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/sci/ board - Science & Math - November 2014

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Most viewed threads in this category

based crystals

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Gimme some pics of crystals
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i dont believe in complex numbers. sure, i can come up with some letters and additional dimensions too, that doesnt make it real.
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I just found this study: http://www.sciencedirect.com/science/article/pii/053155656990014X >The life span of 28 male rats given an opportunity to mate at least once a week has been compared to that of their unmated littermates. The mean life span of the two groups was 734 and 578 days, for the mated and the unmated groups, respectively Mating lengthens lifespan. I wonder if this is true for humans and if masturbation has related effects...?

Length contraction

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Have a question on length contraction. >According to a certain road map, the distance between Baltimore and Philadelphia is 160 km. However, if you travel from Baltimore to Philadelphia at a significant fraction of the speed of light, the distance between the two cities will be much shorter than it is if you travel at 100 km/h So if this is true then does that mean the distance of a light year is not absolute? The speed of light is 299,792,458 m/s. Light that travels for one Julian year (31,557,600 seconds) will cover a distance of 9.460730473e15. I'm going to call this distance D. Now onto my issue, if light travels this distance D at the speed of light, wouldn't length contraction cause light to travel a distance less than D? Any thoughts?

Interaction between 2 life bearing planets in the same solar system

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I was wondering how would 2 species on a different planets in the same solar system interact with each other (having by some sheer coincidence comparable technological progress at the same time). Are there any stories on the subject, and what are your opinions on it? I think that life for them would be pretty much the same until invention of radio capable of reaching each other (since planets would be relatively close, both being in the Goldilocks zone around the sun similar to ours), after that maybe a much faster technological progress thanks to exchange of ideas and drive to claim more space than the other species.
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Sup /sci/, I wondered how you can calculate the maximum amount of the minima (the dark spaces between the light spaces) on an interference pattern during a double slit experiment (given the wavelength lambda is 0.5cm and the distance between the slits 2.2 cm, both waves will have the same amplitude). I have the formulas and all is fine and dandy but I don't have a clue how to go about this.
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Hey Sci, im sitting here at my financial script and i just cant find out what the highlighted symbol means. in this example there are two different machines to be compared in their efficiency depending on the pieces produced. sry, germanfag here :/
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http://dailycaller.com/2014/11/17/shirtstorm-when-the-brilliant-are-hurt-by-casual-marxism/ >This phenomenon seems to be escalating. It certainly requires more and more ludicrous things to classify as “oppressive” in order to stoke its never-ending series of self-legitimating moral panics. If we use rationalism — you know, the system of thought that fucking lands spacecraft on comets – we can guess that Taylor’s shirt choice came from social awkwardness or idiosyncratic fashion sense. The fact that this occurs so frequently and so uncritically is startling. The irony of the casual, invisible sexism crowd is just how casual and underreported their Marxist praxis is.his phenomenon seems to be escalating. It certainly requires more and more ludicrous things to classify as “oppressive” in order to stoke its never-ending series of self-legitimating moral panics. If we use rationalism — you know, the system of thought that fucking lands spacecraft on comets – we can guess that Taylor’s shirt choice came from social awkwardness or idiosyncratic fashion sense. The fact that this occurs so frequently and so uncritically is startling. The irony of the casual, invisible sexism crowd is just how casual and underreported their Marxist praxis is.
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So, how long until cloaking technology actually exists? https://www.youtube.com/watch?v=ddVEFQq819o
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Can gravity be converted into usable energy? Gravity obviously keeps entire planets in orbit so is there anyway to harness that power?
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How is 800 / 8 = 100? I get that there are 100 8s in 800, but how come you divide 8 by 8 and then put the 00s to the right? You're dividing 800 by 8, not 8 by 8.
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Any geologists here? Undergad here. Im combining my two final projects in glacial geology and remote sensing. I need to choose three glaciers in the same general area with similar properties, but different lengths and high fluctuation of ice thickness throughout the last ~50 years. Id like to document the correlation between size, ice thickness, and response rate. Due to high availability of remote sensing datasets in North America, id like to stick with Alaskan glaciers. I need to minimize all the variables that influence response rates in order to collect more accurate data as well, so this should take care of climate differences. Columbia and Mendenhall both have extreme ice thickness loss which is best for documenting using ASTER, but theyre relatively different from one another. Im looking for possibly 2-4 glaciers that fit this description. They dont all have to be the same type of glacier, but i think keeping them all valley glaciers would make things easier as well. Any ideas? inb4 >geology >2012 >real science
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>PPE from Oxford >Masters in Economics from London School of Economics >Visiting Scholar at Harvard How much smarter is this guy than you? What's his IQ?
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Mathfags. Help me. I'd put this differently, but I can't think of a close enough metaphor, and this has been on my mind too much. Is there a way to organize The Library of Babel? For those who don't know, it's a library of stupidly huge size that contains every possible 410 page book (every permutation of the million-and-so-on characters.) If you could split up the library and concern yourself with only one language and ignore all 'false' and misprinted texts, how could you divide up the library and put it in order? If books could run on each other like volumes in a set, then it would be like trying to organize texts on every possible subject in varying length and complexity, fiction and nonfiction, stupidly specific accounts of John Smith eating grilled cheese sandwiches, introductory biology textbooks, and a catalog of all subatomic particles at a specific point in time. In short, when given an infinite or simply universe dwarfing number of unique objects, could there be a galactic Dewey Decimal system for it that isn't equally complex?
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Would it be possible to make a pi base system, as apposed to our current base 10? Would there be any advantages to such a system? There are no reputable sources on the subject, even Wiki let me down.
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Aye /sci/entists I'm trying to do some self study and I'm running into a snag. When doing the rational parameterization of the unit circle we get the solution to the quadratic term when solving for x(t) that is \frac{-2t^2 \pm \sqrt{4t^4 -4(1+t^2)(t^2 -1)}}{2(1+t^2)} This then reduces to \frac{-t^2 \pm 1}{(1+t^2)} What I don't understand is how we decide to only take the \frac {1-t^2}{1+t^2} term instead of of the \frac {-1-1t^2}{1+t^2} term from the plus minus as our x(t) parameterization. There must be some bit of logic about the domain/range of the two terms that makes the addition term rather than the subtraction term the correct one but I'm just not seeing it. I'd be really appreciative of any help. This isn't homework by the way I'm trying to do a parameterization of all the conics and then go on to parameterize some specific cubics just for general practice. Pic obviously related
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how did alcohol affect humans? did it play a role in evolution? did it help us develop more evolved brains?
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apparently the air we breather only has a 21% oxygen in it. Would there be any benefits to regularly inhaling a slightly higher concentration of oxygen. like, every night for a couple hours breathe in from an oxygen tank. >pic not related
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ITT: weird/ fucked up experiments https://www.youtube.com/watch?v=KDqh-r8TQgs
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I have a question that I've always wondered about. What other types of life can (theoretically) exist? The more exotic, or different from earth biology, the better. I'm completely ignorant of any sort of advanced biology terms, in fact, I'm not very keen at all about the human body. I do know that most (or more likely, all) living things on Earth are made mostly of carbon, DNA or RNA controls their structures in one way or another, and that we use water as a solvent. I believe this is called biochemistry, right? Correct me if I'm wrong. I'm fascinated by the idea of different 'biochemistries' existing somewhere, but is it really possible, and if so, what are some neat examples?
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