something like Ni and NH3. how would I know that it's a coordination number of 6?