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/sci/ Science & Math

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Most viewed threads in this category

8 more posts in this thread. [Missing image file: 94054-500w.jpg]
Why do white people have strong chins, and african people have none ? Does it serve a purpose somewhere ?
14 more posts in this thread. [Missing image file: 081.gif]
why is physics so fucking hard /sci/ im in first year engineering, and while chem and math are coming along easily (quantum mechanics, derivatives and so forth), physics is raping me in the literal asshole I did well in phys 12 in HS, (90%), we went over all of classical mechanics including EM and Circuits. I thought it wouldnt be this hard but holy fuck this shit gets retard complicated. Any tips for excelling in physics? I tihnk some people have the same problem with math. People in my calc class are running into magnitudes of difficulty, but for me it's very straightforward because it's juts one thing. But with physics, it's either my teacher or my curriculum, but everything is one jumbled fucking mess. For instance, my first midterm is on ALL classical mechanics. Taking first year physics w/ calculus usage.
2 more posts in this thread. [Missing image file: 1356844542378.gif]
>Let X = (xn) and Y = (yn) be given sequences, and let the ‘‘shuffled’’ sequence Z = (zn) be defined by z1 = x1; z2 = y1; . . . ; z2n-1 = xn; z2n = yn; . . . Show that Z is convergent if and only if both X and Y are convergent and lim X = lim Y. I'm not sure how to prove this. Proving Z is convergent implies X and Y are convergent with lim X = lim Y is easy, since all subsequences of a convergent sequence must converge to the same value. But how do you prove the converse?
0 more posts in this thread. [Missing image file: 4390883+_b25d4fb9b6addb293d39570b59(...).png]
How would you chose to parameterize the surface of a tetrahedron formed by: z = 0 y = 0 x + z = 1 x = y ? I need to calculate an integral over this surface but I'm tired and can't seem to get the paramterization right.
7 more posts in this thread. [Missing image file: jacob_barnett-222x300.jpg]
>Jacob Barnett is a 13-year-old child with Asperger’s syndrome who is currently being recruited by Indiana University-Purdue University Indianapolis (IUPUI) for a paid research position. Why? Because he has far surpassed the level of what college professors can teach him and university officials believe that Jacob’s skills would be more useful in a research environment. >In some ways, Jacob is a typical 13-year-old. He has a steady girlfriend and recently attended his first dance. He plays basketball and loves playing video games, especially Guitar Hero and Halo Reach. That is where the comparison stops. At the age of three, Jacob was not talking or making eye contact. He was diagnosed with Asperger’s syndrome and found to be far above his age level in academics. >He has a steady girlfriend and recently attended his first dance. >girlfriend Just because Jacob Barnett is a child prodigy and a genius who will probably win a Nobel Prize before he is 20 doesn't mean you need to bash him out of jealousy. A lot of people say he is socially inept, but he has a girlfriend at 13 which is the normal age most people get their first girlfriends. Most of you are probably more autistic and socially inept than Jacob Barnett, but you don't have the genius to go along with it. I bet some of you are even virgins. They say Isaac Newton advanced society by 200 years. Jacob Barnett is so smart that he will advance society by 500 years.

Philosophy of Mind

13 more posts in this thread. [Missing image file: mindbody2.png]
What is substance dualism? Give the main reasoning /arguments for it, and critically assess whether those arguments work or not and why they work, or not.

