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/sci/ Science & Math

Threads added between 2013/01/23 and 2013/01/30

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Most viewed threads in this category

7 more posts in this thread. [Missing image file: 51cwd2m07uL._SL500_.jpg]
Does anyone have a pdf-version of this book? "Foundations of Astrophysics - International edition" by Ryden, Barbara and Peterson, Bradley M. (2011)
3 more posts in this thread. [Missing image file: blackcrazyface.jpg]
Hey /sci/, I could use some help. Im failing calculus right now, and have a quiz tomorrow that could save my life, but have no idea what im doing. I have some practice problems and would really appreciate some help. Here we go, Water flows into a tank at a rate of dW/dt=(1/75)(600+20t+t^2) where dW/dt is measured in gallons per hour and t is measured in hours. if there are 150 gallons of water in the tank at t=0, how many gallons are there at t=24 I have to solve each problem twice, using each method once. first one would be the antiderivative method of plugging in/ solving for a constant and the second is something with f(b)-f(a) pic related, mfw i look at this problem
12 more posts in this thread. [Missing image file: 9gAdk.gif]
Programming question. Just looking for a little guidance. It's in Java. The problem is a de Jager formula, which is w^a \cdot x^b \cdot y^c \cdot z^d You choose any number you want, call it "mu", then you personally choose four numbers, variables w x y and z. The formula asserts that for exponents a b c and d, each can be any number from the array {-5, -4, -3, -2, -1, -1/2, -1/3, -1/4, 0, 1/4, 1/3, 1/2, 1, 2, 3, 4, 5}, can optimize a b c and d to come within 1% error of your randomly chosen initial number mu. I'm not looking for an explicit answer, I just want to make sure I'm not on a fools errand with what I've done. Basically, I've used four loops nested within each other to keep generating a new product using every value combination possible, then if the error of that value is less than the error of the previous value s then that's the new error and that value becomes the new best value. It's not returning the right, optimized value right now. Any insight? Pic related, how I don't feel right now programming

organic chemistry wade 8th edition

9 more posts in this thread. [Missing image file: isbn.jpg]
can anyone please find me a pdf of this book??
3 more posts in this thread. [Missing image file: StarWars2.gif]
My boss whistles a riff from the Star Wars theme over and over, all day long, every day. It drives me fucking insane. Is there a name for this behavior? It seems to be related to the concept of an "earworm" except earworms are repeating imagery/memories, not performances.
58 more posts in this thread. [Missing image file: tan_sub_pythagorean.gif]
FUCK TRIGONOMETRIC SUBSTITUTION I THOUGHT I WOULD NEVER SEE THAT SHIT AGAIN AFTER CALC 2. "GOD THIS SOLVES SUCH A LIMITED CLASS OF INTEGRALS AND IS SUCH A BITCH TO DO ILL PROLLY NEVER SEE IT AGAIN" AND YOU KNOW WHAT HAPPENS FUCKING DIFFERENTIAL EQUATIONS. FUCK EVERYTHING. FUCK YOU. FUCK TRIGONOMETRIC SUBSTITUTION.
8 more posts in this thread. [Missing image file: 1357587462609.png]
What is the basic building block of the universe? Is it information?
3 more posts in this thread. [Missing image file: Epcot.jpg]
Spaceship Earth is the iconic and symbolic structure of Epcot, the second of four theme parks built at the Walt Disney World Resort. One of the most recognizable structures of any theme park, it is also the name of the attraction that is housed within the 18-story geodesic sphere that takes guests on a time machine-themed experience using the Omnimover system.

QUICK MATH

5 more posts in this thread. [Missing image file: X8XEU.jpg]
Friend just asked me find this out by FOILing (6a^4 - b^4)(6a^4 +b^4) My answer was 36a^4 - 6ab^4 + 6ab^4 - b^8 Anyone know if that's correct I haven't dones de algebra is like 3 years. Thanks
4 more posts in this thread. [Missing image file: Norco 7.5-325 mg.jpg]
Is combing Norco 7s and pot a good idea?

False pregnancy

5 more posts in this thread. [Missing image file: baby-contructions.jpg]
Ok here is a odd one, say i like to have sex with pregnant women, but hate kids, could i use hormones or something to simulate pregnancy, with all the lactating and weight gain my messed up head likes?
3 more posts in this thread. [Missing image file: brain.jpg]
Why can't we remember things that happen in the future? (Sorry if the question sounds dumb, but it's been puzzling me a lot)
5 more posts in this thread. [Missing image file: 1343784432303.gif]
Can anyone recommend a good greek philosophy book?
0 more posts in this thread. [Missing image file: Dragonfly-Feature-20-01-13.jpg]
What does /sci/ think about companies like Deep Space Industries and Planetary Resources Inc. looking into mining asteroids? Does this seem realistic to you?
5 more posts in this thread. [Missing image file: roboarm.jpg]
Hello /sci/. Short question! In what programming language are most codes for industrial robots written in?
1 more posts in this thread. [Missing image file: chemo rape alien.png]
Help me out /sci/. According to one theory dyslexia can be explained by saying human beings haven't had written language long enough for us to have adapted to a better understanding for it, but that sounds like bullshit to me. I mean, if that's true, couldn't you explain any variation in determined characteristics by saying that? "Sociopaths can be explained by saying that we humans haven't adapted to a society where we don't need to kill or hunt all the time, yet." or whatever?
4 more posts in this thread. [Missing image file: physics-chemistry[1].png]
How would things be different between if I majored in Physics and if I majored in Chemistry?
2 more posts in this thread. [Missing image file: 382873_258333430891613_368835527_n.jpg]
If I am going to scale an atom where the radius of the nucleus is of the order 10^-13 and the radius of the atom itself is of the order 10^-13. How would I go about finding the radius of an atom where the nucleus was 5cm? >Pic unrelated
8 more posts in this thread. [Missing image file: centrifuge.jpg]
Silly question here, but what gets rid of precipitate impurities? Is it washing or centrifuging?
5 more posts in this thread. [Missing image file: CIY6H.jpg]
What the fuck is up with bats? Are there examples of things other than mammals and birds that can fly? Whats the missing link, flying squirells? Do bats have hollow bones, how can they fly like birds if they dont Why do fruit bats look like foxes? General bat freaks of nature discussion






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