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/sci/ Science & Math

Threads added between 2013/06/05 and 2013/06/12

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Most viewed threads in this category

1 more posts in this thread. [Missing image file: 6677660251_2c932e618a_b.jpg]
Pro-tip on how to calculate eigenvalues with a TI 83 or 84 of matrix A with dimensions n x n: make a function: y = det([A] - X*identity(n)) and find the zeros of this function
2 more posts in this thread. [Missing image file: 1370789136749.jpg]
Why aren't there 'brands' for services like psychological therapy?
90 more posts in this thread. [Missing image file: Nature's Prophet after losing (...).gif]
How do I get taller? 5'6'' here and 22 years old. I'm sick of feeling like a child in comparison to everyone else my age, especially around women.
32 more posts in this thread. [Missing image file: tripleintegral.png]
Hello /sci/. I'm looking through an example on triple integrals as shown in my picture, the actual problem is above the line, below is how to solve it. In addition z is between 0 and 4. What I don't understand is, why does the r come in as a factor in the cylindrical coordinate function? By substituting the x with r*cos? and y with r*sin? i get z*e^(r^2), not z*(e^(r^2))*r. What am I doing wrong?
18 more posts in this thread. [Missing image file: 220px-Trotsky_Portrait.jpg]
So after 2 wasted years on Information Systems and 1 year wasted on gaming I decided to stop wasting my time and study the thing I'm passionate about - Physics. I was very good at Maths in High School but since my university was extremely boring to me I just didn't study at all. So at the moment I'm very rusty on the High School maths and physics and I wanna be ready for when the year starts, so I need to catch up. Any quality books,videos or sites on the subjects(high school maths and physics) will be helpful. Thanks alot.

Double integrals in polar coordinates question

1 more posts in this thread. [Missing image file: NooScCX.png]
Can someone tell me how you know that you will be integrating -pi/2 < theta < pi/2 in this problem: http://imgur.com/NooScCX
11 more posts in this thread. [Missing image file: universe[1].png]
Are we in the center of the known universe?

Subatomic materials

3 more posts in this thread. [Missing image file: 1322342910899.jpg]
Theoretically is it possible to build things with subatomic particles directly? I.e., could a block of matter be composed of quarks or strings that adhere uniformly without amalgamating into atoms?
3 more posts in this thread. [Missing image file: IR-stimulation-of-mouse2.jpg]
Hey /sci/, I have a presentation in a Neuroscience-EE subject next week, and I need a topic to talk about. I need a topic that is both in EE and Neuroscience. Stuff like PET/fMRI/EEG/FES and all the other standard bullshit has already been taken, and I wouldn't want to talk about it anyway. So I need your input /sci/, I am up on all the tech news regarding Neuroscience, but I can't find a topic that covers several papers, yet at the same time isn't shallow. Any help or ideas you got is appreciated. I would also love it if you had something CS and Neuroscience related, since I am from a CS background, but it would have to include Biology, since topics like Artificial Neural Networks are not allowed. Pic related, adding extra senses to rats. http://www.kurzweilai.net/neuroprosthesis-gives-rats-the-ability-to-touch-infrared-light

Beal's Conjecture

5 more posts in this thread. [Missing image file: beal.jpg]
If Ax + By = Cz , where A, B, C, x, y and z are positive integers and x, y and z are all greater than 2, then A, B and C must have a common prime factor. Provide a counterexample, win $1,000,000. You should be able to solve this.
8 more posts in this thread. [Missing image file: iq-test-guide.gif]
I've yet to actually try a "legit" IQ test, though I've been experimenting with different questions from varying IQ tests across the web. Do IQ tests really just seem to test pattern recognition and mathematics faculties? Is IQ still a matter of debate, these days?

any good science related books?

3 more posts in this thread. [Missing image file: Galaxy_www.FullHDWpp.com_.jpg]
So i'm trying to expand my book collection (current status = 0). I'm mostly interested in astronomy related books (anything will do, novel strongly related to astronomy or even a cool history book [no textbooks plz]). But if there are any "must reads" in general, I will take them. Thank you
18 more posts in this thread. [Missing image file: Front.jpg]
High school senior here. Fucked around too much and currently failing Pre-calc, final test is tomorrow and I have zero notes written down. How the hell do I solve this? Find zeros of f(x)? f(x)=-5(x-2)^3(x-10)(x+2)^5(x+3)
9 more posts in this thread. [Missing image file: 1310045269525.png]
By what mechanism does subjective experience arise from the brain?
27 more posts in this thread. [Missing image file: 1369553974070.gif]
If two particles are quantum entangled and one falls into a black hole. What happens to the other? Also lets say we make a video camera whos hard drive is made up completely of atoms that are quantum entangled with an exact duplicate harddrive and we throw the video camera into a blackhole and the camera somehow survives and is spewed out in another dimension or time or place and still retains its shape somehow. Could we be able to download whats off the harddrive we kept and see whats in it?
29 more posts in this thread. [Missing image file: cat.jpg]
Do vacuum cleaners work in space?
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What is the best book on probability theory?
114 more posts in this thread. [Missing image file: 1365796956357.jpg]
Are there any ways too increase my IQ, or am I forever destined for a path of mediocrity.
56 more posts in this thread. [Missing image file: hmmm.png]
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I like Christianity and science, but there's one thing that scares me in both disciplines: infinity Am I the only one?






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