Recent content by newgate

Any help?

Hi Dave, Now I'm just reading something about interstellar medium ISL and what I find is that the ISM constituted by gas and dust. The gas is mainly composed by hydrogen and helium and also small quantities of heavy elements! The dust is composed by small grains of solid materials namely...

Hello, Assuming that dust is formed by silicates with Mg and Fe. What is the largest possible silicate dust-to-gas ratio in mass?

Ok thank you very much.

How? I'm curious :D

Thank you Dr.Courtney

Hello guys, How can I evaluate the following integral please? ##\int_{-\infty}^{+\infty}\frac{e^{i A x}}{\sqrt{x^2+a^2}}dx## Thank you

Ok i'll keep that in mind :D Thank you

Ok Orodrui thank very much :)

4 but terms containing ##g^{\mu \nu}.g_{\mu \nu}## come after the calculation of traces! Thanks

I think it's equal to ##\delta_{\rho}^{\nu}##...

Hello, I'm doing the calculation of the unpolarized cross section in peskin QFT and i am facing a little obstacle, after the calculation of two traces i get terms containing ##g^{\mu \nu}.g_{\mu \nu}## and my question is how to deal with them? does this product equal to a numerical value...

Thank you Greg :)

Hi everybody, I am new here. I am very interested by physics and mathematics hope i'll learn a lot from you.