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/sci/ Science & Math

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Most viewed threads in this category

66 more posts in this thread. [Missing image file: 232.jpg]
Cicada 3301 Recruitment puzzle is back. Anybody interested in IT, Cryptography and Freedom of information welcome. IRC: http://webchat.freenode.net/?channels=#33012013 Outguess: http://pastebin.com/KGfE6DVt Dropbox: https://www.dropbox.com/s/r7sgeb5dtmzj14s/3301 CicadaOS: http://www.youtube.com/watch?v=GGMrmsWxQ5E Twitter: https://twitter.com/1231507051321 Wiki: http://uncovering-cicada.wikia.com/ Mural chart: http://mrl.li/X2p8Ry
21 more posts in this thread. [Missing image file: SimpleMutantStrawberry.jpg]
Explain why a polynomial of odd degree must have at least one real zero. This is killing me because I know Descartes' law, and yet I have no idea what the answer to this question is. What is it? A single sentence answer is perfect.
10 more posts in this thread. [Missing image file: models and bottles.jpg]
Hey /sci/, can you give me some tips on finding textbook pdf? Ebookee used to be my to-go place but most of the links are dead now. I've been combing google for hours but couldn't find any of my textbook. Can any of you help out a fellow scientist please? -introduction to molecular thermodynamics by hanson and green -The elements of physical chemistry 6th edition by atkins -Quanta, matter and Change - a molecular approach to physical chemistry by Atkins, de Paula and Friedman -Physical Chemistry-A Molecular Approach. McQuarrie and Simon -Molecular Quantum Mechanics. Atkins and Friedman -Biochemistry 3rd by matthews, van holde, appling and anthony-cahill -the organic chemistry of biological pathways by Mcmurry and begley -Advanced organic chemistry by bernard miller 2nd edition These are some of my txtbooks this semester, PLEASE HELP ;_;
18 more posts in this thread. [Missing image file: monkcat.jpg]
Guys, halp. A cannon fires a cannonball 500.0m downrange at a 45.0 degree angle. At what velocity does the cannonball leave the cannon? This is one a physics review sheet involving a lot of v=d/t type of problems, though most supply the velocity and ask for time. (Easy) I don't understand what to do with this problem, and the answer is already supplied. [70 m/s] I'd prefer to understand how to get to the answer rather that just copy it down, though. Halp Oh, and please define variables in whatever equations and try to make this as clear as possible, please.
6 more posts in this thread. [Missing image file: 1339203955766.jpg]
http://gizoogle.net/tranzizzle.php?search=http://www.4chan.org/sci ITT: Black scientists.
15 more posts in this thread. [Missing image file: QxUDy.jpg]
Do you think it'd be a good idea to try and skew the world population for 75% females and 25% males. Making 3 girls to every one guy? Yay or neh?
24 more posts in this thread. [Missing image file: 6azurite4635.jpg]
what does /sci/ think about majoring in geology?
10 more posts in this thread. [Missing image file: space car motherfuckers.jpg]
Does ASU have a good undergraduate program for astronomy? Just a curious question. And where else do you guys recommend going in the United States for astronomy?
18 more posts in this thread. [Missing image file: 1358349182394.png]
Okay, this is what we have so far. We might have a connection between 4220220 and 332 and it's Decatur, Illinois IF we take the first number as a phone number and the second one as an area code.
49 more posts in this thread. [Missing image file: 1357864145427.jpg]
What are the limitations of building shit in space? Hoe big, assuming you had the resources, could you go before you had structural soundness problems? Are O'Neil cylinder type structures possible?

titrations

1 more posts in this thread. [Missing image file: a-thermometric-titration-281.jpg]
I'm currently doing my AH chemistry investigation on a thermometric titration between HCl and NaOH/ CH3COOH and NaOH, and I need to find some decent sources for background theory. Also, in the guide for the experiment, it just says "make graph with results", which is fine, but then it says "find enthalpy of neutralisation", which I am not sure how to do.
3 more posts in this thread. [Missing image file: A440waves.jpg]
Ironically /mu/ is retarded when it comes to this part of music since it deals more with acoustics than aesthetics. Is there any solid argument for the tuning A432 rather than A440? A lot of it is psuedoscience and correlations but I want solid proof
5 more posts in this thread. [Missing image file: Frechet.jpg]
I am learning french, and i'm wondering if anyone knows of any good french resources. I.e. websites that check grammar, actually good movies in french, french news, ect... Pic related, Frechet is french and discovered metric spaces. So general metric space theorem discussion.
3 more posts in this thread. [Missing image file: advice god.jpg]
Sup sci, been reading about trading recently just want to ask some question.. Is High Frequency Trading hax? How hard it is to start a HFT firm?
0 more posts in this thread. [Missing image file: VeY5N.jpg]
DONE
5 more posts in this thread. [Missing image file: failownedr.jpg]
Hey /sci/, quick question. I need help understanding something from BCS theory: how does one show that the Cooper pair flow is actually dissipationless? The simplest idea that I got is since that there's an energy gap in excitation spectrum the Cooper-pair state simply cannot scatter to anything. Is that it?
2 more posts in this thread. [Missing image file: maths.jpg]
Hello /sci/ Would be awesome if someone spared a minute for this, I'm sure this is very easy for the most of you and this is almost embarrassing to ask. Here is the first stage of a transportation problem that I don't understand, how did my teacher find out what routes to use (PB PC QA QB etc)? Thanks so much
0 more posts in this thread. [Missing image file: 1353795205757.gif]
http://free-energy-info.co.uk/PJKBook.html Anyone want to take a look and talk about this?

Linear Algebra question

12 more posts in this thread. [Missing image file: Linear-Algebra-9780130084514.jpg]
hey /sci/, I was hoping someone here could help me understand an exercise I'm having trouble with. I already have the solution from the instructors manual, but I don't completely agree with a step being trivial, since I'm having trouble proving it. The question: Let U be a linear operator on a finite-dimensional vector space V. Prove that: if the dimension of the range of U^m equals the dimension of the range of U^{m+1} for some positive integer m, then the dimension of the range of U^m equals the dimension of the range of U^k for any positive integer k greater than or equal to m. I think that I can prove this if I can prove that range(U^{p})\supseteq range(U^{p+1}) for all p, since then the range of U^m would actually be equal to the range of U^{m+1}, and I could apply induction to finish the proof. Am I wrong? Is range(U^{p})\supseteq range(U^{p+1}) too hard to prove? It seems to me like it should not be, but here I am. Any pointers to help me out /sci/?
5 more posts in this thread. [Missing image file: Transistor_Count_and_Moore's_L(...).png]
when will this stop?






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