Recent content by Mechdude

Homework Statement im trying to get concept of moving a particle in a Variational Monte Carlo calcualation and i still haven't a clue on how to do that, all i get are really bad acceptance ratios Homework Equations Here is my code: def VMC(WF,numSteps): EnergyList=[] ####...

never thought i would be posting here, but how many good apps out there on the android market place cater to lovers/friends/fiancées? naive question? maybe, but i would love to hear what makes a good app for lovers/friends

hi, i chanced on this great list of a collection of papers fron the annals der physik here: http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%291521-3889/homepage/BestOfAdP.html#1900 it lists some of the best works of the early 20th century, like Drudes original paper, Debye...

thanks robphy, those links are fantastic. cheers.

This is not a H/W problem, but i don't have write permissions in math/science learning materials. i was looking for a collection of the most important quantum physics papers collected from the 20's kind of like the following that i found interesting, but is for chemists...

clamtrox, do you have an idea of a nice book that teaches this stuff in a nice easy to follow manner? i have always had trouble with this stuff. mechdude.

Hi im looking at a book and for a cubic structure they have stated about 20 special k-points are found, does anyone have a tutorial like resource for how this is done? or can anyone offer some insight? mechdude. ps see attached for what I am referring to.

one quick last one, has anyone seen this question before? is n=8.1 really? is that the correct answer that i need to find when i correct this guy's unholy mess?

i doubt it will lead to that, but yes, angular momentum is still conserved to answer your first question. To get the formula conservation of angular momentum would still work, though it would seem like a one step (so short it seems like a trick) solution imho.

Ok, i see that now, i had not noticed that the differentiation had already been done, so that's why you kept on insisting on the negative sign, ( i admit i was clueless why until now). thanks. Let me work on it and see whether i can better this guy's work. cheers.

remember the rope with mass gains P.E. while moving upwards, what form of energy does the mass on the table have? some of that is converted to P.E., and so the (insert answer to my question here) should remain constant.

though i think the r_o is the r corresponding to minimum P.E., looking at II.2.7 and the paragraph preceeding it.

how did u do that? in II.2.8 there is (for stuff after partial differentiation***{EDIT}) \frac{1}{6r^2} \left( ME^2 \frac{1}{r} - \frac{nC}{r^n} \right) how does this end up being \frac{1}{6} \left( ME^2 \frac{1}{r^4} - \frac{nC}{r^{n+3}} \right) when the stuff just outside the bracket...

Homework Statement please look at equations II.2.8 , II.2.9, II.2.10 in the attached scan, Homework Equations noneThe Attempt at a Solution im unable to get from II.2.8 to II.2.9, i wonder where they got the extra r in the denominator of the stuff in the brackets, here is what i get for...

Thanks for the reply M Quack, so meopemuk used this physical reason to come up with the concept of large (relative to unit cells) translation vectors? and the corresponding small reciprocal vectors? mechdude.