Stay the course and it will be worth it. I struggled with CalcII and Diff. Eq., got lost in Elect. & Mag., found help in the Phys. lab when I really needed it, and graduated yesterday from the Univ. of Arizona. The biggest hurdle I had to overcome was asking for help when I really needed it.
Bill
Don't worry, you are not alone. I just turned fifty and "should" graduate in May. Math is still hard, but the difference is I am more accustomed to it and less fearful. I will be taking a course in vibrations and I am dreading having to re-learn Fourier series, but I know the professor and what...
I feel so embarrased asking this question, but this is the place to get answers.
I have a 2nd order ODE with a forcing function that needs to be manipulated and put into a matrix for a numerical method solution, ie Matlab. My question is: Is the matrix composed of a particular solution in the...
Hello. I am in my senior year in mechanical engineering at the University of Arizona. I have spent the previous 25+ years hanging iron, installing mining equipment, building oilfield trucks and rigs, etc. I don't mean to hijack this thread, but a couple of thoughts have crossed my mind when...
Maybe my understanding of differential equations with boundaries is suspect. The code does run, the incrementation is taking place like it should. I did compute the second term and it is correct. The third term is correct, and the fourth, and the fifth.
I have egg on my face.
Bill
Got past the first problem, but I am stuck on another problem. The indices don't seem to be working like I think they should.
The equations of interest from the homework assigned:
dy/dx = -2y+5*exp(-x) % (y1)
dz/dx = (-y*z^2)/2 % (y2)
I am...
On problem # 2, set up a control volume, and calculate the energy in minus the energy out, which is zero. 20 degrees Centigrade is 20 degress centigrade, not 1.76.
For problem #3, you need to know the heat of fusion. When ice melts, it takes heat from the environment, which is the water. How...
I am having trouble with some Matlab code that I am writing. I am attempting to solve ODE writing my own code, per the Professor. That means I cannot use ODE45 or other built-in functions.
My problem: Oiler, a play on Euler, calls another function, FX, that contains the two equations that I...
A mechanical engineer is a mechanic with the tools in his head. He may or may not be good with a wrench or torch, but he will understand what has to be done and what not to do.
I am 49 and in my last year(I hope) of ME at the U of Arizona, and I wonder why I did not do this long ago. The...
I am having problems in Numerical Methods with Simpson's 3/8 rule of integration. Of course, this is computer driven. The code that I have written for Matlab (SV7) goes as such:
1) function simpson38(f,n,a,b)
2) h = (b-a)/n;
3) x = a;
4) sum = f(x);
5) for i = 1:3:(n-3)
6) x = x + h...