# Search results for query: *

1. ### I Discharge voltage of materials for Li-Ion batteries

What do we mean by a discharge voltage of a material ? and is it good to have a low one or a high one ? Thank you.
2. ### B Fourier series of a step function

I want to extract the mathematical function for this graph of voltage response. Could you please help me or guide me in doing that ...
3. ### B Fourier series of a step function

So you mean that I should take each portion appart (where f(x) is constant) and calculate the integral. Then, I add them all together ? Is there any other method where I can calculate Fourier series normally and then I multiply them by another factor which will make them increase or decrease ?
4. ### B Fourier series of a step function

Hello, can we make a Fourier series expansion of a (increasing or decreasing) step function ? like the one that I attached here. I just want to know the idea of that if it is possible.
5. ### Pulse current discharge test of a Li-ion

This is the refference to the article that I'm working with : Huria, Tarun, Massimo Ceraolo, Javier Gazzarri, and Robyn Jackey. "High fidelity electrical model with thermal dependence for characterization and simulation of high power lithium battery cells." In Electric Vehicle Conference...
6. ### Pulse current discharge test of a Li-ion

Could someone please explain to me what is the definition of a pulse current discharge, and what do we mean by pulse current discharge test ?
7. ### A Landau diamagnetism

Thanks sir for your responce, but what I want to know why the term of spin-magnetic field interaction doesn't appear in the hamiltonian of the electron. is it because it is so small in front of the kinetic energy for example ?
8. ### A Landau diamagnetism

Hi, in the case of free electrons gas under the effect of a magnetic field. The hamiltonian of an electron doesn't contain a term of Spin-Magnetic field interaction this means that it contains just the kinetic energy terms. Why is that ?
9. ### A Acoustic and optical branches in phonons dispersion curves

Thank you DrDu.
10. ### A Acoustic and optical branches in phonons dispersion curves

What is the physical meaning of acoustic and optical branches in phonons dispersion curves ?
11. ### A Bose-Einstein statistics

Thank you very much.
12. ### A Bose-Einstein statistics

Is that the original article ?
13. ### A Bose-Einstein statistics

I'm searching for Bose's paper/article that was published by Einstein. Can someone give me direct link to it ?
14. ### A Break points in band structure

sorry, I didn't understand what you have said.
15. ### A Break points in band structure

What do we mean by break points in band structure ? and what that sentence means : "if the band index were chosen in such a way that the energies are indexed in ascending order for any k then break points would appear in the εnk vs. k plot (with n fixed) wherever two lines intersect." ...

Thank you.
17. ### Solid state / condensed matter physics books

Can you give the name of an excited book of solid state / condensed matter physics ( beside kittel and ashcroft ) ? a book than contains more talking about experimental rather than theory

Thanks.
19. ### Best physics journals

What do you recommend for example ?
20. ### Best physics journals

What is the best physics journal for condensed matter physics ? And what is the best journal for all branchs of physics that keeps you on update ? Thanks
21. ### Drawing crystal structure software

Thanks I'll try them.
22. ### Drawing crystal structure software

Hi, is there any software that I can use for drawing a crystal structure from atoms coordinates ?
23. ### Materials and x-ray diffraction

What is the material that doesn't diffract x rays ?
24. ### Understanding C=(2*C5): Elements and Meaning

So 2 C5 means : C5, C54. Thanks you very much that's what I want to know.
25. ### Understanding C=(2*C5): Elements and Meaning

I mean what means the notation of the class C'=(2C5) ,where C' is a class and 2C5 are the elements of this class.
26. ### Understanding C=(2*C5): Elements and Meaning

One of the classes of the group C5v is written C=(2*C5). So why do we mean by 2*C5 and how we can know the elements of this class from this writing ? Thanks
27. ### Optical microscopy image analysis

I just want steps and advices for analysing any solid sample from it's microsopic image. For example Fe-C
28. ### Optical microscopy image analysis

How one can analyse an image of a solid material obtained with an optical microscope ?
29. ### Cristallographic groups

Mod note: This post was moved from a different thread. Why the point group C1h is identical to C1v ? Why the point group C1h with horizontal twofold axis is identical to C2v ? Thanks
30. ### Cristallographic groups

Oh ! I think 1-fold rotation means no symmetry so there is no axis of semmetry. Is that correct ?
31. ### Cristallographic groups

How to draw the symettry axis for 1-fold rotation ? And why C1v is identical to C1h ? Thanks
32. ### Necessary knowledge condensed matter physics

Could someone tell me about what I must have as a knowledge to study condensed matter physics ?
33. ### Solid State Condensed matter books

What is the best book that gives you the essential knowledge for condensed matter physics ?
34. ### Best problems and solutions book in solid state physics

What is the best book in solid state physics that contains problems and solutions?
35. ### Studying Reading physics books

Thank you very much krylov and Zapper Z for your answers. I just want to tell you that I finished my first three years as undergraduate student, now I'm about to start my first msc year in condensed matter physics, but I'm not satisfied with my study method. So I understand from what you have...
36. ### Studying Reading physics books

How to read and understand successfully a physics book in any branch of physics ?
37. ### Understanding Limit Current & Resistivity in Source Meter Machines

OK guys this is an exemple of sourcemeter unit : http://www.es-france.com/produit538/product_info.html , But what I want to know is what means CURRENT LIMIT physically.
38. ### Understanding Limit Current & Resistivity in Source Meter Machines

We see always in source meter machines a LED which indicates the limit current. I want to know what is the limit current and what is the relationship between this later and the resistivity.
39. ### Van der Waals interaction

Now you understand me, and this is what I'm looking for if you can help me.
40. ### Van der Waals interaction

I'm talking about the Coulomb interaction energy between two harmonic oscillator ( two atoms modelised by two harmonic oscillator)
41. ### What you study in Condensed matter physics

I'm allready studying physics of condensed matter, but I want to know if there are some missing modules that we didn't study or something like that.
42. ### Van der Waals interaction

Hello! In Van der Waals interaction, how to prove that : H= - (2*e^2*x1*x2) / R^3 ?
43. ### What you study in Condensed matter physics

Ok so what they are studying in the first three years before graduate school?
44. ### What you study in Condensed matter physics

Hello! Could someone tell me what they are studying in the first three years (undergradute) in condensed matter physics.
45. ### Coulomb to Mev.fm

First of all I'm sorry for the late of replying, Vanhees71 Thank you for the answer you really helped me and ChrisVer I asked a question for you to help me or to correct me if I was wrong, and thank you for you too for the notice.
46. ### Coulomb to Mev.fm

How to prove that e(the charge of proton)=1.6E-19 Mev.fm
47. ### Instrumental spectroscopy

Thanks but I'm searching for physics book not chemistry.
48. ### Instrumental spectroscopy

Hello ! what do you suggest as a good book for instrumental spectroscopy ?