Recent content by lms_89

What is your h representing? Also though I have Q_1 and Q_2, so which would it be and how would I get it from the efficiency since surely I only know the ratio of the two Q values? Thanks both of you for your help so far, by the way.

I used the temperatures to calculate the efficiency, just wrote down the Q version of the formula because I thought it might be relevant, but am not sure how you can use it considering you know neither of the values. Obviously you can say Q_1/Q_2 = T_1/T_2 = 0.28 though.

I guess I'm not sure what answer would 'seem right'! Perhaps some energy does go to the cold reservoir, but I don't know how you would do that. This is a past exam question on the 'easy'/bookwork section of the paper designed to get everyone some marks, so the questions are generally quite...

Homework Statement A Carnot engine using a gas operates between 2 reservoirs of temperatures 1000K and 280K. The work output per cycle is 1kJ. a) What is the efficiency? b) What is the entropy change of the gas per cycle due to the heat transfer at the hot reservoir? Homework Equations...

Ah ok, thanks. I'll have another think about it :)

Homework Statement In spherical polars, the azimuthal part of the wavefunction of a particle is psi(phi) = 1/sqrt[2.pi] . exp[i.m.phi] where phi is the azimuthal angle. Show m must be an integer.Homework Equations I know you are supposed to have a good go at solving the problem first, but...

Ok.. that helps a bit. Thanks for the explanation :)

I know what orthogonal means (well, I know orthogonal vectors are perpendicular to each other) but how can this be applied to a wavefunction? Thanks!