Recent content by Agent M27

Homework Statement A musicians tuning fork rings at A above middle C, 440Hz. A sound meter level meter indicates the sound intensity decreases by a factor of 5 in 4 seconds. What is Q of the tuning fork? Homework Equations Q=\frac{\omega}{2\beta}...

I applied to UC Davis UCLA Notre Dame Lehigh William and Mary UF CU Boulder I applied to all of them seeking something in the condensed matter experimental research area. I just got an email today stating my acceptance to William and Mary, so I am pretty stoked about that! I am going to...

Ah ha! Thanks a lot Vela.

Homework Statement This is problem 2.22 from D.J. Griffiths Introduction to Quantum Mechanics A free particle has the initial wave function: \Psi(x,0)=Ae^{-ax^{2}} Find \Psi(x,t). Hint Integrals of the form: \int_{-\infty}^{\infty}e^{-(ax^{2}+bx)}dx can be handled by completing the square...

Crap you're correct Mark, the equation actually read as x(x-y-2)dx+y(y-x+4)dy=0. I have determined that I need to do some sort of substitution, using v=y/x, which ought to transform it into some sort of separable variables. However, I am still running into trouble attempting to separate into...

Homework Statement So I had my final exam today in ODE and I had an equation which appeared to be exact, but was not. I also tried to find a special integrating factor to make it exact, but no success. I then attempted to manipulate it into a linear eq, tried separable variables, even...

I took it easy over the summer, really only working on one or two things so I had to kick it up a few notches for fall. I am a physics major, with a minor in math. I will have the math minor completed in the spring of 2012 after my two Applied PDE classes. Fall 2011: Differential Equations...

I am working in MATLAB and have created a function, which I will call in the command window. Here is the code: function y=intensity(img) tic im = imread(img); R = im(:,:,1); G = im(:,:,2); B = im(:,:,3); r = im2double(R); g = im2double(G); b = im2double(B); rgbsum = r + g + b; intensity =...

After further searching and reading in another book, I think they are asking me to find the membrane potential using the Nernst potentials I found and the conductances given. This can be done using the equation for membrane potentials. Is it safe to assume a threshold which is roughly 5mV more...

Homework Statement We will deal here with a certain identified synapse in the CNS of the mooncalf (Bos lunaris). The post synaptic cell has voltage-sensitive channels like the squid axon-- a rapidly depolarizing, inactivating channel which conducts only sodium ions, and a slowly depolarizing...

I didn't even think about the transitivity of A and C until you pointed it out! I always over complicate these things. I think I will employ that method tomorrow should this problem appear on my exam. Thanks for your help. Joe

These sort of proofs are sometimes easier to complete via contradiction. So in your case: Assume that the set of all functions f:N -> (0,1) is countable...Also as with any proof, an accurate knowledge of the definitions is imperative. I'm not saying you don't, but just incase here are a few...

I believe your problem is stemming from the presence of the differentials, dx and dy. The general form of a line integral is the following: \int_C M dx + N dy Where M & N relate to the quantities in your problem such that: M = tan(y) N = x sec^2 (y) Now we know for a force to be...

Homework Statement Suppose there exist three functions: f:A\stackrel{1-1}{\rightarrow}B g:B\stackrel{1-1}{\rightarrow}C h:C\stackrel{1-1}{\rightarrow}A Prove A\approxB\approxC Do not assume the functions map onto their codomains. Homework Equations The Attempt at a Solution I took a...

Linear Algebra Intro to Probability Differential Equations Biology 2 Biology 2 Lab Undergrad Research