# Recent content by Shay10825

1. ### Electric potential of square loop

Is this better? http://img823.imageshack.us/i/scan0004zg.jpg/
2. ### Electric potential of square loop

Homework Statement There are four uniformly charged rods of linear charge density \lambda and length a, arranged as a square. What is the electric potential a distance z from the center of the square and along the symmetrical axis? The Attempt at a Solution...
3. ### Argument Theorem - Complex Analysis

Homework Statement Evaluate (1/2ipi)* contour integral of [z^(n-1)] / [(3z^n) - 1 ] dz Homework Equations I would assume you would have to use the Argument Theorem since this problem comes after the proof of the argument theorem in my book. The Attempt at a Solution z^(n-1)...
4. ### Complex Analysis: Integration

Homework Statement Evaluate the following integral for 0<r<1 by writing \cos\theta = \frac{1}{2}(e^{i\theta} + e^{-i\theta}) reducing the given integral to a complex integral over the unit circle. Evaluate: \displaystyle{\frac{1}{2\pi}\int_0^{2\pi}\frac{1}{1-2r\cos\theta +...
5. ### Does NaCl dissolve in HCl?

Hi everyone! I just have a quick question. If I took NaCl and put it in a 1.00 M HCl solution, would the NaCl dissolve? Thanks
6. ### Solving quadratic congruences

Homework Statement Hello everyone! How would you solve a quadratic or nth degree congruence? For example how would I solve: (x^2) + 2x -3 = 0 (mod 8 ) The Attempt at a Solution I know this can be written like: (x^2) + 2x = 3 (mod 8 ) but where would I go from here? and...
7. ### Basis for P2 and Linear Transformation

b) it was suppose to be a = 2 x + 3 b = 3 x2 + 1 c = -5 x2 + x - 1
8. ### Basis for P2 and Linear Transformation

Hello. I'm having some trouble with this problem. Any help would be greatly appreciated. Homework Statement Consider B= (2x+3, 3x^2 +1, -5x^2 + x-1} a) Prove that B is a basis for P_2 b) Express -x^2 - 2 as a linear combination of the elements of B c) If t: P_2 -> P_2 is a linear...
9. ### Jobs for astronomers

Hello. I am currently a High School student wanting to peruse a career in astronomy. I was wondering if there are better job opportunities for astronomers and astrophysicists in countries other than the United States? and if so then which countries? Thanks
10. ### Multiple integraion

Hello everyone! I need some help with the following problems. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 2. Use spherical coordinates to find the center of mass of the sphere of radius 7 and centered at the origin in which the density at any point is proportional to the distance of the point...
11. ### Work and energy

ok thanks:smile: i figured it out now Thanks
12. ### Work and energy

What exactly does the F stand for? I know the f is the force of friction. Thanks
13. ### Work and energy

F(parallel) = mgsin(theta) f = mgsin(theta) - mg right?
14. ### Work and energy

I copied it directly from the worksheet I was given http://img61.imageshack.us/img61/6411/phylab32ml.jpg [Broken]
15. ### Work and energy

ok http://img360.imageshack.us/img360/5497/phylab26gk.jpg [Broken]