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/sci/ Science & Math

Threads added between 2012/09/05 and 2012/09/12

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Most viewed threads in this category

17 more posts in this thread. [Missing image file: srb-blades.jpg]
Does exsanguination (bleeding out) hurts? Where is it best to cut, is "down the road" on both arms and the jugular enough? How long does it take to die? Would vasodilators accelerate the process? Would it be any different if you were to drink alcohol or use drugs before doing it? Just asking, need to know.
20 more posts in this thread. [Missing image file: 61wx5q-DaHL._BO2,204,203,200_PIsitb(...).jpg]
Does anyone have a torrent of this book, or maybe an e-version they could upload? I have the international version, but this book is apparently the only international version in the fucking world where they actually swap the questions around. I need the US version so I can compare questions. Book is "Probability and Statistics for Engineers and Scientists (4th Ed.) Anthony Hayter"
21 more posts in this thread. [Missing image file: download_car.png]
where do you guys download math/sci textbooks from? library.nu and genesis are both down/gone :( is there a good torrent tracker just for books?
61 more posts in this thread. [Missing image file: Another_Mr__Uppity_design_by_Percyfan94.jpg]
Which major creates the most arrogant students? >I honestly think it's math. You guys learn one proof and you suddenly act like you know every secret of the universe.
11 more posts in this thread. [Missing image file: 1334120448692.jpg]
A hollow, conducting sphere with an outer radius of 0.250m and an inner radius of 0.200m has a uniform surface charge density of +6.37×10^-6 . A charge of -0.500x10^-6 C is now introduced into the cavity inside the sphere. a)What is the new charge density on the outside of the sphere? b) Calculate the strength of the electric field just outside the sphere. c) What is the electric flux through a spherical surface just inside the inner surface of the sphere? anyone???
1 more posts in this thread. [Missing image file: mfcd00011631.png]
Has anyone here used Red-Al before? Is the 65 wt% solution in toluene supposed to be viscous and syrupy?

Anime Schrodinger's cat explained :3

10 more posts in this thread. [Missing image file: kawaii uguu.png]
For an anime video this is an amazing explanation http://www.youtube.com/watch?v=fZmVECQ9EfU Anime girls who know physics :3
15 more posts in this thread. [Missing image file: Eva-Asuka.jpg]
What's the scientific name for red hair?

Arithmetic Sequence

10 more posts in this thread. [Missing image file: IMG_0276.jpg]
I'm fucking stupid at math and also wasn't shown how to get through this. I'll assume both questions are pretty much the same, but if someone would be so kind as to explain the process to me, I'd appreciate it.

"Death ray"

11 more posts in this thread. [Missing image file: 1W-Blue-Laser-560-x-420.jpg]
i wanna build extreme ultraviolet or near x-ray laser powerful enough to ionize narrow beam of air. Other than world domination, I will user laser beam as antenna for capturing Schumman's frequencies, and possibly as a conductor towards ionosphere. Anyone has experience with this? Ides? Suggestions?

Solved Maps

5 more posts in this thread. [Missing image file: avatar72571_5.gif]
Using The Least Amount of colors what are possible solutions for these maps without one touching anothers of the same color? http://www.ccs3.lanl.gov/mega-math/workbk/map/boxville.gif http://www.ccs3.lanl.gov/mega-math/workbk/map/popdale.gif
37 more posts in this thread. [Missing image file: #wave.jpg]
Wave power. Discuss.

Confidence Intervals in Econometrics

4 more posts in this thread. [Missing image file: confdiag.gif]
I'm asked to find a 95% and a 99% confidence interval of the population mean based on the following: *On a study of social media usage, randomly selected 33 students between ages of 18 and 24 were interviewed. The study found the average minutes that the students spent on Facebook was 121.9 minutes per week with a standard deviation of 30.5 minutes. So, Sample Size (s) = 33 Sample Mean (Xbar) = 121.9 Sample Standard Deviation (s) = 30.5 I was going to use the following formula and the t-score chart: Xbar +- t*(s/(square root of n)) to get the confidence interval. But I'm getting the Degrees of Freedom to be 32 because 33 - 1 estimated variable. And the t-chart doesn't go to 32. So how should I go about this? Thank you,

My Dream Girl

0 more posts in this thread. [Missing image file: 0820081318244art[1].jpg]
Some great stuff: http://www.youtube.com/watch?v=XuNVGW7nDrY
5 more posts in this thread. [Missing image file: Sir-Isaac-Newton-001.jpg]
Greetings all, I need some advice from people who are currently working as physicists in Australia. I want to undertake a study of physics and work in the field, im not entirely sure what specific area at the moment but it would probably be in particle physics or astrophysics or even theoretical physics as these are my main areas of interest. I won’t bore you with too much background and my reasoning for wanting to pursue this career but I can assure you that I have always had a passion for science and I know that no matter what im doing in life that I always will. I have recently began considering actually following my passion in life and since letting this thought into my head I have felt profoundly different.. its probably a mixture of extreme excitement and uncertainty. My day to day thoughts are driven by two things. The first is my love of science and the second is my desire to be well off financially speaking the latter of which leads me to my questions to you. Question 1: Can you give me a good idea of what a Theoretical, particle, astro physicist makes after completing their education? Question 2: what amount of growth could I achieve in these fields (financially and authoritatively) and where can these jobs take me? Question 3: what EXACTLY do people in these jobs do on any given day? Sorry if these are broad questions but I really am trying to get the best idea I can before I make the plunge. Responses will be GREATLY appreciated!
0 more posts in this thread. [Missing image file: WonderShowzen4.gif]
6 more posts in this thread. [Missing image file: SNSD-kpop-23773639-1600-1066.jpg]
ITT: Post the name of the courses you are studying this term (or semester for ameribros) Quantum Field Theory Symmetries, Fields and Particles General Relativity Cosmology

Engineering notation

14 more posts in this thread. [Missing image file: zombiefood.jpg]
12.35mm is already in Engineering notation right?
3 more posts in this thread. [Missing image file: 1342934800514s.jpg]
How useless is an Engineering Geology degree?
10 more posts in this thread. [Missing image file: PIA15699.jpg]
marssssssssssss






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