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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
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 ;_;
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?

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: 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.
11 more posts in this thread. [Missing image file: 119600981_Mpemba_372841c.jpg]
How the heck do you pronounce Mpemba ? I cant find a single definitive webpage. What the hell?
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: antispiraldna.png]
Is combustion like fusion, or fission? Or its own thing?
10 more posts in this thread. [Missing image file: Esbit.jpg]
What will happen if I eat one of these? I feel compelled to do that for some reason. http://en.wikipedia.org/wiki/Hexamine_fuel_tablet
9 more posts in this thread. [Missing image file: schrodingers-cat.jpg]
14 more posts in this thread. [Missing image file: CMS_Higgs-event.jpg]
Let's say we figure out the God particle/Higgs boson/whatever it's called now to a similar extent that we've figured out atoms: i.e. we have enough info to (relatively) safely use the thing for economic and possibly (who am I kidding, DEFINITELY) military purposes. What is the result of this, in laymen's terms? I try to read about it on Google and all I get are physics and science words that I don't understand. What would the Higgs boson bring to the 99% of the world that doesn't understand the ramifications of simply "We preicted it, we found it, here's a bunch of equations and shit that you can't understand, brb quantum physicists-only circlejerk."

Send Obama as team leader on the Mars One mission!

1 more posts in this thread. [Missing image file: 580x466xObamaMars_580x466_page.jpg]
Guys, for the upcoming mission to Mars we will need an inspirational leader to set foot on the first interplanetary mission and cause a giant leap in human exploration! That is why I would urge you to sign the petition to the US Congress to pass a bill sending Barack Obama on the Mars One mission by following the below link. You can be a part of making this dream a reality. Tell some friends. But not too many. http://www.change.org/petitions/congress-send-obama-to-mars
21 more posts in this thread. [Missing image file: Skærmbillede 2013-01-11 kl. 11.35.34.jpg]
How'd I so /sci/?

Space Elevator Incoming?

18 more posts in this thread. [Missing image file: spaceelevatornice.jpg]
http://news.rice.edu/2013/01/10/new-nanotech-fiber-robust-handling-shocking-performance-2/ http://www.youtube.com/watch?v=4XDJC64tDR0 >“The new CNT fibers have a thermal conductivity approaching that of the best graphite fibers but with 10 times greater electrical conductivity,” said study co-author Marcin Otto, business development manager at Teijin Aramid. “Graphite fibers are also brittle, while the new CNT fibers are as flexible and tough as a textile thread. We expect this combination of properties will lead to new products with unique capabilities for the aerospace, automotive, medical and smart-clothing markets.” >The phenomenal properties of carbon nanotubes have enthralled scientists from the moment of their discovery in 1991. The hollow tubes of pure carbon, which are nearly as wide as a strand of DNA, are about 100 times stronger than steel at one-sixth the weight. Nanotubes’ conductive properties — for both electricity and heat — rival the best metal conductors. They also can serve as light-activated semiconductors, drug-delivery devices and even sponges to soak up oil.
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?






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