Recent content by lepori

2 reference letters which should evaluate your scientific qualifications for a doctorate at ETH Zurich. Preferably hand in letters with original signatures and complete reference data of the authors. here is in german: 2 Empfehlungsschreiben in denen Ihre wissenschaftliche Qualifikation I am...

yes, it is original english..

I am requarid to submit reference letter with complite reference data (of my recomendator) could you tell me what dose reference data means? Is it just list of publications of something else? o_O

You can, If you kill enough :smile: In Sovie Union all public movement were stopped by killing leaders?.. :)

Homework Statement suppose there is tunnel through the Earth which dose not cross center. If the drop object in this tunnel, how many time it takes to reach end of tunnel? earth is perfect sphere, there is no friction too Giving data: Earth mass and radius Homework EquationsThe Attempt at a...

we have a function: G(t)=cos(x)^2+sin(x)^2*cos(wt) X is angle between two vector, if the vectors direction is random, then averaging over all directions would be yield G(t) = 1/3 +2/3*cos(wt) /////////// I just do not understand, how to get it :)

in fact, my question is - how can I take average over sphere?..

hi, how can I calculate average of cos2x ? I want to take average over a sphere I tried to do like this: <cos2X>= 1/2π ∫cos2xdx and I get 1/2 but in my books, wrote that average of cos2x , taken over a sphere, is 1/3

I solved this problem like that: Molecules in thermal equilibrium have the same average energy associated with each independent degree of freedom of their motion and that the energy is 1/2*K*T A 3D harmonic oscillator has 6 degrees of freedom [3 - 3D movement , 2 - rotational, 1 vibrational]...

Bruce, Bill thank you

hay guys, A three-dimensional harmonic oscillator is in thermal equilibrium with a temperature reservoir at temperature T. Finde The average total energy of the oscillator I have no idea, how can I solve this problem, can you hint me please:rolleyes:

(e1,e8)

(f1,b5)

(d1,e1)

(d1,e1)