# Recent content by Shelnutt2

1. ### Need Some Metal Sheet Advice

I am working on a project, all details can be found http://www.overclockers.com/forums/showthread.php?t=680115" is the catalog page with the options. I've googled about annealed and "dead soft" however I still can't tell exactly how soft/flexible it is. All I need it to support is water running...
2. ### Invertible Matrix Question

Homework Statement Find all n x n-matrices A such that Q-1 A Q = A for all invertible n x n matrices Q. Homework Equations None The Attempt at a Solution Proof by induction Assumption: True for A = k(In) where k is a real number Base case: k = 1 When k =1 A = 1 * In...
3. ### Buy or make magnesium (local only)

We have a fisher scientific locally, but they want \$40+ for 100-300g of magnesium. An idea I was told about was to use magnesium oxide, which you can get from any nutrition place, such as a GNC. Mix it with hydocloric acid, to form MgCl + H20, then use electrolysis with carbon electrodes, to...
4. ### Buy or make magnesium (local only)

Hey guys, I'm on a bit of a time crunch here, I have to have everything buy Wednesday (10/27). I've been asked to give a presentation on food in the classroom at a meeting on Wednesday. What I normally like to do is a demonstration involving a Flameless heater. I just use the same technique...
5. ### System of Differential Equations

Thank you for leading me down the right path! I got it now :) The solution was y(t) = (5/2)e^(-4t)+(-3/2)e^(4t) x(t) =(5/2)e^(-4t)-(-3/2)e^(4t)
6. ### System of Differential Equations

Ah ok, I see. Now I get \frac{-1}{4}\frac{d^2y}{dt^2} = -4y \frac{-1}{4}\frac{d^2y}{dt^2} +4y = 0 so, \frac{-1}{4}r^2 + 4y = 0 y(t) = C1 e^(4t) + C2e^(-4t) Now doing the same for x(t), I end up with the same equation of x(t) = C1 e^(4t) + C2e^(-4t), however given my initial...
7. ### System of Differential Equations

Homework Statement So my friend asked me for help because he assumed having a math degree meant I knew math :rolleyes: [PLAIN]http://courses.webwork.maa.org:8080/wwtmp/equations/0e/c5a05957810916cfdff379ee0642fc1.png [Broken] (dx/dt=−4y and dy/dt = −4x) Convert this system to a...
8. ### Charge Density

Yes and no. You are talking about MHD propulsion, while I am talking about a generator to produce electricity. Same principles, but by no means do I supply the amps. The amps are created by the flow/movement of the fluid. Not the movement by the amps (which is what you are talking about). When...
9. ### Charge Density

Interesting, thanks for the link, it's quite detailed so I'm going to take my time reading through it. I guess I should explain to you exactly what I'm trying to figure out. What I want is to find the amperage of a flowing fluid. As long as there is a net charge in said fluid, and the fluid is...
10. ### Charge Density

Yes those are the units (expect I'm using meter not cm, but thats not overly important). For the fluid, seawater, brack/brine water, tap water. I guess maybe it's not as generic as I though, in terms of the equation and charge density in general. I'm looking at liquids specifically.

No one?
12. ### Charge Density

I need to find amps, so it's really all or nothing for that equation. Without the charge density, I'm left with Coulomb * m2 * m/s = Coulomb m3/s or Amp * m3. I need the charge density. As for the fluid, well I'm looking for how to find the change density for generic purposes. I don't have a...
13. ### Charge Density

Is this the wrong forum? Should I ask for it to be moved? I really wasn't 100% sure what forum this belonged in but I figured EE would cover it.
14. ### Charge Density

How would one determine the charge density of a fluid? I'm using the equation of I = qnvA . Amperes = charge of electron * charge density * velocity * Area. The only thing I'm not sure of is how to determine charge density. I've read several websites and I have a few textbooks here...
15. ### How to find the Atomic Structure of a Constituent

I got it from a textbook I have. The section talks about tachmen and uses a Tortoises-Hares fable to explain it. Really crummy section, the rest of the book is okay. So I was just going off of the one sentence I quoted below...