Recent content by NaN089

Thank you for your help. The notes that my lecturer gave had the info that I provided here. I was a bit confused and had to check with someone else. Now I know it was a printing mistake. They need to be in radians. Thanks

Hi, I am a bit confused about the units of L = (0.9λ)/(βcosθ) the Scherrer equation used in powder diffraction. My idea is λ= radiation wavelength with unit (angstrom) β= FWHM with unit (radians) θ= braggs angle with unit (degrees) L= particle size with unit (angstrom) Am I right in...

so the formula will give me the density of electrons and not the density of states of electrons: n(Ec )= Nc.e^(-((Ec-Ef ))/(k.T)) ?? In many books and web pages I found Ea which most probably the energy of acceptors. Is that the BINDING energy of the acceptors? I believe we use this to...

Hey Phyzguy, that is a very simpe and clear explanation of the Density of States and the Fermi Energy. I have got a question that popped in my mind after seeing this reply. Would you please explain the difference between 'density of states of electrons' and the 'density of electrons' of a...

Thanks for your help mark. i corrected the silly mistake that i made in 1, and cracked 2 and 3 with your hints. I'm new in this forum and this is my first post. I have not learned all its features but i will soon discover how to use those symbols. ;p Thanks again for your help. :D

Homework Statement Q1) (dy/dx)= 2x(y2+9); y(0)=0 Q2) (x4+y2) dx - xy dy =0; y(2)=1 Q3) (dy/dt)= 4y+t Q4) y"+2y'+y=0; y(0)=4 and y'(0)=-6 Q5) y"+3y'+2y= 30e2t 3. Solutions found A1) y= tan (x2/3) A2) this is not an exact differential and so cannot be solved A3) couldn't solve this...