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/sci/ Science & Math

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Most viewed threads in this category

2 more posts in this thread. [Missing image file: 1348012294234.gif]
astronomy question: if you were standing at the earth's south pole, which stars would you see rising and setting? im guessing the answer is no but i cannot argue why. can you fill me in?
26 more posts in this thread. [Missing image file: NewtonsCradle.gif]
If a Newtons Cradles was placed in a vacuum so that there was no air resistance. Would it keep swinging forever? If so, how difficult would it be to make? If not, what would slow it down?
13 more posts in this thread. [Missing image file: 1347829077087.jpg]
Alright so why the fuck do I suck at chemistry so bad that I freeze up on the tests and bomb them? College chemistry by the way. Just took my first test and got my ass handed to me despite spending ridiculous amounts of time with the material
10 more posts in this thread. [Missing image file: consider the following.jpg]
What's the algorithm for winning the "toothpick game"? The rules are two players alternately take 1-3 toothpicks from a pile that initially has 11. The goal is to leave the other player with the last toothpick.
2 more posts in this thread. [Missing image file: infinite-series-square.jpg]
Homework question that I'm stumped on. Geometric Series. Okay here goes. A culture initially has 5000 bacteria, and the number increases by 8% every hour. a) How many bacteria are present at the end of 5 hours? b)Determine a formula for the number of bacteria present after n hours Variables should be T1= 5000 r= 1.08 n= 5. I plug them into Sn= T1(r^n - 1) ---------------------- r-1 But I keep getting 29,333. The correct answer is 7356. Any help would be great. HS fag btw
6 more posts in this thread. [Missing image file: s.png]
Hey /sci/. The Hafele–Keating experiment showed that after having flown two atomic clocks aorund the Earth, they would end up not showing the same time. The one following the Earth's rotation went slower, and vice versa. But doesn't velocity depend on the frame of reference? How could you say that flying against the Earth's rotation is inheretly slower than flying with it? Is there some sort of absolute zero velocity?
47 more posts in this thread. [Missing image file: wet_brain.gif]
The human brain is completely fucking shit. Almost useless. Prove me wrong. I just had a panic attack over the most trivial of things. And guess what. I'm not alone. People have complete panic attacks over the most trivial of bullshit. A tiny creature with 8 legs is enough to suspend all rational thought in some people. Their brain decides the best course of action is to completely flood their body with adrenaline. Their heartrate increases. Their veins constrict. They start feeling lightheaded, tingly or like they're going to throw up. All rational thought is gone they just need to get out of there. This has happened to you too, and it was something completely inane and not life threatening at all. If you've never experienced this then you've lived a sheltered life. This response drives you to stick with what you know, which is probably your computer, wasting away the hours on an anonymous imageboard instead of going and doing something. No mine wasn't arachnophobia, but rest assured, it was just as pathetic. But go ahead, name one good thing about the human brain. "Oh we have a great capacity for learning". No we don't. Trying to learn is like trying to fill a colander with water. You can only replace faster than stuff falls out. Those differential equations you were doing all last year? Well you haven't used them over the summer, so you've forgotten them. You need to remind yourself. That French grammar you spent 5 hours a week, 40 weeks a year, 4 years of your life studying? Well you haven't used any of it in 12 months so you've forgotten it all. All gone.
2 more posts in this thread. [Missing image file: RTS in Carbon.png]
>Can graphite treated merely with water become a superconductor at room temperature? This is the extraordinary claim made by scientists in Germany. Unsurprisingly, this has been met with scepticism – from measured to outright – by other experts in superconductivity. http://www.rsc.org/chemistryworld/2012/09/graphite-room-temperature-superconductivity So it's been almost a week since the news broke about granular graphite soaked in water being a potential superconductor at room temperature. What say you, /sci/? On the one hand, the only signature of superconductivity the researchers could find was a magnetic change indicative of a phase transition; they couldn't actually measure conductivity because the amount of material that displayed the phase transition was very small. On the other hand, the researchers are confident that it's not an experimental error, because they reproduced the effect a number of different times. The actual paper is here: http://arxiv.org/abs/1209.1938

soon.......

