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/sci/ Science & Math

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Most viewed threads in this category

12 more posts in this thread. [Missing image file: 1375535657225.png]
Why did Russian women evolve to have huge as fuck tits? Likewise, why east asian woman cannot into jugs?
16 more posts in this thread. [Missing image file: 747394.jpg]
Why isn't biological half-life just, life? I'm not implying i'm on to something and all scientists are retarded I know i'm missing something this is an actual question what does it matter when half of somethings effects to wear off and not the entire thing?

Humans and humanoids

3 more posts in this thread. [Missing image file: Selam.jpg]
Where can I find pictures and reconstruction attempts of primitive humans? Stuff like the following would also be greatly appreciated. http://www.youtube.com/watch?v=vmb41PcarVY

Momentum and Energy

18 more posts in this thread. [Missing image file: Névtelen.png]
I have a question. There are 2 masses one with v speed, the other with 0 speed. The first start pushing the other untill they are at the same speed. The momentum must be the same before and after. Before m*v After 2*m*v/2 But the Energy of the system has to be the same too Before: 1/2*m*v^2 After: 1/2*2*m*(v/2)^2=1/4*m*v^2 if the new speed is v/2 and that is not equal. What is wrong here?


5 more posts in this thread. [Missing image file: imgr43es.jpg]
Let's talk about Fluorine. Fluorine is the most reactive and most electronegative of all the elements. SO BOW DOWN This shit doesn't exist in nature in it's elemental form because it's so reactive but it will FUCK YOUR SHIT HARD if you attempt to RELEASE THE BEAST. Don't ask me, though, just ask all those stupid scientists that died trying. Hydrofluoric Acid; put it in glass Pyrex it's like FUCK THAT SHIT and eats right through it. Iron? No problem. Lead? Fuck you. Fluoroantimonic Acid; strongest acid know to man. You even think about touching this shit your whole family dies and your stupid cats. ALIEN BLOOD EAT YOUR HEART OUT. You can only store it in a Teflon container, which reminds me.. Polytetrafluoroethylene, aka Teflon; one of the most corrosive resistant and stable compounds known to man. Suzy homemakers reading this better check their panties. You can't fuck with this shit OH, I FORGOT, unless you have... PERFLUORODECALINE; this shit DISSOLVES teflon. LOLZ, YOU NEED FLUORINE TO BEAT FLUORINE. Bitches. Oh, and you can dissolve a shitload of oxygen in this and BREATHE LIQUID. Well, at least until you don't die from carbon dioxide build-up. But FUCK YOU only pussies die. Uranium Hexafluoride; you need this to isolate U-235 from naturally occurring Uranium to make an atomic bomb. Yep, that's right bitches, without fluorine all those stupid gooks would still be alive. HA HA! LOL, FLUORINE FUCKS YOUR SHIT NIGGERS AND YOU KNOW IT
20 more posts in this thread. [Missing image file: discovery1.jpg]
Found this in ontario... Can anybody name anything off this coin to the right? Names of people?

Basic math

26 more posts in this thread. [Missing image file: Dat+ass+_8d4f5bb91ddc48b1789a4be532(...).jpg]
Hey /sci/ I forgot how to math... Simple question, I'm going to feel like an idiot once it's answered I know. How would one equate; (10^9-x -2)^2 Thanks for your help
1 more posts in this thread. [Missing image file: north-korean-tractor-simulator.jpg]
How many minutes does it usually take to reach LEO? I'm trying to figure out if DPRK has the ability to launch a satellite into orbit. I know there latest missile has a combined (3 stages) burn time of 4,5 minutes and is capable of atleast reaching 10.000 kilomters. Now I want to deterine if it goes fast enough in those 4,5 minutes to reach the magical speed of 27,500 kilometers per hour.
36 more posts in this thread. [Missing image file: 1003906_517265445010156_1500766027_n.jpg]
what do you think? show your work, or reasoning.
0 more posts in this thread. [Missing image file: calculus.jpg]
So I have one more exam to finish and I really like finding online notes from various US unis, but I can't seem to find classes that cover the following material closely (electrical engineering). In what subject is the following covered (engineering level not physics/math level) Integral transformations (Fourier transform, Laplace transform). Special functions (Gamma function, Beta function, Bessel function). Partial differential equations (wave equation, the equation of heat conduction, Laplace equation). Variational calculus (Euler equation).
14 more posts in this thread. [Missing image file: 8-6-2013 4-15-31 PM.png]
Looking for some help with these problems, I have no clue where to start. Help please! a) 3 + 6 + 9 + 12 + 15 + 18 + …. + 303 b) 6 + 7 + 8 + 9 + 10 + 11 + …. + 102
2 more posts in this thread. [Missing image file: Screen Shot 2013-08-07 at 12.12.22 PM.png]
Okay so my online math class is beyond retarded when it come to entering in answers Firs it was the graphs that would lets me enter in decimals only whole numbers. So I could never input the right answer... Now these fucker are rounding every answer I've gone through 8 of these and I have no idea how they are doing the rounding? They seem to be different everytime Pic related tell me what you get? Because I cannot for the life of me get any of these right
7 more posts in this thread. [Missing image file: diamond.gif]
The five members of the sanford family picked a total of 8 1/3 cartons of blueberries. Which expression would allow the berries to be distributed evenly among each family member. (1) 25/3 x 1/5 (2) 3/25 divided by 1/5 (3) 5 divided by 25/3 (4) 5 1/3 x 5/1 (5) 8 1/3 x 5/1 I dont need the answer , I just dont understand what I have to do to figure out the answer. Help please, I think the answer would be choice 3 because you would have to distribute the blue berries amongst 5 people so I would assume you would have to divide, am I correct? If not how do I go upon figuring out the correct answer? Thanks in advance for your time.

