Recent content by sltungle

Ah, of course! Thank you very much for the help :)

Is this because the argument of the delta function is the magnitude of separation which is the same regardless of coordinate system? That was my first attempt to solve the problem about 3 day ago but one of the other professors told me he was concerned that I hadn't treated my change of...

1. The problem statement, all variables and given/known data Show that the probability density as a function of seperation, r, of two atoms interacting via a potential U(r) (e.g. a function of separation only, such as a Coulombic interaction), is given by $$\rho(r) = Cr^2e^{-\beta U(r)}$$...

Thanks for the info, f95toli. On your answer to question 2, though; from videos I've seen it appears that you can simply place a chilled type-II superconductor into a magnetic field, let it go and flux pinning will do its thing. Why the need for a spacer, then? I'm thinking of this video in...

I don't know about your university specifically, but my uni has a fairly small, tight-knit physics department so the students and professors all get to know each other fairly well fairly quickly. I frequent just barge into a few of my lecturers offices to chat to them completely uninvited...

Hey, everyone. I'm in my final year of my bachelors at uni and we have a class that's basically to teach us how to set up a research project (among other things). We've already done the lit review, a risk assessment, all of that jazz. The final assessment is to basically produce an...

Nobody? This question is really bugging me. I'd really appreciate the help.

1. Using the parametric solution of the Friedmann equations for a open, dust-filled universe i) Calculate the radius of the Hubble sphere (RH) for a 'dust filled' open universe. ii) Compare this with the radius of the particle horizon (Rp) for the same universe and determine if there exists a...

Anyone? Like I said, even help with one of the sub questions would be really appreciated (especially the last one - I can't see why I got it correct, but my friend didn't).

Okay, this is a long post so buckle up (not sure if this counts as Homework Help or not - technically it WAS homework, but now it's basically exam revision). I was wondering if anyone would mind helping me with a few physics problems I have? It was originally for a mastering physics...

Homework Statement The concentration of the reactant A has been studied as a function of time. By a suitable plot of the data below, show that the reaction is first order, and determine the rate constant, k, and the half-life, t1/2. Use the integrated rate equation to determine [A] when t =...

One last question, I believe. Say I have an object, and in front of it a two lens system (both converging lenses), and the first lens would cause the image of the object to form at infinity: can I just ignore that lens all together and only consider the second lens? Again, I'm trying to...

Most definitely. Thanks a bunch!

Yeah, sorry about that. I was trying to explain it without making it overly-complicated. Seems I failed there. Thanks for the info, though! Optics (ray-tracing in general) certainly isn't my favourite part of physics. I'm a lot better at relativity and quantum mechanics, but... it's part of...

If I have an object and in front of it there's a diverging lens, and in front of that (furthest from the object) there's a converging lens can I just ignore the diverging lens when ray tracing for the image formed by the converging lens? I figure if I were able to draw an infinite number of...