Recent content by msaleh87

Homework Statement For a system A consists of two parts A' and A'' which interact only weakly with each other, if the states of A' and A'' are labeled respectively by r and s, then a state of A can be specified by the pair of numbers r,s and its corresponding energy E_{rs} is simply...

In the E-k diagrams for a semiconductor material,what exactly is k? -is it just the quantized quantity in the bloch theorem :ψ(x+a)=exp(i.k.a)ψ(x) -is it the wavevector of the electron wave -does it determines the direction of the motion, i.e a given k corresponds to motion in a certain...

ok firstly note that the axis are reversed "X axis is pressure and Y axis is volume" the problem is in the last row in the table how to find the work "the area" under the curved path RP Appluing the second law but for the whole process: ΔU=W+Q here ΔU=o for the whole process Q=...

I think I have found the solution It is not by counting squares

Homework Statement A fixed mass of an ideal gas undergoes a cycle PQRP of changes as shown in the following figure: Some energy changes during the cycle PQRP are shown in the following figure Complete the Figure Homework Equations Find the work done on gas from R to P The Attempt at a...

Hi all, It is the first time to post in your forum. While applying for post grad studies, some colleges require a motivation letter while others require a statement of purpose. so, are the letter and the statement the same? Thanks,

Hi all First of all, I don't know whether this is the right sub-forum to post at, so forgive me if it is not. I have recently been asked to establish a modern physics lab for university students at sophomore level, so what experiments do you suggest to found the lab. I've included the...

Hi all, It's my first time to ask a question here I am now taking a Thermodynamics course and I have the authority to choose what topics to study in this course. My intention is to be able to study statistical mechanics afterward. So I need thermodynamics that will be useful when studying...

Dear brother, I am also like you studying Solid State Physics from Kittel's book. There are a lot of things in this book that I am unable to understand. So, I searched the internet for the best Solid State book. Doing that, I came up with the following books and the following readers' opinions...