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1. ### Help cosmology introductory

can anyone give me any information on some good books, online books or lecture notes to help me with university introductory cosmology i have my lecture notes but they are very poor and i find it difficult reading and interpreting what is going on thanks
2. ### TDS ratio specific heat help

Explaining your reasoning, show that the ratio of the specifc heat is CP/CV = (DP/DV)s / (DP/DV)t hint :use TDS EQUATIONS I have used tds equation 3 and tds equation 1 and equated them,but i am stuck because i get to an equation like (CP/CV-1)(DT/DV)p = T(DP/DT)v and just do not...
3. ### Fourier Series

can anyone help me interpret what exactly this question is asking as i am quite unawares By direct substitution into the heat equation and calculation of boundary values, verify that the solution u(x, t) for a metal rod of length L which satisfies the initial temperature u(x, 0) = f(x) and...
4. ### Can anyone help thermodynamics specific heat

Explaining your reasoning, show that the ratio of the specifc heat is CP/CV = (DP/DV)s / (DP/DV)t hint :use TDS EQUATIONS I have used tds equation 3 and tds equation 1 and equated them,but i am stuck because i get to an equation like (CP/CV-1)(DT/DV)p = T(DP/DT)v and just do...
5. ### Spin in Quantum mechanics

The spin of an electron is described by a vector psi = column vector with two entries,psi up and psi down Give the general expressions for the probabilities to find Sz= +or- h/2 in a measurement of S^z where Sz=h/2(1 0) as a matrix ( 0 -1) ii)Give the general...
6. ### Rotating molecule

b) Calculate the matrix which represents the Hamiltonian H= 1{(L)^2}/2I + Alpha*(L^z) H = part A + part B where alpha is a constant and so is I and also L^2 = Lx^2 + Ly^2 + Lz^2 (1) heres what i have done. i have calculated L^2 From adding matrices from 1 and it...
7. ### Yukawa potential ,confused

could anyone help me also with this question as i am very confused,i have read my notes but i really have a problem with this stuff making anysense, any help would be appreciated thanks:redface: question 6)) The Yukawa potential is given by V°(gamma)(r) = (q)^2/{ 4(pi)(eo)0r...
8. ### Help quantum mechanics spin

The spin of an electron is described by a vector spinor and the spin operator ^S = ^ Sxi + ^ Syj + ^ Szk with components how would i go about normalizing a state like the one below,i am miles away to what is going on here c) (i) Normalise the state (1 1) *this is meant to be a column...
9. ### Thermodynamic potential question,help!

i have studied my lecture notes back to front and looked high and low for a clue how to do this question but i tried in a) constructing an expression for u and came up with DU= +TDS -PDV - FDL BAUT I COULD BE MILES OUT. could anyone help. thanks here it goes: A piece of rubber of...
10. ### Can anyone help? in quantum mechanics commutator prove [L^x,L^y] = ihL^z

can anyone help?? in quantum mechanics commutator prove [L^x,L^y] = ihL^z given :L^x =(y^(pz)^-z^(py)^) :L^y =(z^(px)^-x^(pz)^) :L^z =(x^(py)^-y^(px)^) where ^ is just showing its operator prove comutator [L^x,L^y] = ihL^z I am swamped at every hurdle and cant seem to get my...