Recent content by res3210

Hey everybody, I am looking to solicit some information from those who might know. I have been poking around here to see what its like for an undergrad to possibly apply to UK grad schools for physics, and all the posts I find give the answer 'not good.' I was wondering if it is still like it...

Hey guys, I have been interested in formalistic mathematics for a while, about a year now. Every time I read a formalistic book on math (Principles of Mathematical Analysis by Rudin is a great example) I never understand how mathematicians develop the structure they present in the books. And...

Hey guys, I'm puzzling a bit over an example I read in Rudin's Principles of Mathematical Analysis. He has just defined least upper bound in the section I am reading, and now he wants to give an example of what he means. So the argument goes like this: Consider the set A, where A = {p}...

Of course, it is because the electric field points radially outward, which is experimentally verified. So I suppose we assume the same thing for H. If we see that it behaves electrically equivalent to an electrically charged sphere, then that should lead us to the spherical geometry conclusion.

Hey guys, I was looking at both the time-dependent and time-independent schrodinger equations, and I notice that we often choose to solve these in spherical coordinates. I understand that we do this because they are convenient for problems with azimuthal symmetry. However, how do we know that...

Sorry about that, I am typing from my smart phone, and I don't know how to use LaTex from this interface. Mainly because I'm not familiar with LaTex. If you know any good sources where I can learn it, I'd be willing to use it.

Hey everyone, I'm not sure if this belongs in the math or physics section of this forum, but I figure since my question is more related to the mathematical manipulation of what I am dealing with, I figured I would ask it here and then if it has to be moved, it can be. My question has to do...

So does the current start by flowing into the base of the transistor? Either that or the emitter? It looks like there is tunneling involved with the electrons in the emitter, as they have some probability to be absorbed into the base, or diffuse across the base into the collector. What I am...

I'm fairly familiar with inductors, but I just don't understand how the AC current is generated in order to cause induction.

Hey guys, So I built a circuit a little while back using a flyback transformer and a 2n3055 transistor. Basically it just gave me a massive hi voltage output an I saw little inch long plasma arcs. If you guys need a circuit diagram, I can send you the link or just post it here. The main point...

Ah I see! So the claim is that we are not wholly sure that the laws of physics which governed the Big Bang are necessarily the same ones which govern out current universe (as far as we know). I'd say that is a fair enough assumption. Can we assume nothing about that event then? I suppose we...

What do you mean that energy is not globally conserved? When you say that spacetime is locally flat, do you mean that I can think of it as a non-distorted Cartesian coordinate system?

That's a really good point actually, I didn't even think of it!

I'm sorry you feel that way. What do you think the Big Bang was?

Hi all, I was talking to my professor about the black hole information paradox, and all of this got me to thinking about something: Why do you think the conservation of energy is so vital to the existence of the universe? Suppose we didn't conserve energy, but actually lost it in very...