Recent content by pr0me7heu2

The easiest way to do it is: syms x y n v=4/pi*symsum(1/(2*n+1)*exp(-(2*n+1)*pi*x)*sin((2*n+1)*pi*y),n,0,100); ezsurf(v) https://docs.google.com/file/d/0B56mzK7jKc5ebE9nYlNVMUhuWVk/edit?usp=sharing ...still trying to work out complex errors if I try to do this without symbolic...

I thought it would be as simple as: >> syms V0 n x y a >> for i=1:2:inf; i=n; s=1/n*exp(-n*pi*x/a)*sin(n*pi*y/a); end f=4*V0/pi*s; ezsurf(f) but this returns nothing; no error nothing. This is more for personal enrichment, rather than a class... unless someone else comes by and posts some...

How to make a surface plot involving an infinite series in Matlab Solving Laplace's equation for electric potential for a 2D surface yields: V(x,y) = 4 Vo/pi * Ʃ (n=1,3,5,...) (1/n e^(-npi*x/a) sin(n*pi*y/a) ,where a is and Vo are constants ...it's convoluted, but basically, I need to...

Homework Statement I am trying to directly calculate the electric field (using Coulomb) at some arbitrary point P(0,0,z). The charge is evenly distributed over the surface of a sphere (radius R, charge density σ). Here I use θ for the polar angle and p for the azimuthal angle. I will leave...

This problem was driving me crazy as well... I, as The Electrician also calculated, found the b,d,and f are producing 770 mW and a,c, and e are absorbing 770 mW. Yet, as the answer in the back of the book (Nilsson / Riedel Electric Circuits 8.e) gives 770 mw. Carefully reading the question...

,so in class we're covering second-order D.E.s... How exactly was it determined/derived that all solutions to homogeneous 2nd-order linear differential equations with constant coefficients (ay'' + by' + cy =0, where a,b,c are real constants) are of the form y=ert. Not asking for anyone to...

...because the method of haphazrdly looking at the equation and thinking, "what will make this exact?" isn't exactly a method that will work all the time. And the method presented in the book and class yields factors that would simply suck trying to integrate. I was just curious if there were...

Easier way of finding Integrating Factor for Exact Differential Equation?? Homework Statement ,find an integrating factor and then solve the following: [4(x3/y2)+(3/y)]dx + [3(x/y2)+4y]dy = 0 Homework Equations u(y)=y2 is a valid integrating factor that yields a solution...

Undefined Limits as k--> 0 Homework Statement lim(k-->0) [ (-mg)/k + v*e^(kt/m) + (mg)/k*e^(kt/m)] ,the end result of this limit is ultimately supposed to be v -gt (or the velocity of an object at any time t neglecting air resistance). Homework Equations This equation comes...

Would all bases be sets of orthogonal (but not necessarily orthonormal) vectors?

Suppose f(x)= -2x+1 is a vector in the vector space C[0,1]. Calculating the norm (f,f) results in 1/3. I'm a little confused. So on [0,1] the function is a straight line from (0,1) to (0,-1). So I thought I could simply takes this line segment and turn it into a directed line segment...

So I'm considering dimensions of real vector spaces. I found myself thinking about the following: So for the vector space R2 there are the following possible subspaces: 1. {0} 2. R2 3. All the lines through the origin. Then I considered R3. For the vector space R3 there are the...

I have probably over thought the whole thing... but I can't seem to find any place to start with this one: Using the formal definition of a limit: f(x,y)= y / (x^2 + 1) e=0.05