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/sci/ Science & Math

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Most viewed threads in this category

1 more posts in this thread. [Missing image file: TLAxevv.jpg]
Was 4chan named after the Fortran programming language used in the first assembly IBM computers?
2 more posts in this thread. [Missing image file: chineseWeeabooB.png]
Is there anyway to download this equation editor to use offline? http://www.codecogs.com/latex/eqneditor.php
1 more posts in this thread. [Missing image file: ange 96.jpg]
>>>/x/13431267 Chemistry majors you're gonna love/hate this thread.
1 more posts in this thread. [Missing image file: 1354479530315.jpg]
How do double bonds affect the polarity of a molecule? I know if the outer shell of an atom is filled by the double pond, polarity decreases because an otherwise lone pair of electrons is shared. However in [SiO3] -2, would the oxygen with the double bond have more pull going towards it, thus making it polar?
5 more posts in this thread. [Missing image file: e_cat_ht.png]
According to some (at least somewhat) reputable sources, Cornell University has done an independent test confirming that Rossi's cold fusion device actually works. I smell bullshit. Why is there no mention of it on cornell.edu? You'd think this is something they might want to share with the world, right? Google search turns up only a few blog posts and a Forbe's article.
0 more posts in this thread. [Missing image file: hi.jpg]
Hi guys. I'm struggling a bit while trying to construct some operations for a binary finite field. I've constructed a linear map for u --> u^2 (u belongs to the finite field of course) for the binary finite field with modulo x^4 + x + 1. Is there an easy way to get u --> sqrt(u). Would an inverse matrix do it? I started the calculation but the result was looking pretty horrific so I decided to ask if there was a nicer solution.
3 more posts in this thread. [Missing image file: an-odd-balance-puzzler.jpg]
You have a balance beam, the kind of scale that tips from one side to the other, depending on the weight on each side. On each side is a beaker, half-filled with water. The sides are in balance. Now, on the left side, you submerge a ping-pong ball suspended by a string. On the right side, you submerge a steel ball of the same volume as the ping-pong ball suspended from a crane. Does the balance beam tip to the right, to the left, or does it remain unchanged?

Antidepressants and conscience

4 more posts in this thread. [Missing image file: antidepressant_medications_sign.jpg]
Can antidepressants affect your conscience? Like, would they affect it in such a way that you would do things you would have never done before taking them? Examples would be stealing, cheating, lying, etc? I have googled it but could not really find any scientiic articles regarding this subject and I only found a few forum discussions where people were wondering if their partner had cheated on them because of antidepressants.
0 more posts in this thread. [Missing image file: image.jpg]
Alright, I'm having trouble with Calculus I (super-pleb here). If any of you poorfag /sci/entists would like to make a quick $10, you can email me and help me out. All i need is to concieve an understanding of a few examples of limits and the methods used to get to the answer. You will only be paid (via paypal) if you actually help me, if you want 10 bux just email me inb4lock@hotmail.com

Hi

2 more posts in this thread. [Missing image file: untitled.jpg]
Hi dear /sci/. I study electrical engineering and till now math has been pretty mechanical to me ( you know plug and calculate way). Problem was that in high school, middle, elementary it was always plug and chug approach and I would solved math without big problems even in my college. I was pretty lazy before college and I do have some holes in basic math ( it is not like I do not know how to solve fractions or anything like that, but I do have some holes) . Not long time ago I found this guy http://betterexplained.com/ and it way like blind man first time seeing world around it. I hate things which I can not explain to me in simple language but this guy is a pro in explaining a lot of things in easy way and I fell in love with math. OK what is my question? Is it possible to explain everything in such easy and intuitive way? What book would you recommend for covering my math basics?
0 more posts in this thread. [Missing image file: untitled.png]
it's HAPPENING!!! Google is curing death http://business.time.com/2013/09/18/google-extend-human-life/

