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/sci/ Science & Math

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Most viewed threads in this category

What do these abbreviations mean?

4 more posts in this thread. [Missing image file: image.jpg]
/pol/ here. Found a screencap from /x/ that describes chemical explosions. What do the 1.2E, 1.3E, etc. mean?

paranormal /sci/

2 more posts in this thread. [Missing image file: article-1307188-0AF5F988000005DC-68(...).jpg]
What is the most paranormal belief you think currently has scientific credibility or will get scientific credibility in the future and how it is or will become accepted within the scientific community.
3 more posts in this thread. [Missing image file: murata.jpg]
>Nothing speeds brain atrophy more than being immobilized in the same environment; the monotony undermines our dopamine and attentional systems crucial to maintaining brain plasticity >Norman Doidge’s book The Brain That Changes Itself Does that mean I'm much better at brainy activity because I'm a hikki?
17 more posts in this thread. [Missing image file: Dripping_faucet_2.jpg]
I've watched a dripping faucet and now I'm wondering about a few things. First I've noticed that the water was dripping steadly like a metronome at about 40 bpm and how I could increase the beats per minute by opening the tab slightly. When I opened it further I've noticed how the beat would become irregular for some reason. With a tiny amount of additional water it turned into a smoth stream, only dripping at the bottom. Seeing this stuck my finger into the water and moved it up the stream. The higher I've got the more I've noticed the creation of a wave effect in the stream and almost at the top of the faucet I removed my finger and the faucet started dripping. Somehow I've broke the flow and interesting enough the dripping had stabilized even though the amount of water coming through didn't change. Can someone explain what happend there? Any theories?
19 more posts in this thread. [Missing image file: Electromagnetics yo.png]
When will science finally realize gravity and electromagnetics are one and the same?

Animal Rights

1 more posts in this thread. [Missing image file: 2990172-518938-owl-in-a-cage-at-the-zoo.jpg]
Hey guys. Let's help Nature and show those indian ignorant idiots that they are wrong by signing this petition... also, spread the word: http://www.thepetitionsite.com/322/656/307/stop-owl-sacrifices-in-india/?z00m=20616677 Pwn them.
1 more posts in this thread. [Missing image file: it appears you are trying to science.jpg]
I need help /sci/ I'm a dropout self employed engineer who's been self teaching himself for a while, and I recently had a cool idea for a project and I need guidance. I need the formula for calculating the volume of oxygen that will be produced through electrolysis. Say I have 1 liter of pure H20, how do I calculate how many grams or liters of oxygen will be produced from that one liter of H20? I understand there are a lot of unaccounted variables, such as electrolysis efficiency, temperature, pressure, ect but a general idea would really help. Or a simple finger in the right direction/link would help.

Putnam/Olympiad problem of the day

0 more posts in this thread. [Missing image file: day[1].gif]
Daily problems at: http://math.harvard.edu/putnam/ To find threads: >>>/sci/putnam An n-gon has all angles equal and the lengths of consecutive sides satisfy a_1\ge a_2\ge\ldots\ge a_n. Prove that all the sides are equal.
1 more posts in this thread. [Missing image file: image.jpg]
Okay guys, so as a child I happened to be extremely bright. I don't mean bright in the aspect of what I retained, but rather the way I processed it to understand it. Understanding new things for the first time made me truly happy. I was depressed for the last couple of years; literally right when I began to fail in school due to other reasons. I recently started trying again and I'm happier than ever with the result of my trying. Does anyone else only really feel happy when they're grasping abstract concepts, whatever they may be, and applying them to their every-day life? What is this happiness that I feel and why is that the only thing that makes me happy enough to continue living at my full potential?

