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/sci/ Science & Math

Threads added between 2013/08/07 and 2013/08/14

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Most viewed threads in this category

79 more posts in this thread. [Missing image file: images.jpg]
what's the best adderall alternative that's legal without prescription? adrafinil? noopept? piracetam? come on /sci/
2 more posts in this thread. [Missing image file: Bluehound.gif]
Does anyone know the book "Optimization over Integers"? Is it available as a pdf somewhere?
13 more posts in this thread. [Missing image file: 1366005507144.gif]
Does anybody know what the actual equations are for sin, cos, and tan? No, I don't mean that bullshit (O/H) (A/H), (O/A) that you simply plug into a calculator. I mean, if I wanted to calculate Sin (3/5) by hand, what equations would I do to make that happen?
8 more posts in this thread. [Missing image file: Fotolia_8298828_M_twitter.jpg]
I have become interested in c ognitive and behavioral neuroscience and psychology and I'm interested in reading some books/articles about what certain actions/behaviours mean what. I'm not just interested in applying this in the romantic/relationship world but in my general day-by-day. I have a thirst to know more than other people when it comes to this, to have an edge over them in what comes to how the mind functions. Any reading suggestions?

beyon 3d printing

1 more posts in this thread. [Missing image file: 601492_323597767738385_1003077730_n.jpg]
Where is a site that will present me with options to use nanotechnology products to replicate any known texture?
18 more posts in this thread. [Missing image file: 1375135369764.gif]
Alright faggots, let's see how logical the common /sci/nigger is. Riddle me this: >You and your bitch invite 4 couples over. >Not everyone knows each other. >Anyone who doesn't know each other shakes hands and introduces themselves. >After the big hand shake fest, you ask everyone there how many people they shake hands with. >Everyone tells you a different number. How many people did your bitch shake hands with?
50 more posts in this thread. [Missing image file: gurdon_postcard.jpg]
Which science is harder: biology or particle physics?
48 more posts in this thread. [Missing image file: Observable_universe_logarithmic_ill(...).png]
What lies beyond the universe /sci/? Since it has been said that it is expanding, then the universe is expanding into what? Is the universe making new spaces as it expands?
156 more posts in this thread. [Missing image file: WZ_Erwin_Schr%C3%B6dinger[1].jpg]
>yfw casuals are acting like they knew who the fuck Schrödinger was before google put his cartoon up today
24 more posts in this thread. [Missing image file: ERt9ACR.gif]
The other day I accidentally wrote a number theory problem that nobody I know can solve. Can you guys solve it please? Find all integers a, b such that a^2+b^2 is a square (pythagorean triple) and that (a^2+1)/(2a^2+2) is the square of a rational number (eg. 4/9, 8/18, 1/25 etc.) pic unrelated I would be so grateful if you could solve this.
215 more posts in this thread. [Missing image file: image.jpg]
What does /sci/ think about this? >http://www.youtube.com/watch?v=AzE_IHGUssY Apperently, the Egyptians couldn't have built the great pyramid using their technology. It also shows the mathematical beauty of it(pi and the golden ratio appear often), which is contradictory to our current beliefs about Egyptian mathamatics. Also, they somehow knew the meter and were able to make perfectly symmetrical faces on statues using rocks and chisels. I just want an engineers perspective of this.

Solar system

8 more posts in this thread. [Missing image file: Space-Art-Wallpaper-space-7076586-1(...).jpg]
Hi /sci/. I'm writing a novel which includes highly modified Sol. Sun is 14% lighter, Moon's (52% lighter) orbit is circular perpendicular to the line between Sun and Earth and Jupiter, its year is as usual 28 days. Earth orbit is circular and it's in L1 Lagrangian point of Sun-Jupiter (kept stable). I tried to make a program that predicted when the Moon is visible, but it turned out quite complicated. Are there any tools to do it easier? Any tips, at least?

Babby problems

8 more posts in this thread. [Missing image file: 550x486xgtfo-im-doing-science-naked(...).jpg]
p-please help /sci/ I'm struggling with a few differential equations questions and would greatly appreciate some guidance. So i'm trying to find equations in terms of Q dQ/dt=(m-n)Q , m=0.1, n=0.06, Fairly certain I ended up with the right thing Q=200e^t/25 My actual trouble was with the DE: dQ/dt=(m-n-kQ)Q , m=0.1, n=0.06, k= positive constant Any points in the right direction would be greatly appreciate. And yes, I already know this is sub-babby tier.
14 more posts in this thread. [Missing image file: Hairstyles_for_Balding_Men_4.gif]
What can be done for it? I hear taking DHT suppressors works/slows it down.
4 more posts in this thread. [Missing image file: Planck2.jpg]
Which scientist do you believe has the classiest glasses and has made significant scientific contributions to STEM pursuits? >pic related My nigga Planck.

incredible stupid question

4 more posts in this thread. [Missing image file: sin.png]
if you move the point M along the AC line, then the lengths of BM and MA changes, which means that sin, cos, and tan of angle A also changes, even if the angle A is the same all time. I feel like an idiot now for not understanding what's wrong.

Some spaceflight news

8 more posts in this thread. [Missing image file: grasshopper_day.jpg]
http://www.youtube.com/watch?feature=player_embedded&v=2t15vP1PyoA Maneuverability is the them for this video.
15 more posts in this thread. [Missing image file: 12386361-high-tension-line[1].jpg]
can high-tension lines cause cancer?
15 more posts in this thread. [Missing image file: Capture.png]
How do you deal with this shit /sci/, people who say the earth is young
1 more posts in this thread. [Missing image file: sqc.png]
How would you solve this ?






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