Horticulture

1 more posts in this thread. [Missing image file: plant_tissue_culture_jars.jpg]
I'm starting my bachelor thesis and have an important question. My thesis is about the influence of some fungi on the growth of apple in plant tissue culture (pic related). I'm going to measure the growth with image analysis software. But my question now: How can I statisticaly calculate the number of replicates I have to do in order to get a statisticaly significant result? I have no idea how high my variance and what so ever might be. And yes....my prof is on vacation.
4 more posts in this thread. [Missing image file: ha.jpg]
Working on a symbolic problem dealing with translational kinematics in 1 dimension. Not sure I've done it right. "At time t=0, a student throws a set of keys vertically upward to her sorority sister, who is in a window at distance h above. The second student catches the keys at time t. With what initial velocity were the keys thrown? What was the velocity of the keys just before they were caught?" Being thrown straight up, the keys are affected by gravity, so we can use a particle under constant acceleration model to analyze this. x(f) = x(i) + 1/2( V(i) + V(f) ) * t where x(f) is the the final position, x(i) is the initial position, V(i) is the initial velocity, V(f) is the final velocity and t is the time. h = 1/2( V(i) + V(f) ) * t, 2h/t = V(i) + V(f), V(i) = 2h/t - V(f), V(f) = 2h/t - V(i). V(i) = ( 2h/t - V(i) ) - a*t, 2*V(i) = 2h/t - 9.8m/s^2 * t, V(i) = h/t - 4.9m/s^2 * t, Which is the answer to the first question. For second question, V(f) = 2h/t - (h/t - 4.9m/s^2 * t) V(f) = h/t + 4.9m/s^2 * t That's the anwers I've arrived at. Any way I could refine these answers? Or have I made a mistake?
3 more posts in this thread. [Missing image file: Koala.jpg]
Just curious to know how does the UK's education system from ages 16-18 compare with other countries especially in terms of science and maths. I've heard it's one of the best public education systems available but that's really hard to believe because of the lack of hours in school. Also, how was your educational experience in your country?
11 more posts in this thread. [Missing image file: Big_o.jpg]
How do I determine the Big-O of an algorithm that has a running time like: floor(n) * n *c_1 where floor(n) denotes the highest integer less then or equal to n, and c_1 is just some constant. Specifically I'm wondering what to do about the floor(n), it would be easy if that wasn't there.
9 more posts in this thread. [Missing image file: ape.gif]
Let's say for example that only one object existed in the entire universe. Would gravity exist?

Chemistry mixture problem

9 more posts in this thread. [Missing image file: image.jpg]
Let's say you have a mixture of FeO and Fe2O3 that weighs 10 grams. Complete reduction of said mixture yields 7.28 grams of pure Fe. Given this information, how could one calculate the mass of the FeO and the Fe2O3 in the original sample?
0 more posts in this thread. [Missing image file: AHHHHHHHHHHH.gif]
Fuck. Looks like we have to rethink everything again. https://www.simonsfoundation.org/quanta/20130917-a-jewel-at-the-heart-of-quantum-physics/?utm_source=feedly >The amplituhedron is a theoretical geometric object in infinite dimensional space that dramatically simplifies calculations of particle interactions and challenges the notion that space and time are fundamental components of reality. >When the volume of the amplituhedron is calculated in N=4 supersymmetric Yang-Mills theory, it describes the scattering patterns of subatomic particles. This suggests the possibility that the nature of the universe, both classical relativistic spacetime and quantum mechanics, can be described with simple geometry. Calculations can be done without quantum mechanic's properties of locality and unitarity, which could help investigate quantum gravity theory. It also vastly simplifies the calculations of particle interactions, such that interactions which would require hundreds of Feynman diagrams and thousands of pages of calculations can be computed with a single equation. Since the N=4 supersymmetric Yang-Mills theory is a toy theory that does not describe the real world, the relevance of this theory to the real world is currently unknown, but it provides promising directions for research into theories about the real world.
7 more posts in this thread. [Missing image file: Pallet Jack.jpg]
At my job, I have to move around pallets. One type of pallet we get is a pallet that is roughly 4ft tall and weighs 2450 lbs. Another type we get is roughly 7ft tall and weight 2950 lbs. The heavier pallet is much easier to move than the lighter pallet. Obviously, the height makes a difference, but in what way?
4 more posts in this thread. [Missing image file: slug..png]
My physics class have been tasked with finding out the definitions/uses of 10 "obscure" units of measure, clo, olf, tod,stere, quintal,dol, slug, barn,jerk, and kilogirl year. I have the first 8, but can't find anything on jerk as a unit of measure, or even the existence of a kilogirl year.






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