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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?
5 more posts in this thread. [Missing image file: Koala.jpg]
Hey /sci/, help me out. My textbook says the Lewis structure of CH2NH2 is: CH2 -- NH2 (lone pair on N) <--> CH2 == NH2 How is this right? Why is it a resonance structure when in the first one, carbon doesn't even have an octet? Shouldn't it only be the one with the double bond?
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?
9 more posts in this thread. [Missing image file: Untitled.png]
Tell me everything that is going to happen to me after I ascend please. Sorry if i posted this before and got an answer, I forgot, I hopefully won't make that mistake again by recording the answer. If you don't know what I'm talking about please ignore me.
8 more posts in this thread. [Missing image file: 1370552227307.png]
>going through python learning book >unbelievably boring >open MATLAB learning book >incredibly boring, have to stop instantly >open engineering mathematics textbook >I'm confident in learning it when the need arises but I'd just forget everything I learned now within a week because I wouldn't use it >open thermodynamics textbook >similar to the maths one >learning language >meh progress but it's at least steady I get good uni results but that's basically the summary of my summer. I haven't learned shit apart from progress in the language. The entire /sci/ sticky must have been a waste of time. I bet no one has used any of the resources for more than 10 days in a row. I don't believe anyone here, you'd have to be a literal autist to self study most of this stuff. Why would you learn some trick to solve a second order differential equation and try to memorise it when you could look it up when the need arises? I keep beating myself up for not turning myself in to super-intelligent-man in my spare time. Yet I also know that it's unlikely that any of this shit could ever come in useful. Could I ever learn a second language or programming language enough that it can help get me jobs? If I hate learning programming, wouldn't I hate the job it gets me? This entire summer I haven't even been able to appreciate my fun time as well. I just start reading a novel and instantly feel guilty because it'll never help me get a job or add to my cv.
11 more posts in this thread. [Missing image file: Screen Shot 2013-09-16 at 4.16.17 PM.png]
wtf is this. nomenclature.
2 more posts in this thread. [Missing image file: mangs.gif]
Hey /sci/ bit of an odd question. I recently got onto a adult learning course, I had spent the last few years working and thought studying science was cut off for me but this course has opened up some great new opportunities for me. The course is level 3 science and leads onto a foundation degree. I asked my tutors but they were fairly clueless as most people on this course go onto do nursing and teaching. Is doing physics at university cut off for me? As great as this course is, I have no education apart this course and personal study over the years. What I am worried about is firstly the course is pretty much a year long cramming course and I don't think in a year I can really catch up to the level needed for physics. Most friends I know did GCSE physics then A levels which is about 3-4 years of study before hand. Secondly I am not that great at math, I am willing to put in the time needed but I am simply not that great at it. Would it be more realistic to set my goals lower and go into a lower branch of science? Sorry for the long post just we are starting to apply to uni this year and the tutors are not being very helpful.
41 more posts in this thread. [Missing image file: doc.png]
What do you think /sci/?
15 more posts in this thread. [Missing image file: 1374957863880.jpg]
Which are the effects for health if unrequited love? Is it a real problem or just created by society?
15 more posts in this thread. [Missing image file: 1335139562114.jpg]
Niggers are objectively the dumbest race, reasons and excuses unrelated to their genetics you want, but they are after all. Discuss.
7 more posts in this thread. [Missing image file: pittetwillis.jpg]
Is time travel real?
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?






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