Hi FS, Here is a little mathematica code snipit that will help solve the problem. It basically implements the logic presented in zapper's posts. It gets the...
... vexer ... does ... do ... I must admit that I am not exactly sure what your point is. Aside from Tom's excellent reply, knowing what "mathematical formula"...
Not to beat this thing to death, but Zapper is quite correct. In physics, real problems rarely involve straight applications of formulae -- usually, there is...
One of the main arguments from one of the early references to Laughlin against the existence of a "theory of everything" and reductionism is the existence of...
Hi. I'm a new member here. This is an absolutely FANTASTIC site. I hope the moderator/originator continues to find time to keep it going. I won't have much...
... I ... welcomed, ... - ... Thank you, and welcome! If you like this site before, you are going to LOVE it even more after this. Since you're setting up...
... a ... enter ... in ... focal ... want ... In ... anything ... Misc. ... Thanks Zz. I downloaded the free Winlens 4.3. Looks like it will take a while for...
I have to say it honestly: it was hard. I was thinking that I was getting used to work in english. But I couldn't understand all the parts, and it was long and...
... Shaving?! ... The linear relationship between the forward bias and the photocurrent is nothing more than Ohm's Law (V=IR). So this asymptotic relationship...
We had a lot of "interests" in the last vexer, but only a few sent in the correct answer AND explanation. ... At first glance, one expects that there will be...
OK, this time we will test your quack-busting ability! Over the history of human civilization, there has always been these purported inventions and claims of...
... What you can do depends on what you have, or plan to have. So what do you have already? ... But ... I think I'm a bigger tennis junkie than you! I recorded...
We frequently encounter students asking various homework problems in our IRC channel. Inevitably, the single most common request we encounter is "what formula...
We are very close to counting down the Physical Review Letters #1 most cited paper as reportee in the APS News. This month, it is the #2 most cited paper from...
The American Institute of Physics (AIP) has just released the statistics on the number of high school students in the US enrolling in physics classes. It...
Continuing with one of our ongoing series, this posting adds another experimental evidence regarding the validity of one of the postulates of Special...
It is interesting (coincidence?) that the week that the most accurate verification of the isotropic nature of c is published in PRL, another experimental...
Hello all, After ocasionally visiting the Undernet physics channel, I decided to sign up here, for now mostly because of a rather selfish reason: I was...
Hi Undernet-ers, It may be helpful to briefly explain what z. wrote below, especially with regards to the "superluminal" travel. It is more straightforward to...
hi, one book i can recommend is Born's "Mechanics of the Atom", its a quite old book, but it covers the basics quite well, and even if you dont need it for...
... you ... called ... the ... Well, to bring you and everyone else here up-to-date, Sebastiaan and I had a nice chat on the IRC on varous texts that are being...
Hello Nemor, ZapperZ, Thank you all for your suggestions. Indeed, ZapperZ recommended the book written by Eisberg which seemed a good idea to me because it ...
We need to brush up on our quack-busting abilities here, folks! ... in ... a ... ramp. ... The answer of course is that if the magnet was strong enough to pull...
This vexer is in the same vein as the familiar crossing-river puzzles. See if you can solve this variation. During the Undernetphysics Group stampede to the...
OK, we have never dealt with this type of topic on this group before, but we do not live in a vacuum, and so here it is. The American Physical Society has...
So this is a little early even for an advance notice, but 2005 has been designated as the World Year of Physics. It coincides with the centenial of Einstein's...
This site, hosted by Oregon State University, has some of the most extensive (and growing) collection of materials on radioactive decay, radiochemistry,...
Hey ZapperZ! Reading what Bob Park has to say in his column from time to time (What's New with Bob Park, for those who don't know, www.aps.org/WN/), I...
Hi Group, I'll be taking my first "proper" QM course this fall, and I'm a little worried about our choice of textbook for the class. We will be using the...
Oookay... People must still be on vacations or something... ... grown ... vexer, ... that ... The two children row to the other side of the river, and one of...
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