Eyes test

32 more posts in this thread. [Missing image file: Screen Shot 2013-10-05 at 12.38.20 PM.jpg]
/sci/, can you really tell inner feelings of a person – to a high degree of granularity – as this pic from a test suggests? I'm not autistic, but holy fuck, as a man I have hard time with this test. Some emotions are easy: fear, surprise etc… but some like in this pic are impossible for me.
48 more posts in this thread. [Missing image file: Micahs fish.jpg]
/sci/ I goofed. for the past 6 years I have grown comfortable with sliding by on my intellect, not striving to achieve anything in school/work/life other than high arena ratings in WoW and high K/D in Dota. I don't want that, I want to achieve things in this life, and I know I have the capacity for it. I have no skills at 21 years of age. Any tips on how to get back on track? How far fucked am I if I want to learn saaay piano. I know it is better late then never but I feel like I have lost a clear opportunity. TLDR: I've grown to be lazy and just slide by can I fix myself and how.
2 more posts in this thread. [Missing image file: SadRalph.jpg]
Why live on when one can do nothing, create nothing, enjoy nothing?
7 more posts in this thread. [Missing image file: 1369581877579.gif]
Hey guys, Can somebody explain the difference between Effusion and Diffusion of gases for me? I dont really understand the explanation nor the picture wikipedia gives (I'm not a native English speaker but I think it's vague anyway) >The image in the left shows effusion, where the image on the right shows diffusion. Effusion occurs through an orifice smaller than the mean path of the particles in motion where diffusion occurs through an opening in which multiple particles can flow through simultaneously.
4 more posts in this thread. [Missing image file: mfw.jpg]
>mfw even though I already knew the moon is the same apparent size as the sun, ice is less dense than water, and the speed of light is a million mach .... 2 AU = one light second chekmate atheists

abundance of elements

4 more posts in this thread. [Missing image file: PeriodicTable.png]
Why is there more of carbon and oxygen than say lithium. Lithium is lower on the table so one would think It would form via fission first and would be more abundant but this is not the case. Does it have to do with these elements fussing more quickly or perhaps form less readily/easily.

mech of materials

1 more posts in this thread. [Missing image file: Black-Hole-ESO-243-49-HLX-1.jpg]
so we have a prismatic bar that's fixed, ignore self-weight. there are 4 steel rebars in the concrete bar, there is a load 2P going in one direction of the bar. how do i solve the reaction forces. assume we know the area and elastic modulus of the concrete bar and the rebars
1 more posts in this thread. [Missing image file: american science.png]
what is your favourite pop-science magazine? Science Illustrated? Scientific American? etc etc...
23 more posts in this thread. [Missing image file: lhc-hires-0610026_02-A4-at-144-dpi.jpg]
The large Hadron Collider is such a fucking waste of money. I live in the UK and it costs us fucking £34 million a year. How is this justified?
21 more posts in this thread. [Missing image file: 1380994081108.jpg]
post your research interests here: -systems biology -tissue(neuronal specifically) engineering -synthetic genomics >tfw working with boring gmos >tfw best thing I will give to humanity is some crappy crop or a bacteria that excretes enzymes >tfw born too early to play god in sandbox mode >tfw I will never develop my own genes in my lab and then proceed to insert them in my genome >tfw I will never be in the cover of the times magazine with the headline "MUTANTS AMONG US" >tfw the ethics committee blocks all my interesting research proposals >tfw I secretly wish Hitler had won the war so that we had an ethics comitees-free transhumanist research agenda
3 more posts in this thread. [Missing image file: e349df3c-efc6-4fc6-9afd-757812967900.png]
Why hasn't cyclopropatriene been synthesized yet? What makes it difficult to produce? Also, why can't there exist liquid diamond in normal conditions?

Distributivity of the dot product

3 more posts in this thread. [Missing image file: b868d15523374015b03a588d81bc66c4.png]
Lately I've been wondering how to prove geometrically the law of distributivity on the dot product (algebric proof is pretty smooth!) Anyone as an idea?
11 more posts in this thread. [Missing image file: image.jpg]
How much pages of an average book should I be able to read per hour? I'm 19 and I can only do 20-30. Am I stupid? If its a STEM text book then I can do 8-15. My uncle claims he read 3 lines at a time and finishes books I'm one sitting. Bullshit, right?
7 more posts in this thread. [Missing image file: ufo space alien star ship.jpg]
Let's talk about stars and flying cars, robot people, laserswords and shit.






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