Recent content by siresmith

Equation apply to reversible only or not?? My thinking must be faulty somewhere, but I can't work out what's gonig on... The equation Tds = du + pdv and du = dq + dw are supposed to be valid for all processes right? yet dw = -pdv only for reversible cases, yes? So how do you...

Ok, used the integrator and... It came out as the standard integral suggests. But why ia the integration by parts method wrong?? I am sure i did it right. does integration by parts not work on certain functions or something weird like that? Or did i just get it wrong- what do you get?

2 answers to same integral??! Homework Statement Ive been giong mental over this. There seems to be two different answers to the same integral. I can't work out which is correct. Integral from 0 to infinity of: x(squared) exp(-2Bx(squared)) Homework Equations What is the right...

Hi, Why is -BEi used instead of +BEi as the lagrange multiplier for indistinguishable particles? How is it justified? I've been reading a book about statistical mechanics and it introduces lagrange multipliers first for distinguishable particles- it has ln(ni) + a + BEi = 0. (where a is...

Where does the plane wave solution (cos (ax-bt) and e 2pi(ax-bt)) come from? I know that any solution of the form f(ax-bt) is a solution to the general wave equation but why are the two particular ones above used for describing photons/ particles in quantum mechanics? Anyone here know...