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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)

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...
4. 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...
5. 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...
6. How to find the Atomic Structure of a Constituent

For a project/idea I'm working on, I need to find the charge density of tap water. I've read that this can be determined by simply subtracting total protons minus total electrons. I've got a list of elements that are in the water, but I'm not 100% sure how to find the exact number of electrons...
7. Losing Valence Electrons

So I've read through https://www.physicsforums.com/showthread.php?t=32409" thread on valence electrons but it doesn't really answer my question. I think I am in the right forum, I was debating between here and chemistry but it deals more with atoms. What I want to know is this: How do I...
8. Increasing voltage, from millivolts to 120volts

I'm working on a design for a certain kind of generator. My main issue is that based on how the generator works and the circumstances in which I am designing it for, I end up with the problem of having very little voltage but a whole lot of amps. My theoretical/ideal voltage is .065v, and my...
9. Finding Charge Density of Solution and then Amps

Alright, I'm working on an idea for a MHD generator, and I have a water based solution. That is Cl- 6250 mg/L or 176 mmol/L SO4^2- 6250 mg/L or 65 mmol/L Na+ 6250 mg/L or 272 mmol/L K+ 6250 mg/L or 160 mmol/L Ca^2+ 5000 mg/L or 125 mmol/L If I'm doing my math right, that means my...
10. Electrical Conductivity of Fluids

So it has always been my understanding that in order for something to electrically conductive it has to have more electrons than it needs. If the electrons can be easily shaken from their atoms, then it's conductive. The easier it is for the electron to move to the next atom the more conductive...
11. Ion Exchange of NaCl from H2O

Leaving the physics out of this, I'm working on an idea for an in home MHD generator. I'm trying to figure out a conductive fluid to use. I'm back to the idea of salt water, or H20 + NaCl. I know this is a very conductive solution, but I'm no chemist. What I plan to do is put a MHD generator and...
12. Conductive liquids

I'm working on a project and right now my idea fluid is to use Gallium, a liquid metal. Only major issue is its currently about \$1000 USD for 1kg of this stuff!So I can't afford gallium. Mercury isn't that cheap either and its a bit dangerous if not handled properly. What about other fluids...
13. Siemens CompetitionMHD Generator

http://www.collegeboard.com/student/pay/scholarships-and-aid/23619.html I'm going to be entering into that (^^^) competition with one other person. We are going to be doing it on an MHD generator and its use for automotive transportation and as a home generator, amoung other uses. We are just...
14. Need help building FM Transmitter

So I'm trying to get my fm circuit to work. I've taken the design from the website below. http://cappels.org/dproj/FMdist/fmdis.htm http://img217.imageshack.us/img217/6839/fmdis3un4.jpg [Broken] My current issue is that the circuit works, but only when hooked to a DC transformer. I get a...