0 more posts in this thread. [Missing image file: image.jpg]

Alchemy Today

10 more posts in this thread. [Missing image file: alchemist_symbols.jpg]
Hey /sci/, I've been pretty good at chemistry in high school, and I've always had an interest in ancient concepts. So I've decided to take up Alchemy. Now I'm not going to attempt to turn lead to gold (impossible, even a nigger knows that), rather, turn it into a hobby of mixing elements and potions and seeing what i can create through actual ancient alchemical means. No lab, no making Philosopher's Stones or Elixers of Life. discuss?

NMES

1 more posts in this thread. [Missing image file: 1345862031723.gif]
/sci/, I would like your opinions on my project of an open source [/buzzword] NMES system. Because I'm posting this from a phone, I'll just crosslink to my post on /diy/ >>>/diy/298213
6 more posts in this thread. [Missing image file: 1347468117046.gif]
hey /sci/ assuming i know a and ?, how do i get the Cartesian form of: a·r = |r|cos ?. thanks
3 more posts in this thread. [Missing image file: Funciones-lineales-ejercicios.jpg]
Help a retarded fag out, just an easy function, I just fail math badly and only in it for the grade, not the exam, so if anyone has time.. It's y=1/3tan²x-1

Sodium

18 more posts in this thread. [Missing image file: salt.jpg]
What is so special about sodium? For years, I have been using salt (NaCl) as a tool to repel ghosts, demons and the like. Recently I decided to experiment with other compounds (I am trying to discover the essence of demonic repulsion). First, I tried my experiments with KCl. It was almost entirely ineffective. The demons behaved as though there was nothing there, and I was lucky to get out of my lab alive. Had to get 3 exorcists to drive them out, cost me a fortune. Anyway, this suggests that sodium, not chlorine, is the ingredient that repels demons. Does anyone know why? What does sodium have that potassium does not?
21 more posts in this thread. [Missing image file: 418Ui+B30HL._SL500_AA300_.jpg]
I have a feeling the job market for engineering fields is going to be incredibly oversaturated in the next few years. Anybody else agree? My hypothesis is based firmly on anecdotal trends. Every board I post on (4chan, bodybuilding.com, Reddit) has a significant portion of users who are going for an engineering degree. The number of people in my school going for an engineering degree seems to have increased over the last year. I was on Tinychat going into random rooms the other day and at least two of them had debates over engineering salaries. And, lastly, my cousin, a high school dropout and father at 18, called me yesterday and told me that he's majoring in engineering. What do you guys think? This is purely anecdotal, as I said, but it seems to me that getting an engineering degree has become something of a trend due to the poor job economy. The argument that people who enter an engineering degree won't necessarily finish it is getting weaker and weaker since more and more people are pursuing the degree. What does that mean for us? What does the future hold?

Ducks

0 more posts in this thread. [Missing image file: duck truth.jpg]
packinwonderland.blogpot.co.uk and https://twitter.com/georgeApack
61 more posts in this thread. [Missing image file: images.jpg]
what are two examples of questions that cannot be answered using the scientific method?

The theory of evaltivity - evolution solved.

5 more posts in this thread. [Missing image file: mutation.jpg]
I have recently been running tests over the past few years now and now finally have the answers to your evolution-based questions... So; first of all as it states in the Theory of relativity measurements of various quantities are relative to the velocities of observers. In particular, space and time can dilate. Thus translated with many responding and manipulated variables; every thing that is brought into this rate of time is a genetic mutation, many people ask the most dumbest question of all, when it can be answered by common sense; "What came first, the chicken or the egg?" An egg cannot be created by a genetic mutation as it has nothing to mutate from, thus leading toward the chicken is a genetic mutation itself, the first chicken was geneticly mutated from something other than an egg, thus leading to the point that it was never actually "born"... In simpler words - the chicken came first, not the egg. There was not an egg until the chicken came. Anyways, (NO) the whole human race and other animails were not made just by a chicken, they were all made by them themselves, no eggs or a mother, just a genetic mutation. Your evolution questions are solved. Science Major - Bub Brown

BCI

14 more posts in this thread. [Missing image file: deepmedneuronnetwork2.jpg]
I am very curious about the possibility of using a nanowire array (with nanotubes) to build a brain-computer interface. Anyone here knows where can I read this article for free? http://spie.org/x648.html?product_id=608131
3 more posts in this thread. [Missing image file: .png]
Helping out my little brother with his logarithm homework, and I'm completely brain dead on this one






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