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/sci/ Science & Math

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Most viewed threads in this category

Why is linear algebra so damn boring?

45 more posts in this thread. [Missing image file: url.jpg]
How do you force yourself to work through mountains of boring mathematical shit when they're a prerequisite to more exciting topics? I'm trying to refine my scientific knowledge and I thought it would help to learn linear algebra. I knew it would be painful but I never expected this. I can barely stay focused. It's not like I'm not learning, it's just impossible to get into it and enjoy it on any level. Every inch I gain takes a monumental effort of personal discipline. I know for a fact that not all mathematics are like this. I actually enjoyed calculus to a degree. But linear algebra seems like the most frivolous axiomatic shit I've ever had the ordeal of studying. I'm sure some of you can /sci/entists can relate. How do you cope with this god-awful field? Or any topic you need to get through?

How do I determine if 'nofap' is pseudoscience?

6 more posts in this thread. [Missing image file: nofap.png]
I'm only just entering undergrad, and I stumbled across this group that gives off the vibe of a cult called 'nofap.' Their homebase is a section of reddit called r/nofap, and they claim things like "if you don't fap for about 90 days, your brain will reboot itself to its normal state" "by not fapping for an extended period of time, I notice girls are more attracted to me, and I get boners more often, and I actually grew to like them" "i have more energy due to higher testosterone, and I felt the effects of nofap even before I found out about it" Of course, these are all paraphrisations, but I want to know what /sci/ thinks. There must be trained physiologists here, right? http://www.reddit.com/r/NoFap/ http://yourbrainonporn.com/your-brain-on-porn-series https://www.youtube.com/watch?v=wSF82AwSDiU
13 more posts in this thread. [Missing image file: images224680_h1n1.jpg]
So wait... There's actually evidence that suggests that Narcolepsy-Cataplexy in kids who took the H1N1 vaccine might be due to said vaccine? >http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0033723 >>PLOS lel >http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2954689/ I only see hypotheses, but how real could the connection be?


11 more posts in this thread. [Missing image file: The_zombie_apocalypse_zombies_.jpg]
Okay guise, I'm working on a book about a zombie apocalypse, I'm leaning toward some sort of biological outbreak as the cause but need a convincing situation for something that wipes out the world in a matter of days*. Would there be a cure? Should there? What would you think a convincing method for a cure, could it be made at home? *It's theoretically possible, an infection rate of 90%, mortality rate of 90% an incubation length of 7 hours will infect the world in less than 48 hours. http://www.ft.com/cms/s/0/965eb33e-8112-11de-92e7-00144feabdc0.html

Calculus 3

11 more posts in this thread. [Missing image file: jakiro_by_fuckingmoreevil-d5rd7sf.jpg]
Hi guys, I'm piss poor atm and I can't afford my next calculus text book, could anyone maybe help me find it for free online? Calculus, Early Transcendentals, by Anton, Bivens, and Davis, 9th edition, John Wiley Pic Unrelated


6 more posts in this thread. [Missing image file: Tetrahedron.svg.png]
how smart it /sci/? this was the second problem of a midterm i took four days ago. are you smarter than a college freshman? Find the location of the centroid of a tetrahedron. I want the tetrahedron to have one face in the x,y plane and one vertex at (a,0,0). Two other vertices are located at (-a/2, a * sqrt(3)/2, 0) and (-a/2, -a*sqrt(3)/2, 0). You have to find the 3rd vertex yourself (as well as the location of the centroid). During the course of this problem, you will have to compute the volume of the tetrahedron. Explicitly compute the volume of the tetrahedron. Finally, what is the radius of the smallest sphere which contains this tetrahedron.
7 more posts in this thread. [Missing image file: Untisdagdhafhfdtled.png]
What is the full chemical equation for Rochelle salt + copper sulphate + hydrogen peroxide? You can see it here: http://www.youtube.com/watch?v=muE1wPzr398
24 more posts in this thread. [Missing image file: ball with a hank on it.jpg]
How do you get motivation to do work for long lengths of time?
16 more posts in this thread. [Missing image file: act.jpg]
So how well did you guys do on the ACT? I bombed that shit and now I go to a shitty community college. How'd you do on it and how'd you prepare?
24 more posts in this thread. [Missing image file: 1361512898885.jpg]
calc 3, differential equations can i take both at the same time? also should i take linear algebra first?
165 more posts in this thread. [Missing image file: 1010552_614563838564631_1405613008_n.jpg]
ITT: science humor post you're science jokes
8 more posts in this thread. [Missing image file: oscar.jpg]
So uh, got a math deal that is confronting me. Seems like it would be a decent word problem. I currently have one oscar fish in an aquarium. I would like to add another. Oscars are monomorphic so you cant tell males and females apart, and if you end up putting two males together they will fight to the death. If you put two females together you have a 90 percent chance of them successfully living together. If you put a male and a female together you have a 75 percent chance of them successfully living together. I would greatly appreciate it if someone could tell me what my odds are for having a successful two oscar tank if i go out and buy another one today.
3 more posts in this thread. [Missing image file: 1362893317851.gif]
I'm trying to prove that n|(nCr) (for all r) if and only if n is prime. (1<=r<=n-1) Now proving that if n is prime then n|(nCr) is pretty easy, but how would you go about proving that n|(nCr) only if p is prime? Could you show that if n is not prime, then there exists an r such than n does not divide (nCr)?
6 more posts in this thread. [Missing image file: euleryo.png]
What is your favourite math methods book? Primarily aimed at a physics audience.
0 more posts in this thread. [Missing image file: creepy jordan.jpg]
Didn't see a Medicine board so I figured this was the best place. My mom came home today and said she has to go in for a CAT scan tomorrow, because she has an "abnormality on an artery" in her brain. What could that be?
4 more posts in this thread. [Missing image file: 1377110108338.png]
>NASA xenon-ion magnet field thrust engine >there is enough harnissable energy to power the world thousands of times over in just one year >tfw if the world stopped being greedy we could've focused on building sustainable energy sources everywhere >tfw if the world stopped being greedy we could've built machines to automate the majority of jobs >tfw if the world stopped being greedy we could've ended poverty >tfw if the world stopped being greedy we could've worked together to create awesome technology and visited other planets and galaxies >tfw if the world stopped being greedy we could've contacted intelligent extraterrestrial life forces

ketiig faintness

10 more posts in this thread. [Missing image file: bateman33.gif]
Why isn't there a proper cure for baldness yet /sci/ that I can just go and buy in a pharmacy. It's 2013. It shouldn't have to be this way.
12 more posts in this thread. [Missing image file: Artist.jpg]
Are emotions inherently irrational or what?
50 more posts in this thread. [Missing image file: rash.jpg]
Diagnosis time /sci/. Itchy rash being the only symptom aside from diarrhea which is most likely unrelated. Starting on the chest and neck, the rash has spread onto the lower half of the face along with over the entire torso and slightly down, starting on the extremities. Pic related. Aside from the rash, there are no other typical symptoms of meningitis (Not the right kind of rash), measles, etc. Chlorphenamine (antihistamines) has been administered with no effect.
1 more posts in this thread. [Missing image file: SNC00252.jpg]
Any other botany/growers /sci/? I just fucking love plants, live in hot as fuck So-Cal... can grow just about year round although it gets too hot in the late summer. Step out half plants look like they're just about to go, FUCK!!! Quickly spray with some cool water move out of the sun, go back to looking great right before my eyes. What's /sci/ growing?

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