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/sci/ Science & Math

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Most viewed threads in this category

33 more posts in this thread. [Missing image file: rubiks-cube.jpg]
Kinda curious, how many people here can solve a rubiks cube? I know IQ is not an infallible measure of intelligence but I do believe it can somewhat accurately measure your puzzle solving skills. How high of an IQ do you think is required to solve a rubiks cube? Stories?
4 more posts in this thread. [Missing image file: high_voltage.jpg]
An electron acquires 3.45 x 10-16 J of kinetic energy when it is accelerated by an electric field in a computer monitor from plate A to plate B. what is the potential difference between the plates, and which plate is at the higher potential? I got the voltage no problem, but I thought if it's going from A to B then A would have the higher potential? The answer to part 2 is B... Why's that?

college major tier list

13 more posts in this thread. [Missing image file: 1350876980110.jpg]
Top Financial math, accounting, investment banking, actuary studies, mathematics Great Chemical engineering Physics Electrical engineering Computer engineering Computer science Good Mechanical engineering Chemistry Biology Geology Nigga u dumb Any liberal art, fine art, or language Civil engineering
23 more posts in this thread. [Missing image file: 1349724879886.jpg]
Hi sci, i have a problem converting this: Define T : M2x2(F) --> M2x2(F) by T(A)= At. Compute [T]?. the answer is a 4x4 matrix. Now when i plug in the 4 elements of the standard basis i end up with four 2x2 matrices.. How can i convert them into columns?
6 more posts in this thread. [Missing image file: dynomite.jpg]
I think i'm addicted to nasal spray. What can I do to keep my nose less dry?
2 more posts in this thread. [Missing image file: intelligentdesign.jpg]
Intelligent design proponents claim that design can be inferred in living systems from irreducible complexity, the idea that there are systems comprised of interdependent parts and cannot be deconstructed. I can't think of a better example of such things evolving than Lenski's E. coli. The ability to metabolize citrate in aerobic conditions was developed and could be repeated in his samples but only after a certain generation. The fact that it can only be repeated after roughly the 18,000th generation means that it was the result of multiple and complimentary mutations. This means it's possible to remove a later mutation and the prior mutation it works from in the earlier populations can still be selected for and kept. This shows evolution in a stepwise manner, stacking multiple mutations to ultimately confer one function. http://www.newscientist.com/article/dn14094-bacteria-make-major-evolutionary-shift-in-the-lab.html
3 more posts in this thread. [Missing image file: em_electric_magnetic_propagating_waves.jpg]
Is there EM radiation with a wavelenght equal to the lenght of the universe? How about the planck lenght?
20 more posts in this thread. [Missing image file: img06102011_140309.png]
What is the hardest physics course that you have to take in engineering?
1 more posts in this thread. [Missing image file: front.jpg]
So I'm probably going to be buying some land and building a house within the next year, and I've got some questions about sustainability and alternative building. I'd like to have the electricity come from multiple sources, from solar panels to generator-bicycles, and possibly wind turbines of some sort. I was wondering if it would make sense to also have a generator running on biofuel, and to store some of that in batteries. Also, I'm thinking about a closed water system and wondering what that would take.
12 more posts in this thread. [Missing image file: japan time ruinined.jpg]
with the theory of relativity disabling any FTL capabilitys do you think, that humanity will eventually find a way of producing space tunnel/ wormholes or do you think we will be stuck in are solar system. with the exception of long voyages to proximus
4 more posts in this thread. [Missing image file: images.jpg]
/sci/ could you help me out, i'm currently making the math resit exam which i failed last year in uni. Now everyone there thought the exam was a bit weird but now (for the other students who need to do this for their first time) the prof posted the exam and the answers now I might look real dumb here but this just seems wrong to me: A(20,10);B(60,90);C(120,360);D(200,1000) According to them ?x = x3 ?y = x9 Now I thought it was a bit weird that they didn't use the whole data set given to find ? because they always said we had to but later on they claim that slope is 2 but if i remember my basic math wel then the slope is ?y/?x which in this case would be 3 Could someone please explain to me what I clearly can't see because I simply don't know an answer to their answer :/
19 more posts in this thread. [Missing image file: cybermen.jpg]
/sci/, how does the >>>/r9k/ robot work? How does it manage to manipulate a string and compare it to every other entry on that board ever in like, 2 seconds? How does it do that with images, especially?
12 more posts in this thread. [Missing image file: ecb988b5ebbad7d2582be1e44ef96e1d_1_orig.jpg]
since all of you got assburgers, you should be able to solve this!
5 more posts in this thread. [Missing image file: 1277484863150.jpg]
Guys, can you give me clues on how to do mathematical proofs? I'm really having troubles doing proofs in mathematical analysis. Do you have any personal methods, like writing down the definitions you might need or something? pic unrelated
14 more posts in this thread. [Missing image file: 1343111534834.jpg]
Hey /sci/ This is very random, didn't know where else to go. Guys i'm just wondering if i can get some input. I suffer from bipolar disorder, and have recently applied for university in sydney (bachelor of paramedics). I've sat an entrance test and given them my supporting documents etc; i'm just wondering if i should also submit a ltter from my phychiatrist, Do you guys think this will increase odds of getting in. TL;DR -will letter from pychiatrist help me get into University

Austrian Economics Textbooks

27 more posts in this thread. [Missing image file: 145064_v1.jpg]
I'm currently studying A-level economics, and we start our study of fiscal policy & the effects of government on economies after Christmas. Can anyone please recommend a reading list that gives the Austrian argument? Our textbooks are primarily Keynesian. Thanks, /sci/.

Is my brain full of fuck?

1 more posts in this thread. [Missing image file: eere_pv_vermont.jpg]
I'm looking at two maps from NREL on total solar energy potential in Vermont. http://www.nrel.gov/gis/images/eere_pv/eere_pv_vermont.jpg http://energy.gov/maps/solar-energy-potential Here's my problem: the first map, measuring global solar radiation at latitude tilt is saying most of the state gets an average of between 4 and 4.5 kWh/m^2/day in solar radiation. The second map says (after converting the units, and assuming the starting unit is 375 Wh/f^2/day) the solar potential is 400 kWh/m^2/day! Am I reading these maps wrong, doing my math wrong, or is this data inconsistent? The abstract purpose of this is that I'm trying to figure out on a hypothetical basis if Vermont could generate its total annual electricity demand (5.5bn kWh annually) using only solar energy if it really wanted to.
2 more posts in this thread. [Missing image file: s_n28_0602011-.jpg]
Computer Science is the best science ( ?° ?? ?°)
5 more posts in this thread. [Missing image file: 1338550851935.jpg]
I'm confused. KMnO4 + H2O2 Do you get H2O or H2 + O2?
5 more posts in this thread. [Missing image file: kasparov-deep-blue-game-6-1997.jpg]
What major should I go for if I actually want to learn COMPUTER SCIENCE.

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