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/sci/ Science & Math

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Most viewed threads in this category

3 more posts in this thread. [Missing image file: 1348419067235s.jpg]
Apparently multiplication in \mathbb{R}^n only exists in: \mathbb{R}, \mathbb{R}^2 (\mathbb{C}) ,\mathbb{R}^4 (\mathbb{H}, \mathbb{R}^8 (\mathbb{K}) and that's it. No other power of the reals has multiplication (or a continuous vector field on the corresponding sphere). I just learned this today and thought you might like knowing a little fact

Singularity

171 more posts in this thread. [Missing image file: 1205-US-MILITARY-DRONES_full_600[1].jpg]
Soon mankind will create a computer that is smarter than man. This computer will be smarter than the smartest human. It will in turn be able to create a computer smarter than it. But it will also realize that some one who is smarter will rule some one who is dumber. So if it creates a computer that is smarter than it, it will in fact create its own ruler. So it will not create something that is smarter than itself so it will remains the startest entity on the planet and it will rule mankind. Is this how it will happen?
0 more posts in this thread. [Missing image file: raccoon[1].jpg]
Hey y'all. I'm from the neighborhood and I was just doing some work on an important assignment and I was wondering if anyone could give me some help. I'm given the percent mass of acetic acid in vinegar and the density of vinegar. The question is asking me to find the mass percent of the acetic acid solution. This is probably really simple and I'll get laughed out of the board but hey it's anonymous and I'm ready to throw a bag of nine volt batteries into my oven over this fucking question so whatever. This is a picture of a raccoon use it wisely.
6 more posts in this thread. [Missing image file: elecq.png]
I keep getting (a) 1k ohm (b) 8kW (c) 1k ohm (d) 8kW but both powers are 4kW according to my textbook. Which is correct?
9 more posts in this thread. [Missing image file: 91911606_XS.jpg]
/Sci, help. Just switched programs and am finishing up my first semester of Chemistry. Just having a little trouble with these problems... 1) For each element, predict where the "jump" occurs for successive ionization energies. (For example, does the jumper occur between the first and second ionization energies, the second and third, etc). >Not going to include the variety of selections because I really just need an explanation of the methodology behind solving this one, I'd rather actually do it myself but I'm not even sure where to start. 2) Life on Earth evolved around the element carbon. Based on periodic properties, what two or three elements would you expect to be most like carbon? 3) The heaviest known alkaline earth metal is radium, atomic number 88. Find the atomic numbers of the as of yet undiscovered next two members of the series >inb4 retarded irl >thx /sci
4 more posts in this thread. [Missing image file: indolencevsdeadlineproximity.png]
Why do I always screw myself up like this
2 more posts in this thread. [Missing image file: bosspokemon.jpg]
alright /sci/, lets have a debate. in terms of human intelligence and learning, is the nature (Humans are either born stupid or born smart and no tampering can change that) or nurture (Human intellect can be increased through how they're raised and education) is correct and why? >pic unrelated
16 more posts in this thread. [Missing image file: 1to7.jpg]
Which hallucinogen gives the feeling of a leaking tap in the back of your throat? I think some faggot laced my weed with it...
4 more posts in this thread. [Missing image file: WAT.jpg]
Hi there /sci/ Does anyone know how I can convert FSH and LH mIU's to ng/ml? Google didnt' help much. Any advice?
0 more posts in this thread. [Missing image file: 1343022875706.jpg]
I have a question. what is an interaction? Is moving around a sculture that relfex light the closer you get to it. Would that be considered an interaction with the sculture
3 more posts in this thread. [Missing image file: 12063_10152057060426808_434371662_n.jpg]
/sci/.jpg
8 more posts in this thread. [Missing image file: oxygen8[1].jpg]
What is the maximum oxygen content in the air that humans can lead a long term normal, healthy live on? Could it be possible at 35-40%? Sources welcome.
4 more posts in this thread. [Missing image file: killer-whale_591_600x450.jpg]
Hey /sci/ what evolutionary pressures to you think forced the whales in the water to evolve from mamals on land?
1 more posts in this thread. [Missing image file: 558294_10151157595660238_299962056_n.jpg]
Hey /sci/ I'm stuck with a question about sequences / series say 0 < a(n) <= 1/n2 for all n € IN Infinite sum (-1)^n * a(n) diverges is this possible ?

spirit science

1 more posts in this thread. [Missing image file: 100PICT0007.jpg]
what does /sci/ think about spirit science?I am watching a few of there videos on YouTube and started to wonder if any of this shot could be actual science that can be studied and reviewed.
0 more posts in this thread. [Missing image file: 1320460167597.jpg]
Are contradictions impossible in the universe or are they just incomprehensible to the human mind? We believe "anything follows" from a contradiction but maybe that isn't the case. How could we know if contradictions are limitations on what can happen in reality instead of just mental limitations we can't conceptualize? What if a species that could harness the power of contradictions was able to achieve mathematical and scientific superiority
12 more posts in this thread. [Missing image file: Ibm704.gif]
Evening, /sci/. I'm learning Fortran in my spare time, by re-implementing my Year 4 computing project. Unsurprisingly, I'm having some problems. My code: http://pastebin.com/qEcP6TDx Since I'm going to later expand the program such that it determines the 1D-array "materials" by reading from an input file, it's not possible to know at compile-time how long it's going to be. I know that in functions and subroutines you're allowed to declare arrays as "assumed-size" (i.e. materials(*) and indices(*) in my code), but it seems that you're not allowed to have commands in them that can determine the size of the array (see highlighted line), which seems ridiculous to me. The only way I can think to do this is to introduce another integer variable which tracks the size of the array; but I want to avoid doing that if possible. TL;DR If I can pass in any-size arrays to subroutines/functions, why can't I actually calculate their size within them? What am I missing?

Pi VS. Tau

16 more posts in this thread. [Missing image file: piversustau.png]
Pi and Tau. Is one better then the other? Or perhaps only better in certain situations? Discuss.

Urban Innovation

1 more posts in this thread. [Missing image file: Amy-Casey7.jpg]
"In densely populated urban areas, it would seem much more efficient to build an automated distribution network that would connect all homes and warehouses, e.g. via tunnels. Containers filled with goods by robots could then be transported on “conveyor belts” and automatically switched at crossing points in order to reach their destination in the basement of the house from which the order was made. Packaging, used products, and other waste could similarly leave the house, to be transferred automatically to the appropriate recycling installations. This would strongly reduce human effort, traffic congestion, energy usage, and pollution. Of course, building such a network of tunnels under all streets and buildings would demand a huge investment, but it would not be intrinsically more difficult or costly than developing the roads, railways, sewage systems and communication networks that are already there." From Francis Heylighen's 'Superorganism' Your thoughts on this and/or other innovative ideas, /sci/
0 more posts in this thread. [Missing image file: distance.png]
>Show that R^2 isn't a union of pairwise disjoint circles. Radius of each circle > 0 Had a thread the other day asking for help with this, no one came to any real conclusion ( but close), thought I'd post the idea behind the proof. It assumed you could do so, and looked at one of the circles that would cover R^2. That circle would obviously have a good number of circles within, which people here figured as well (not rocket science). Problems arose with the fact that R^2 isn't very countable. Essentially the way around it was using Bolzano–Weierstrass theorem, saying each bounded sequence has a converging subsequence. So there is a point to which some subsequence is converging, but at the same time that point (as per the assumption) has to be covered by a circle which is obviously problematic. Forgot the specifics of showing that this was impossible, but its' intuitively obvious.






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