People like us.

69 more posts in this thread. [Missing image file: curta.jpg]
My IQ, according to the standard Stanford-Binet Intelligence test, is 150; top 0.5% of the population. I'm not bragging. I didn't work for it,didn't earn it, don't deserve it. People who gloat about it are maladjusted. I am posting this simply as background information. I am looking for people who have experiences similar to mine. When I was a child my father, an engineer, defined the idea of a perpetual motion machine for me. Replaying the memory in my head I realize he was trolling, playing with a kid the same way parents do when they talk about Santa. He challenged me to build one. I went out in the garage and standing at his workbench started to plan. I stood motionless staring into space while I simulated devices, made "thought experiments" in my head. After what seemed like a half hour but turned out to be all afternoon I went back in the house and told dad that it was not possible. He questioned me for a while and dropped it. The point is that physics, on a "real world" level is obvious to me. When I was taught that F=ma I thought "Duh". When I learned how to calculate trajectory I thought "My dog can catch a ball". The point is that physics came to me naturally, almost instinctively. On the other hand, many other subjects come hard. Math; geometry is also obvious to me. If I had never learned it I seriously believe I would have invented it but calculus I have still not mastered, it comes hard and even when I can "do" it I feel like I am faking it; plugging numbers into an equation without understanding it. Who else here has had a similar experience? Has found one subject transparent "Why does this even need to be said?" but is normal or even sub-normal on another subject?

sun shift

13 more posts in this thread. [Missing image file: 1375701972069.jpg]
nasa says sun's magnetic pole shift in next 3-4 months will be felt as far as pluto. >says nothing about what might happen to us on earth thanks guys captcha: intelligence gaific
8 more posts in this thread. [Missing image file: vlcsnap-2013-08-07-16h48m17s193.png]
Is this jew correct? He says that stars will inevitably be so small that life will cease to exist because of the lack of light.

Perfect Cuboid Problem

8 more posts in this thread. [Missing image file: Brick_1000.gif]
Hey there, everyone. I know that the general consensus is that there is no integer solutions to the perfect cuboid problem. But I believe I've stumbled onto one over some work I've been doing on it for the last year or so. I will be consulting a math professor who is a friend of mine soon, but I'm curious. What does /sci think about this problem? Do you believe that there is a solution or not, and why?
5 more posts in this thread. [Missing image file: 1375410200037.gif]
What does /sci think about sacred geometry? Did you know you can derive pi and the Fibonacci sequence from it? As well as the Golden ratio?
15 more posts in this thread. [Missing image file: 1.png]
A frog leaps 1 meter on a rubber band with a length of 2 meter. After each jump the rubber band is pulled out to double it's length. So, the frog jumps to 1 meter on the rubber band. The rubber band is pulled out to 4 meters. The frogs location is still in the middle (2 meters). The frog jumps to 3(out of 4) meters, and the rubber band is pulled out to 8 meters. The frog jumps to 7(out of 8) meters. And so on. At which point does the frog reach the end of the rubber band?
2 more posts in this thread. [Missing image file: Airplane-Need-to-Land.jpg]
Why aren't airplane wings sharp like a knife, wouldn't it cut through the air better? Is it it because it wouldn't create any lift, or maybe it just wouldn't glide properly?

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