Recent content by Mr.Brown

Hi, Im learning about gaussian integration right now but i can't really find anything about the error approximation other than that it goes proportional to the 2nth derivative of the function at some point in the interval I am trying to integration the function over. But that doesn't really...

Hi, I´m preparing a paper on ARPES and wanted ask what the main applications of ARPES are nowadays? I already understand that high temperature superconductors are one main region of interest but what else ? Thanks

yeah i guess completing the prediploma would be the right thing to do but i hate numerical computation lab so much :D No seriously you´re right i guess having my prediploma still allows me to continue maths one day if i really want to :)

Well it´s pretty easy to show what the maximum speed is: You know on any orbit that the gravitational force inwards to the sun has to equal the radial force in order to keep the object on the orbit: m... Mass of the object M ... Mass of the sunSo: G \frac{m \cdot M}{r^2}=\frac{m \cdot v^2}{r}...

No it´s not possible as you easily see from Newtonian mechanics when you try to calculate what radius such an orbit would have try it :)

Hi I´m a bit in a dilema at the moment : I started studying at Technical University of Munich ( I am German btw) 3 semesters ago and thanks to not sleeping working all the time i compled nearly 6 semesters worth of physics and the standard curiculum in math for the three semesters. Now I am...

erm the kinetic energy of a rotation is 1/2I*w^2

similarity means just the same up to scale hence all angles are the same but the lenghts are different.

cool thanks :)

Hi i got a short question if i know the following U238 decays spontaniously to 2 Neutrons and Tellurium136 and some other isotope. How can i tell what other isotop is produced. Sure i know about baryon number conservation lepton number conservation can i just say ok i got 238 baryons on...

i guess there´s pretty few group therory stuff you won´t be able to gasp not knowing ring therory. Maybe it´s a good idea to have some knowledge of the integers mod n but even that isn´t that cruicial in my opinion i don´t really see a problem taking groups without ringtheory, while ringtheory...

I guess one important point here is that it doesn´t make much sense to talk abount spins higher than 2 in any elementary particle field as for example is pointed out in weinberg vol. 1 ( the chapter about infrared behaviour), as they seem to have any interactions only in the very high energy...

you could use l´hospital on the logs to make it rigorous be the derivative quotient would be n^-1/(n+1)^(-1)=1+1/n goes to n as n goes to infinity :)

Yeah i guess Coleman-Mandula-Weinberg puts some pretty servery restrictions on what can be done and what can´t.

you just have to take into account all the conservation laws don´t you ? But that´s no simple criterion at all ?