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The Unofficial Homework Help Thread

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LoathesRaisins
Posts: 3612 - Karma: 4,735
If you need help with any of your homework post it here. Maybe someone here can help you with it.
Sep 17 2012 10:10PM
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Arabian
Posts: 667 - Karma: 880
Oh, and I forgot - there's no need to specify "Euclidean Space". Vector spaces only ever occur in Euclidean space. It makes more sense to say n-many vectors in R^n, or n-dimensional vector space.
Mar 11 2013 11:11PM
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FuckAllOfYou
Posts: 3864 - Karma: 2,518
It was tsar Nicholas II, the romanovs. They were overthrown in 1917 and later executed by the new gov.
Mar 11 2013 11:39PM
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DrZoidberg
Posts: 5675 - Karma: 4,268
Related to eigenvalue equations by any chance? We're starting quantum in p chem, haven't found out where those come into play yet.


Mar 11 2013 11:54PM
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himay5
Posts: 208 - Karma: 174
I can offer some help with Spanish if anyone needs it.
Mar 11 2013 11:54PM
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*ninja*
Posts: 2108 - Karma: 1,143
what does Holla mean? im stumped
Mar 11 2013 11:55PM
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Arabian
Posts: 667 - Karma: 880
Yes Eigenvalues are solutions the equation Ax = \lambdax, or, more succinctly, the time-dependent growth or decay of a set of vectors, and those vectors for which we solve by solving for Ax = \lambdax given our eigenvalues that are in the direction of Ax are the eigenvectors. Eigenspaces are simply the composition of eigenvectors into an nxn matrix.
Mar 12 2013 12:03AM
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DrZoidberg
Posts: 5675 - Karma: 4,268
Makes sense, and he did say we're going to do some matrix stuff. Shit's interesting, I need some time to sit down and read it more. I should be calculating some stuff right meow...

So math/computer people, equation editors, what's a good one? Preferably free, that I can download. Needs to do all the fancy stuff, then allow an insertion into a word processor, so I don't have to spend an eternity entering them in ms word.
Mar 12 2013 12:31AM
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Arabian
Posts: 667 - Karma: 880
Texmaker is the gold standard, but Word2012 has a fine equation editor built in.
Mar 12 2013 12:32AM
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NotoriousT.S.E
Posts: 1014 - Karma: 439
Anyone good at statistics? I'm on the probability chapter and i'm stuck on a few questions that seem pretty easy, i just cant seem to figure them out.
Mar 14 2013 10:43AM
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chicken
Posts: 6843 - Karma: 2,122
Don't use word. Learn LaTeX. I just threw this together in less than 10 mins to demonstrate.

This is what your work enviroment looks like:

Click for larger image

Trust me, it's not as complicated as it looks.

This is what you get out

Click for larger image

The only disadvantage to using latex is the learning curve. If you already typset equations using LaTeX then you will make stuff faster than word on your first go. It will only take you a few articles before you are working more efficiently in LaTeX. It takes care of EVERYTHING. Separating your document into sections, numbering sections, equations figures, etc. cross refrencing figures, citations. There is just no comparison between word and LaTeX.

The best part though is that you don't need to dive in headfirst. With exams coming up and stuff you probably don't want to waste time learning LaTeX right now.However you can get (most) of the benefits of LaTeX and still have a childlike environment similar to word. All you need to do is download "LyX", it's totally free. Then you can drag word to the trash because you will never use it again.

haha I can't believe I just wasted like 15mins doing that. I really have no life.
Mar 14 2013 12:44PM
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DrZoidberg
Posts: 5675 - Karma: 4,268
I think I'll have time next week to do stuff, I have a huge winter break so my exams aren't till the end of may almost. My spring break starts next week, the 22nd or something.

If anybody wants to help me analyze IR and proton NMR spectra though... I was dumb and waited till the last minute, lab report is due at 6 today.
Mar 14 2013 12:53PM
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chicken
Posts: 6843 - Karma: 2,122
oh and arabian already mentioned TeXmaker which is just a program to help you work even faster. it can do things like showing your document structure and giving advanced syntax coloring and automatic completion and stuff.
Mar 14 2013 12:55PM
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chicken
Posts: 6843 - Karma: 2,122
I've got a paper due tonight as well. probably shouldn't have wasted my time doing that haha. it was over breakfast though. logging off now.
Mar 14 2013 12:57PM
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steep
Posts: 6063 - Karma: 297
This thread still in use? I'm stuck on 2 physics problems. I missed the class we went over this.

1. The magnetic force on a straight wire 0.30 m long is 2.6 x 10^-3 N. The current in the wire is 15.0 A. What is the magnitude of the magnetic field that is perpendicular to the wire?

Is the formula for that one ^ F=BIL ? But it would B=IL/F? Could be wrong.

Next one:

2. An electron moving perpendicular to a magnetic field of 4.60 x 10^-3 T follows a circular path of radius 2.80 mm. What is the electron's speed?

Any help is appreciated. I realize these are pretty simple but I'm lost. Fuck missing school lol
May 12 2013 5:53PM
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Loco-Deer-Slayer
Posts: 1400 - Karma: 675
look at this again...
May 12 2013 5:59PM
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steep
Posts: 6063 - Karma: 297
My friend sent it to me from his notes. I have no clue lol
May 12 2013 6:01PM
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Loco-Deer-Slayer
Posts: 1400 - Karma: 675
B=F/IL had the inverse there
May 12 2013 6:10PM
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LoathesRaisins
Posts: 3612 - Karma: 4,735
bump for school start
Aug 28 2013 1:25AM
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LoathesRaisins
Posts: 3612 - Karma: 4,735
Bump
Oct 4 2013 1:44AM
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