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/sci/ Science & Math

Threads added between 2013/07/24 and 2013/07/31

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Most viewed threads in this category

Killing ants with Popcorn

16 more posts in this thread. [Missing image file: ants.png]
http://www.youtube.com/watch?v=CL78eVVW9_M&t=65 Basically this guy says that you can kill ants by shredding popcorn Kernels. Is this true? I want to know before I shit-up my house with an even worse infestation than I already have.
2 more posts in this thread. [Missing image file: athiagroth.png]
I have an sufficient understanding of predicate logic and some ideas about computer science. Could someone elaborate: What are the barriert to solve "P=NP?" ? related, I'm watching this atm.: http://techtalks.tv/talks/1301/

www.maog.com.br

10 more posts in this thread. [Missing image file: maog.jpg]
Just as Kepler used a model of interlacing geometric figures to determine the orbits of the planets of the solar system in this article uses the same technique to determine the orbits of the electrons within a atomic model. Someone could say something about it?

Cyphers

28 more posts in this thread. [Missing image file: freedom.gif]
Hi /sci. Been lurking for a while but I really need help with a computer science related question involving de-crypting a cypher. Here is said question, which is a recovered network data packet: Recovered data: NTMgMjMgZTIgMTMgZDIgNzcgYTYgMTQgMDMgMjMgNTIgNjQgODQgOTQgODMgNTMgYjQgODQgNzMgMDMgMjMgNTIgYTYgMzYgYTYgZTIgMTcgMTcgNjYgMjYgYTYgNzcgZTYgYjYgZDIgMzcgZTYgMjYgODQgNTMgNTIgNjYgOTcgNjYgOTQgMDMgMjMgNTIgMzcgNDcgZTYgOTcgNjYgODYgZTYgMTcgNTcgNTcgNjQgODQgNTMgNTIgMTUgMzcgNDcgOTcgMTcgZTYgMjcgNjYgZDQgODQgNTMgNTIgNjQgMzMgNTIgODQgMDMgMjMgNTIgYTQgYTUgMTUgNzQgZDIgMjUgNzUgYTQgOTUgZDIgOTUgMzUgZTQ= I. De-obfuscate this data, providing detail of the stages you went through and the final output. [9 marks] I've tried for days and just can't crack it. Apparently there;s 4 pieces of useful information
2 more posts in this thread. [Missing image file: lin-02.jpg]
Hey guys. If I can't improve my prepubescent math skills I'll be kicked out of school. Practicing the most basic of maths I stumbled upon this piece of shit number and I can't figure out how a person would come up with the answer. Pls help. These are, linear functions. according to google translate from Swedish. They give you two chords in this order (5,3) (-5,8) I have to come up with the equation The equation is supposed to be: y= -x/2 + 11/2 / being dividationsignlel pls help I'm so retarded picture semi-related
3 more posts in this thread. [Missing image file: tip_of_the_iceberg.jpg]
Ok need some better heads then ours to settle a dispute. Would the Titanic have sunk if it hit the ice berg head on rather then taking the side swipe? One side says the front four crumple zones would contain the damage in a single location that would not have sunk the vessel even if flooded. The other says it would be like dropping a can of coke off a 5 story building onto the concrete. Since it would put the entire momentum and energy of the ship into a single point against an unmovable object that was just as hard as the ship if not more so. Who is right?
0 more posts in this thread. [Missing image file: 2371783536_472570e0bd_z.jpg]
stochastic and random are the same concept?
38 more posts in this thread. [Missing image file: 194075322_1361379543.jpg]
"The metre is the length of the path travelled by light in vacuum during a time interval of 1?299,792,458 of a second." What the fuck? They define the metre using a number based on the metre? Why not define the metre as the length travelled by light in 1/300,000,000th of a second, which is rounder? Is this just a fucked up definition?

pic mostly unrelated

1 more posts in this thread. [Missing image file: 1.jpg]
Tl;Dr silly post on FTL travel When l first learned of galactic filaments and saw diagrams of them, for whatever reason my mind thought 'canals' or 'rail lines' E.g. Not just interstellar but intergalactic travel was possible in reasonable timeframes, and not just from the perspective of the traveler via time dilation. The next post explaining may be brilliant or an incredible display of ignorance

Maths Problems!

