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/sci/ Science & Math

Threads added between 2013/03/27 and 2013/04/03

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Most viewed threads in this category

24 more posts in this thread. [Missing image file: entropy.jpg]
Is it possible to calculate the entropy of an irrational number? Specifically, Pi. I'm wondering because a friend of mine stated "because Pi is infinite, every single sequence of numbers should occur within it eventually, every movie, game, etc", but I think claiming Pi has infinite entropy is somewhat dubious. In fact I really don't see it being true at all, because their are irrational numbers with very low entropy, what would make Pi the exception?

Modern Solism

21 more posts in this thread. [Missing image file: 1364839892399.png]
I'd like to introduce Modern Solism to /sci/, as it seems like something many of you could get behind. Modern Solism is a new, non-theistic philosophy/religious movement; none of us consider the Sun to be a 'true' god, but it has done all that a god is said to do, even if it is an inanimate object -- it has created life as we know it, provides food for us and all of the planet, and it's the only thing we could say watches over us constantly. For the significant role it has had in our creation and our reliance upon it for our survival for all of our existence, the Sun is something deserving of our veneration, Modern Solists conclude. We place the Sun as an object at the centre of a set of ideas which present an alternative to the choice of faith in the unverifiable or the concession of nihilism. Modern Solism is all about affirming human identity and encouraging people to work to preserve our species and nature; two of the greatest creations of the Sun. Feel free to come in and discuss, critique, or ask questions. SOL OMNIBUS LUCET
1 more posts in this thread. [Missing image file: 1364846807156.jpg]
ITT.: cool science you can apply in everyday life!

question

45 more posts in this thread. [Missing image file: 539519_353858854700986_1789632550_n.jpg]
Whats erasmus? Is it for high performing students or hipster who wants to travel and party

wow?

1 more posts in this thread. [Missing image file: lol.png]
Remind me again why people use ChaCha?
7 more posts in this thread. [Missing image file: Be the sloth.jpg]
How does one get Mathematica for cheap (or free)?
0 more posts in this thread. [Missing image file: pic30013.jpg]

noko

5 more posts in this thread. [Missing image file: 2389723.png]
Hey /sci/, I have an interview coming up for an internship, it is a Lab internship for Serum Proteins. I looked into Serum Proteins a bit and I think it is a test to check proteins in the blood stream, I guess I'm asking you guys what you know about this field. I am a 2nd year chem major in Organic Chem 1, what should I know before I go into this interview? What should I expect to be doing if I get this internship?

Help a niggah out

5 more posts in this thread. [Missing image file: images.jpg]
I need to differentiate this: ?x + 1/(?x) Help a brother! :) pic not related...
1 more posts in this thread. [Missing image file: IMG_1244.jpg]
Energy balance help: I got all the humidity/enthalpy values off the air/water psychrometric chart. (See picture, the number underlined in red) This is the calculation for the rate of heat transfer from the condenser. Why doesn't it include the mass of water in air that is entering the condenser? i.e. (400 Kg of air + 10 Kg of water) * (111.6 specific enthalpy) instead of just 400*111.6 ?
2 more posts in this thread. [Missing image file: mcgrawsuccess.png]
Hey, /sci/, have I been rused by mcgaw-hill's connect? Why does it matter whether X or Y comes first in the products or reactants side? They're completely unspecified, variable elements.

ESD

5 more posts in this thread. [Missing image file: out.gif]
I frequently get hit by ESD, when touching things that are made of metal. Mostly door knobs at work (these are the worst of them all) or even radiators and other stuff. Sometimes I can even see the spark hitting my finger. Is there any thing I can do to prevent this? Currently my trick is to "pre-touch" everything with my key, so I won't get hit directly. This works very well but sometimes I forget. Also: may plenty of body hair a cause?

Smart drugs/Nootropics

7 more posts in this thread. [Missing image file: 10127003-some-pills-for-the-brain-s(...).jpg]
What does /sci think of them? Thoughts,reviews, ones to try and ones to avoid? Poor man with no aderall hookup so the 1st im trying choline, cant rule out placebo effect yet but i do feel sharper and ideas are coming out more so than usual the 2 weeks ive been on.