Question for /sci/

25 more posts in this thread. [Missing image file: 220px-HAL9000.svg.png]
Why haven't we created a sentient/conscious AI so far? What's preventing us? Anyone willing to share some insight?
6 more posts in this thread. [Missing image file: scen.png]
I'm stuck at something retarded, it's a question about diffraction basically asking how many more decibel you get by using a cone type thing to direct audio at the audience rather than just having a speaker with sound going in all directions. In any case I boiled it down to the final equation where I could solve it for delta B, however.. I need the area for the intensity when using the cone thing. I thought of doing some approximation but apparently it's just [tex](\alpha R)^2 * \pi[/tex] I've got a major brain fart, what the fuck is that?
10 more posts in this thread. [Missing image file: 20120517.gif]
Does a degree obtained by distance education have less prestige? Like a Math one.
64 more posts in this thread. [Missing image file: skyrim.png]
Is there a scientific consensus on what exactly the effects of global warming throughout 21st century will be if we do not take any drastic measures? I know a guy who keeps saying that damages incurred by warming will be much less than costs of actually cutting emissions, is this true?
5 more posts in this thread. [Missing image file: 1374839679856.jpg]
How easily can one get a job in the field with Bachelor's in Chemistry and Physics? Is a Masters or PhD needed, or just recommended? I fucking love science, but I don't know much about the potential career options.
3 more posts in this thread. [Missing image file: shadowofthecolossus.jpg]
/v/ here Why do video game devs (or any story that uses giants) always make giant enemies slow? Is there a scientific reason to it or are they just being retarded? Shouldn't giants be faster since they can cross a longer distance in the same time?

Kinetics

0 more posts in this thread. [Missing image file: dep_13406387-Hydrogen-peroxide-H2O2(...).jpg]
Why is OH + OH + M --> H2O2 + M (M is present in excess) a bimolecular recombination reaction but H + H + M --> H2 + M (M in excess again) is a trimolecular recombination? I'm studying for my exam and I fail to see the difference? Why is the top reaction not trimolecular?
4 more posts in this thread. [Missing image file: CircuitTheory.jpg]
So, I just finished my first year at college, EE major, and I just took Digital and Analog. Next semester I have Physics, and Circuit Theory. I admit I need some work both of these courses so I'm here to learn. Does anyone have any good links that may help me in these areas just to give me any upper hand? Anything would be greatly appreciated. Thanks /sci/.
9 more posts in this thread. [Missing image file: birdss.gif]
What are birds?
13 more posts in this thread. [Missing image file: cosx.png]
In high school I was often bored and thus I played around with my calculator a lot. I noticed some interesting occurrences, but I'm just now trying to figure out the nature behind them. For example, if you take the natural log of any number except 0 numerous times, the answer will eventually even out to the solution of " x = e^x ", or the "fixed point" of f(x)=e^x. This number is approx. 0.3181315 + 1.3372357i By this I mean, if you do ln(ln(ln(ln(ln(ln(ln(...ln(x) you will eventually get that number. My first question: Is there's a standard notation to write "take the natural log of a number x or infinite amount of times". Also, I am curious on how to solve for such equations that can't be solved algebraically or with any calculus I have learned so far. For example, the solution to x = cos(x) can't be solved algebraically as far as I can tell, so how would something like that be solved (The answer, which would be the "fixed point" of f(x)=cos(x) is about 0.739085)? Lastly, can the solutions I have mentioned be written in any non-decimal form? By this I mean, say you have this seemingly-random number "4.810477381...". At first it seems like it isn't related to anything, but it's actually sqrt(e^pi). Could it turn out that the solution to x = cos(x) is actually *exactly* the cos(of number probably involving pi or e)? Thanks for reading, pic shows approximations for the fixed point of cos(x), one of the examples I was talking about.
0 more posts in this thread. [Missing image file: Gravity Waves from a Rotating System.jpg]
I just read an interesting scientific paper on what seems to be a practical design for a gravity-wave generator of useful efficiency. Admittedly, it was on the arXiv, so it's not the most credible source, so I'd like to ask you- can you look over this and tell me if it's legit? It's way outside my field of study. http://arxiv.org/ftp/physics/papers/0410/0410022.pdf Also, is it true that in some analyses, gravity waves colliding will create a static gravitational field? I realize that, pending an actual detection of gravitational waves, that this is largely a question of theory and speculation.






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