[QUOTE=Cooty;39819363]Word does everything you need it to if you're competent[/QUOTE]
LaTeX is way faster and also a lot more flexible with formatting equations. I had to fuck around with the equation for the godel metric like 20 times while I was tying up a report on him since Word kept deciding to change the formatting every time I loaded. LaTeX would have worked just fine.
[QUOTE=JohnnyMo1;39826485]LaTeX is way faster and also a lot more flexible with formatting equations. I had to fuck around with the equation for the godel metric like 20 times while I was tying up a report on him since Word kept deciding to change the formatting every time I loaded. LaTeX would have worked just fine.[/QUOTE]
You could always write a reference page with equations in LaTeX, and just superscript[sup]11[/sup] for references.
[sup]11[/sup] Like this..
In an introduction to three dimensional quantum mechanics, I've run into a problem to find the stationary states of the infinite square well in three dimensions. I've gotten as far as an equation that I can solve when the RHS is zero (I've seen that form in some Laplace equation problems in electrostatics), but I don't know how to approach it when there is the constant on the RHS. It may be that it's something straightforward that I've just got a mental block about, or I'm tackling this from the wrong angle.
For clarification, I am treating the potential as 0 if x, y and z are between 0 and a, and infinite if any of them lie outside this region.
[IMG]http://latex.codecogs.com/gif.latex?\\%20-\frac{\hbar%20^2}{2m}\nabla^2%20\psi_n%20=%20E_n\psi_n%20\\%20\nabla^2%20\psi_n%20=%20-k^2%20\psi_n%20\textrm{%20with%20}%20k%20\equiv%20\frac{\sqrt{2mE}}{\hbar}%20\\%20\textrm{Considering%20product%20solutions%20of%20the%20form%20}%20\psi_n%20=%20X(x)Y(y)Z(z):%20\\%20\frac{1}{X}\frac{d^2X}{dx^2}%20+%20\frac{1}{Y}\frac{d^2Y}{dy^2}%20+%20\frac{1}{Z}\frac{d^2Z}{dz^2}%20=%20-k^2[/IMG]
[QUOTE=Greenandred;39831972]In an introduction to three dimensional quantum mechanics, I've run into a problem to find the stationary states of the infinite square well in three dimensions. I've gotten as far as an equation that I can solve when the RHS is zero (I've seen that form in some Laplace equation problems in electrostatics), but I don't know how to approach it when there is the constant on the RHS. It may be that it's something straightforward that I've just got a mental block about, or I'm tackling this from the wrong angle.
For clarification, I am treating the potential as 0 if x, y and z are between 0 and a, and infinite if any of them lie outside this region.
[IMG]http://latex.codecogs.com/gif.latex?\\%20-\frac{\hbar%20^2}{2m}\nabla^2%20\psi_n%20=%20E_n\psi_n%20\\%20\nabla^2%20\psi_n%20=%20-k^2%20\psi_n%20\textrm{%20with%20}%20k%20\equiv%20\frac{\sqrt{2mE}}{\hbar}%20\\%20\textrm{Considering%20product%20solutions%20of%20the%20form%20}%20\psi_n%20=%20X(x)Y(y)Z(z):%20\\%20\frac{1}{X}\frac{d^2X}{dx^2}%20+%20\frac{1}{Y}\frac{d^2Y}{dy^2}%20+%20\frac{1}{Z}\frac{d^2Z}{dz^2}%20=%20-k^2[/IMG][/QUOTE]
Call 1/X d^2X/dx^2 = K' with K'=-k^2+ ( all that crap with Y and Z) and solve it for X. Something like that...
Same with Y, I think the eigenvalues for Z will be set if you have X & Y solved.
[B][SUB]Edit:[/SUB][/B]
[IMG]http://dl.dropbox.com/u/17216535/screengrab_20130308192233.png[/IMG]
getting real tired of your shit EPR machine
[URL="http://What we all wish we could write when writing scientific research papers"][url=http://pages.cs.wisc.edu/~kovar/hall.html]What we all wish we could say when writing scientific research papers[/url][/URL]
[QUOTE=sltungle;39819380]The energy-time uncertainty principle is an incredibly interesting notion to me. You can 'borrow' energy from the vacuum as long as it's returned in a time frame that satisfies the energy-time uncertainty principle.
Generates a lot of interesting hypothetical scenarios (as well as actual, legitimate, real ones).[/QUOTE]
Holy shit this sounds interesting. Got anymore of this?
Can you borrow enough energy to overcome the electrostatic field separating two hydrogen atoms, and then pay back with the energy that results from nuclear synthesis?
That's how stars work.
Huh. I thought they just had enough pressure and temperature so that the atoms are simply shoved through one another's electron cloud.
[QUOTE=Nikita;39868490]Huh. I thought they just had enough pressure and temperature so that the atoms are simply shoved through one another's electron cloud.[/QUOTE]
You make it sound kinky.
[QUOTE=Nikita;39868490]Huh. I thought they just had enough pressure and temperature so that the atoms are simply shoved through one another's electron cloud.[/QUOTE]
Fusion is possible ("sufficiently likely") because of quantum tunneling. I guess that the tunneling and the E-t uncertainty are sort of interchangable?