Railgun

3 more posts in this thread. [Missing image file: 1352738217736.jpg]
Hello /sci/entists I am building a rail gun and I have some questions. 1) Can I run capacitors with different microfarads in parallel? 2) Can I run capacitors with different voltage in parallel? 3) I have some "unmarked" capacitors and trying to determine what they are. All my capacitors have roughly the same diameter and the ones that are marked are 330v. The length of them varies but looks like the longer ones have higher microfarads. Is it same to assume that my unmarked ones are 330v? 4) I am using 36" steel rails and am planning to use 2.6g Aluminum projectiles, I haven't determined diemensions yet. Are the rails too long? 5) Can anyone give me estimates on muzzle velocity or energy? I have read that railgun EMPs knock out chronographs so I don't know how powerful I need to make it. I am going for minimum 1,000 fps. railgun equations here http://www.powerlabs.org/railgun2.htm Thank you
1 more posts in this thread. [Missing image file: matrix-1600-900-2712.jpg]
x^2 (m*n)/4

math

14 more posts in this thread. [Missing image file: aweewae.jpg]
simple shit but i have forgot the rules.. 1/i + 1/i = -2i. How?
27 more posts in this thread. [Missing image file: tuition-hong-kong.jpg]
Last year I got an IB Maths Portfolio where I had to explore shadow functions. First few bullet points asked for a general quadratic functions and examples using shadow functions to find the complex roots. The next couple of bullet points was the same but for cubic equations. No problem here either. Last bullet points, however, asked for the same but for a quartic. Didn't do it. Got shit grade. Looking back at it, how could I have done it? I mean how does it work, quartics and shadow functions?

organic chem

21 more posts in this thread. [Missing image file: 1465-9921-7-118-4-l.jpg]
Hey /sci/ Chemistry major here, really unsure of my future. I can't seem to understand more than a half of the material in my organic chem II class here.. I'm seriously trying to understand carbonyl condensation reactions and none of it is clicking. What should I do?
7 more posts in this thread. [Missing image file: image.jpg]
IS THIS POSSIBLE /SCI/?? http://www.youtube.com/watch?v=LQFmKPA-iAg DRUNK WITHOUT DRINKING A DROP OF ALCOHOL. CAN THIS SHIT BYPASS ALCOTESTS? IS THIS THE NOBEL PRIZE FOR 2013?

Involentary Commital for Schizophrenic who is seeing/hearing things?

32 more posts in this thread. [Missing image file: 1310359512611.png]
Psych Majors or Med Students. Help? Can I be Involuntarily Committed to the ward if I have no thoughts of hurting others and am against suicide? but am a actively hallucinating schizophrenic. Though, I told him I am pro using hard drugs if depression gets bad. Saying I'd just shoot up heroin instead of killing myself if things got bad enough. IE. use drugs instead of self harm or suicide to cope. heres details. I saw a counselor for schizoaffective social skill problems and wanting to get better at speaking, writing. I post the rambling shit here sometimes Turns out, disorganized schizophrenia. He's 99% sure after seeing me write an essay about my experiences in the 'new patient home workThey let me stay past my appointment to talk more since usually it's too rushed at a psychiatrist and I never showed a doctor how my writing has gotten naturally beyond shit on a form with 1-2 lines to write I admitted to seeing a fed the other night in the dark. But it went away when I turned on the light. Told about past delusions/hallucinations. Even the INSANE ones I hid from doctors. No longer like that though. I was talking quite fast. He asked if I was on drugs several times. Stopped asking about drugs when I said I took welbutrin, i think cause it can send you into a manic state. I told him last time I used was July 4. Cocaine, 8ball in 2 days. Reality is, .5-1g a day meth since 2 weeks after july 4. Though, my mental state never changed when I did meth. It changed when I had stressful events ONLY. so I do not believe stimulants make me psychotic personally. Otherwise, why can I do up to 2 grams a night of Meth and be fine. But any type of stress such as drama or death of pets, schizo shit flares. Don't spew meth is neurotixic either, stay educated. http://healthland.time.com/2011/11/21/why-the-myth-of-the-meth-damaged-brain-may-hinder-recovery/ Continued...






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