Recent content by Angelos

Hi, I'm learning special relativity with the book Introduction to Special Relativity by R. Resnick, but unfortunately he doesn't provide answers to the questions (not problems). So I would like to aks you if you could correct some of my answers. Homework Statement 1. Can a particle move...

Hi everyone, I'm a junior in Czech Republic and I'm thinking about applying to one of the US' top universities. I really love physics and even though we have a good university here I think that my chances of pursuing career in theoretical physics will increase if I go to the US. One problem...

Well I didn't really think of the situation when the current is decreasing. In that case the induced current would be in the direction of the current. However isn't it true that when I have a circuit with a power supply, switch and a solenoid and I turn the switch on, the current starts from...

Hi, I have just started studying EM induction and I got stuck with the derivation of potential difference across a solenoid when the current in it is changing. My textbook (Physics for Scientists and Engineers by Tipler) derives it in very mathematical way just by saying that because the...

Hi... I have hopefuly simple question, which however drives me crazy... I know how to mathematically derive that infinite line of charge has its electric field inversly proportional to the distance from it and also I know how to derive that infinite plane of charge has its electric field...

Hi...I had never heard about Taylor's polynomials, but I looked it up, when I read your reply and it's a great stuff. Exactly what I needed and how you said - it works. So thanks a lot. I really appreciate it.

[SOLVED] Approximation to simple harmonic motion. Homework Statement A small mass m, which carries a charge q, is constrained to move vertically inside a narrow, frictionless cylinder. At the bottom of the cylinder is a point mass of charge Q having the same sign as q. Show that if the mass m...

Ok. I'm sorry for that. As you might expected I don't have any certain sources and so I will try to rewrite my question. Why is it so hard to explain inertia in terms of modern physics? I'm high school junior so I know only classical mechanics and little bit of special relativity. You...

Hi... Many times I have read articles about how strange inertia is and that no theory we have so far can not explain it etc. However I don't see that problem with it. What is so weird on inertia? It seems to me as normal thing that if some reference frame accelerate the particles in this...

Thank you very much for your time. Now I see it and I feel little bit ashamed. Next time I should think little bit more...:)

Hi... I know that this question will be found little bit stupid, but unfortunatly I can't see where I made a mistake. Let's have stick with light sources on both ends. In stick's reference frame the flashes from both sources are simultaneous. In laboratory ref. frame they are not. However...

Hi, I know that this is probably the strangest thing for everyone, who started to think about relativity just few weeks ago, but how should I imagine 4th dimension? Many people say that thay can imagin it etc., but if you ask them for explanation they don't say anything usefull. Or other...

Hi... I have a simply question...Which program is better and why? Maple or Mathematica?

So did I understand correctly that we can talk in special relativity about small change in momentum as well as we can talk about classic mechanics only in small velocities? In larger change in momentum we would have to use general relativity right?

Thanks for the link. I immediately bought this book. It's great, however it contains "only" like 200 pages and the newest edition contains 300. Does somebody know what the new edition contains and the old doesn't?