Homework Statement
y''' - y = e^x + 7
Homework Equations
The Attempt at a Solution
I used y=Ae^x +B and then I multiplied by x^2 because y_c = c1 + c2 e^x + c3 e^(-x)
the c1 and c2 e^x value repeat. Therefore I got: y= Ax^2 e^x + Bx^2
I got A = 0 and A=1 which is wrong...
Most of my high school teachers waisted my time. They took forever to get everyone to settle down, so that he or she could start lecturing. Sometimes the teacher waited for ten to fifteen minutes after the bell rang before starting class. I had seven classes everyday, and just about every single...
I wouldn't do the same problems again. I would try to solve for the given value after I solve the problem: work backwards. Or I would solve the other problems in the book. teachers don't assign all of them.
Yes I think that is my problem. I don't know how to draw the diagram. Can you explain me what you understood? I have read it several times and I just don't get it
Homework Statement
A rod of length L_0 moves with a speed v along the horizontal direction. The rod makes an angle of θ_0 with respect to the x'-axis.
a. Show that the length of the rod as measured by a stationary observer is given by L = L_o [1 - (v^2 / c^2) cos^2 (θ_o) ]^(.5)...
I am trying to understand why v = (T/mu)^(1/2) Equation 16.18
EDIT: T is tension, mu is the mass divided by the length of the string, v is the speed of the wave on the string.
According to my book:
"Let us use a mechanical analysis to derive Equation 16.18. Consider a pulse mov-
ing...
If you are a girl there is the all girls all math summer camp at the university of Nebraska-Lincoln (one week only though, focuses on codes). Also the university of Washington in Seattle has a math summer camp (part of the application is solving some problems that require proofs)