6 more posts in this thread. [Missing image file: images.jpg]
Please Help Me! Its an online test and i dont know two questions. > How many vectors are orthogonal to both (1, -2, 3) and (17, 18, 19)? > Which of the following identities is NOT TRUE if u and v are vectors? 1.u.v = v.u 2.u x v + v x u = 0 3.(u-v) x (u+v) = u x u - v x v 4.(u x v) . u = 0 Also Post your math problems and people help you
27 more posts in this thread. [Missing image file: s_h03_hs201013.jpg]
Ok /sci/. Is the Human race doomed to self-destruction? Are we doomed to destroy one another? Or is it possible we can learn that co-operation is the only way to assure the continuity of our species? Allowing us to finally move past petty arguments and disagreements to something grander. Something larger? By the way things are looking...I don't think Humans have no more than a few centuries left. What are your opinions on us /sci/? On Humans? Are we great? Are we special? Are we intelligent? Are we anything?
0 more posts in this thread. [Missing image file: 220px-PharmacistsMortar.svg[1].png]
Greetings /sci/, I'll begin studying pharmacy this semester, and was wondering if you know any online resources for getting introduced to the subject? Also any tips/advice about the subject in general would be greatly appreciated.
0 more posts in this thread. [Missing image file: evacuate earth.jpg]
Yesterday, i watched this documentary: http://www.youtube.com/watch?v=nipCtIyWsL4 (Evacuate Earth) It was very intriguing although it was purely based on science fiction. But do you guys think the scenario depicting on the documentary would really happen?
4 more posts in this thread. [Missing image file: 1374639785239.jpg]
why is the andromada galaxy on course to crash into our galaxy? I thought space was expanding, and all galaxies were moving away? Not a troll, just confused
14 more posts in this thread. [Missing image file: chickchickyboom.jpg]
Can someone link me a good, reputable graph of the average temperature in the north pole over the last few hundred years/since people started to record it? I can't find anything good on Google.
35 more posts in this thread. [Missing image file: 602016_280464475419438_947117014_n.jpg]
Grad Physics fag here. I'm reading Jackson's Classical Electrodynamics, 3rd edition, and starting at eqn 1.30 he expands the charge distribution as: &rho(\mathbf{x'}) = &rho(\mathbf{x}) + \frac{r^2}{6} ((\nabla)^2)(&rho) where \mathbf{x'} is the input, \mathbf{x} is the point we are expanding around, and |\mathbf{x'} - \mathbf{x}| = r. The function @rho is smooth and all that jazz. Can you help me see how he expands the function like that? Thanks.
12 more posts in this thread. [Missing image file: image.jpg]
Hey /sci/entists. Would it be able to build a generator that could generate power through the use of magnets? Positive charges naturally repel other positive charges. Perhaps we could use this principal to spin a generator and generate electricity. Perpetual energy. Thoughts?
33 more posts in this thread. [Missing image file: apersonalvoyage.jpg]
Opinions of the Seth Macfarlane/Neil Degrasse Tyson sequel to Carl Sagan's Cosmos: A Personal Voyage. My opinion is Macfarlane will be good to sell the show to the public; this is a good thing because the purpose of the original Cosmos was to popularize science among the public. Tyson is fantastic at explaining things in a poetic/thought provoking way much the same as Sagan was. Im fucking counting the days /sci/

Time

23 more posts in this thread. [Missing image file: image.jpg]
Define and explain time

Drunvalo Melchizedeks 'The Ancient Secret of the Flower of Life'

7 more posts in this thread. [Missing image file: 978-1891824-17-3.jpg]
Alright we're here to discuss everyones interpretations, revelations, discrepancies, and general experience reading this book, if your just discovering it, or have known if for a while. I read this book a couple years back and it changed my life, it encouraged a deep introspective dive into thinking about what our experience on this planet as humanity really is. It incredibly ties together innumerable events and situations(religious, scientific, and spiritual, political) on this planet and cosmos as we experience it. It has such outrageous claims that test "common knowledge" thought process that in order to convey the information it doesn't even claim legitimacy, rather says that you can read it like a reference book or like a novel, Ive read at least the first volume three times and I think it is really acknowledging some concepts that are desperately in need of consideration by the "common thinkers" of the world. Reading this book was like taking some seriously hard drugs. I'd read a page or two and set it down for a day thinking about was I'd just read, never read a book like it before. It honestly will make you re-look at the world with childlike wonder. It is torrent-able, and if you enjoy it i would recommend purchasing it but the info is so important if i didn't restrain myself I'd be reaching through the internet shoving it down your unsuspecting throats but in all seriousness, let me know what you guys think. It would greatly help if you at least take a quick look through the book before posting. If you have some delicious info relating to the subject please share. Thanks ppl of 4chan






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