The pressure and temperature help of course, but it's the quantum physics that actually explained as to why stars are possible. Classically the pressure and temperature were predicted to be a lot higher than observed.
Can someone who is [I]qualified[/I] to discuss quantum physics give me a no bullshit answer to a question?
Can quantum entanglement be used, with out current understanding of physics, to transmit meaningful data?
[QUOTE=download;39886643]Can someone who is [I]qualified[/I] to discuss quantum physics give me a no bullshit answer to a question?
Can quantum entanglement be used, with out current understanding of physics, to transmit meaningful data?[/QUOTE]
[URL="http://facepunch.com/showthread.php?t=1253194&p=39886940&viewfull=1#post39886940"]May I direct your attention..[/URL]
[QUOTE=Bradyns;39887061][URL="http://facepunch.com/showthread.php?t=1253194&p=39886940&viewfull=1#post39886940"]May I direct your attention..[/URL][/QUOTE]
Nice to get my question answered. :v:
[QUOTE=download;39887243]Nice to get my question answered. :v:[/QUOTE]
Just read : [url]http://en.wikipedia.org/wiki/Superluminal_communication[/url]
:|
on what grounds
just admit
it's a fucking mess
[QUOTE=Yahnich;39895024]dude if it works it works, your mom ain't pretty but she got the job done didn't she???!!!!!
[editline]13th March 2013[/editline]
i'm sorry[/QUOTE]
He will have to post pictures before we can make that claim.
Question: A student is reading a lecture written on a blackboard. Contact lenses in her eyes have a refractive power of 57.50 diopters; the lens-to-retina distance is 1.750 cm. (a) How far (in meters) is the blackboard from her eyes? (b) If the writing on the blackboard is 5.00 cm high, what is the size of the image on her retina?
[QUOTE=Yahnich;39894554]"the standard model is already skepticism-evoking as fuck by itself. what physicists were really hoping was that the higgs boson could be disproved so we can have a little more incentive to theorize past the (provisional) patchwork that is the Standard Model."
'it's skepticism-evoking"
"skepticism-evoking"
because accurately predicting like 6 particles before we found them isn't proof enough that the standard model is more or less legit until we can improve it to a GUT or TOE[/QUOTE]
They're right to be sceptical! The SM is far and away the best we got, but it isn't by any means a good descriptor of even the particles we do know - all kinds of effects like CP violation and non-perturbative QCD aren't in it right now.
However, if they want to be a prat about it, let them come up with something better :)
I just received a number of Science for no reason. I feel special.
Does anyone know of a decent graph maker? Trying to plot a Stress/Strain graph for three different springs (on the same graph preferably) and excel is just crap.
[editline]16th March 2013[/editline]
Note: I am gonna draw them out by hand at some point but I won't be able to get my hands on some graph paper till Monday and I want to check the trends.
Found a free trial of DPlot that did the job, handy excel add-in. But thanks anyway, matlab looked a bit too advanced for my shitty A2 practical (that was for geology actually)
[IMG]http://i48.tinypic.com/16kc5ua.gif[/IMG]
[QUOTE=Mr._N;39860065][URL="http://What we all wish we could write when writing scientific research papers"][url=http://pages.cs.wisc.edu/~kovar/hall.html]What we all wish we could say when writing scientific research papers[/url][/URL][/QUOTE]
I think I'm about to resort to this kind of shit for my current assignment...
[img]http://snag.gy/vaixs.jpg[/img]
That's (meant to be) a gamma ray spectrum for Al-28 (irradiated by an Am-Be neutron source) that I took in my last week after correcting for background radiation. This makes NO fucking sense in the least. NEGATIVE counts? The background was STRONGER than when the source was added?! What is this bullshit?!
Not to mention that the fucking photopeak is almost nonex-fucking-istent. See those two little dots in a vertical column somewhere between 1500 and 2000 keV? THAT'S MEAN TO BE A BLOODY PHOTOPEAK! HOW THE HELL AM I SUPPOSED TO SUM THE AREA UNDER THE PEAK?!
All that time spent around a fucking 37 GBq neutron source for what? Shit data? Go to hell, americium, beryllium and aluminium!
[editline]18th March 2013[/editline]
This is potentially the ugliest set of data that I've ever managed to acquire for anything ever.
[editline]18th March 2013[/editline]
[img]http://snag.gy/RjRTb.jpg[/img]
Universe, this is the shit I want from you! Not that other bullshit!
Take that, experimentalists.
In rated news, I talked to the string theorist in my department today and he doesn't do research projects with undergrads. :( Because we wouldn't be able to understand a fucking thing yet.
[QUOTE=JohnnyMo1;39959227]Take that, experimentalists.
In rated news, I talked to the string theorist in my department today and he doesn't do research projects with undergrads. :( Because we wouldn't be able to understand a fucking thing yet.[/QUOTE]
I'm studying applied physics technically but I imagine I'll swap to theoretical for my Ph.D.
How do you get a string theorist off your porch?
[sp]Pay him for the pizza.[/sp]
[QUOTE=sltungle;39961893]I'm studying applied physics technically but I imagine I'll swap to theoretical for my Ph.D.[/QUOTE]
I'm hoping to change from astrophysics to general physics for grad school. There's just about no chance that I'll get a job that has something to do with space.
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