Recent content by nyxynyx

I'm currently reading about Temperature Programmed Desorption (TPD) and is wondering why in the graph of desorption rate (molecules/cm2/sec) against temperature (deg C), the area under the curve is the total number of particles desorbed? Isnt the units (molecules/cm/sec/degC) if u integrate the...

http://edu.ioffe.ru/register/?doc=galperin/l3pdf2.tex I don't understand how do you get from equation 21 to 22? How did the summations of exponentials becomes cosine functins?

I'm having a problem understand entropy. From my book, it says the following: There is an example that says that What I don't understand is if there is an increase in entropy, which is the increase in disorder, why does the hot water cool spontaneously when cooling the water makes the...

Im still unable to figure this out... need a little help thanks :)

Is there a better equation to use to plot out the binary eutectic phase diagram?

I believe it has to do with Mott's work.

I'm planning to plot phase diagrams of Temperature vs Composition. I found the formula ln(x) = \frac{\Delta H}{R} (\frac{1}{T_A} - \frac{1}{T}) from the Clapeyron equation. Its a ideal solution of 2 metals in L state and regular solution in S state. Eutectic temperature is at 850C and enthalpy...

I keep seeing density of states and sometimes density of orbitals. What is the difference between a state and an orbital? Also, due to Pauli exclusion principle, does each orbital contain 1 or 2 electrons? I'm guessing each orbital have 1 electron, and there can be 2 orbitals with same...

Homework Statement How do I figure out the intensity of diffraction spots after doing Bragg diffraction on a particular 2D lattice? Homework Equations The Attempt at a Solution I'll guess I make 1 spot in the diffraction pattern the strongest, and the diffraction spots around it...

i would like to know that! i believe it has got something to do with the extinction rules but I can't find any tables for extinction rules of tetragonal and orthorhombic

what equation is this called? what are the parameters 'l' and 'c'? how do u find lattice parameter if the cell is not cubic but tetragonal or orthorhombic?

anyone pls?

thnx f95toli this works!

Hi, I need to draw a circle in MATLAB that has a certain color (the fill, not the border). How can i do that? Right now I am drawing the circle with the rectangle function. Thanks!

Hi, I'm plotting some circles in a 20x20 arrangement using the rectangle tool and I have to label each of the circle a number from 1 to 400. However, the following code does not do what i once, since i think i can only label with strings and not running numbers... for i=1:400...