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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
1 more posts in this thread. [Missing image file: maxminthermo.jpg]
How do minimum (alcohol) and maximum (mercury) thermometers work? Here is one definition I found for minimum thermometer: >"The liquid used in minimum thermometer is alcohol in which a dumb-bell-shaped index is set. When the temperature falls, the alcohol column drags the index towards the bulb end but when the temperature rises the alcohol column expands and runs past the index without disturbing it. Thus the end of the index farthest from the bulb gives the lowest temperature attained in a day." How does it drag the index? And why doesn't it move the index when it expands? Is there some kind of animation anywhere. I couldn't find anything on Youtube. -- Maximum thermometer: >"Maximum thermometer is also a mercury-in-glass thermometer having a constriction near the bulb end. When the temperature of air rises, the mercury in the thermometer expands and forces its way into the stem past this constriction. But when the bulb cools none of the mercury above the constriction will get back into the bulb and then the length of the mercury remains the same. The end of the mercury thread farthest from the bulb registers the highest temperature reached in a day." Why can't mercury go back down past the constriction when it cools down? Why is the maximum thermometer slightly tilted? Wouldn't the expanded mercury past the constriction point go back down to constriction point when it cools down?
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 ;_;

What's so bad about INFPs?

63 more posts in this thread. [Missing image file: wwswq.png]
So, I'm a medical student, but I'm also an INFP, a friend of mine seems to think this means I'm destined to fail at medicine. Why? I'm not sure what the NF means, but my friend was able to explain about perceiving and judging and I already knew about introverted/extroverted. That being said, from what I do understand, I'm introverted, which just means I do a lot of extra-research because I'd rather be doing that than socializing a lot of the time. And if I withhold judgment wouldn't that make me good at diagnosis? My friend does neuroscience, so I tend to trust his opinions on these matters, and looking the type up on Wikipedia it thinks I'd make a great writer which, oddly enough, makes sense to me. I never thought of it as a career path but I genuinely do love to write, just for my own satisfaction. If I don't write anything for a while I tend to get grumpy and/or every other thing I say is some sort of pun. Anyway, before this gets any more self-indulgent, what do you guys think? About personality tests? About my personality (doing the test I scored really high on every factor except I, which was 20, everything else was 60+. I dunno what that means, but maybe someone else does?)
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.
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.
9 more posts in this thread. [Missing image file: semiconductor.jpg]
Sup, /sci/. I lurk most of the time here and while this isn't my first time creating a thread, it's the first time I'm asking for your assistance in regards to something school related. No, it isn't homework. I graduated last year with a B.S. in Mathematics and I'm currently in grad school for my M.S. Last semester, I decided to take two undergraduate classes; one in the Engineering department and the other in the Physics. The one in the Physics department was Analytical Mechanics, and the one in the Engineering Dept. was just your introductory mechanics/engineering course for mech E majors. I ended up doing extremely well in both, despite the crazy amount of work. One of my professors asked me if I would be interested in research with him on semiconductors, and I'm wondering if I should. He doesn't know I'm a grad student in Mathematics, just that I took his engineering class and I really, really liked it. For the record, I absolutely love mathematics and I plan on continuing toward a PhD in the field. That being said, however, those two classes opened up a whole new world to me and I just absolutely, positively love it. For my electives, I'm taking a theoretical mechanics course, quant mechanics and an advanced grad-level mechanics course. Solid mechanics or whatever it's called. For what it's worth, I'm thinking of acquiring a secondary M.S. or just taking several more engineering/physics courses. So, here's my question: Have any of you done semiconductor research? If so, what is it like? Can you give me some tidbit of information about it, some advice, etc? Furthermore, what should someone in my situation do? I'm really considering taking more grad level engineering/physics courses just for the sake of enjoyment alone. I enjoy mathematics still, but last semester I felt an enormous amount of joy just being in the class. I was smiling every fucking day I was in class and I felt saddened when the sessions were over.
33 more posts in this thread. [Missing image file: 1320016586517.jpg]
I propose gender segregation in schools. Discuss.
47 more posts in this thread. [Missing image file: large-logo.jpg]
So what does /sci/ thinks of psychology?
1 more posts in this thread. [Missing image file: Diploma%20Mill%20Graphic%201.png]
Whats the story about buying degrees? AS in a degree mill, how big an industry is it. I read about it once. I have a degree already, Plenty infact. But do these actually work?
1 more posts in this thread. [Missing image file: image001.jpg]
Hello, /sci/. Axe is currently holding a contest to send two lucky Canadians to a space camp, as well as a flight that goes up 103KM. This is something that I would really..really love to do. But you need to be voted into the top two. So, I was hoping that /sci/ could lend me a helping hand with this. That would be amazing.. https://www2.axeapollo.com/en_CA/4575/kevin-jacobs
2 more posts in this thread. [Missing image file: planetarium.jpg]
Heyo, I have a sort of weird aspiration for a career in science. I want to work in a Planetrium. What kind of academic jobs could i get at a planetarium? I hold a degree in Physics+Astronomy. What should i do to get into the planetarium scene. It seems to be very hard to get into and i never see vacancies, ever. Any tips My dream would to become Director
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






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