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/sci/ Science & Math

Threads added between 2013/07/03 and 2013/07/10

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Most viewed threads in this category

noko

6 more posts in this thread. [Missing image file: leafcutter_closeup.jpg]
Ants. Plenty of 'em. Very insignificant. Very isolated perception. Humans. Plenty of 'em, less than ants though. Insignificant. Isolated perception. Does perception on a larger scale combined with amounts of a being directly correlate to the significance of said being?

Class Schedules

0 more posts in this thread. [Missing image file: Screen Shot 2013-07-10 at 2.24.26 PM.png]
post 'em if ya got 'em >inb4 pre-reqs
4 more posts in this thread. [Missing image file: hensley.jpg]
Science Tuesdays Faggots! Don't Fuck with the Hens!

help identify bands on molecular marker (SDS-PAGE)

4 more posts in this thread. [Missing image file: 970240_4361918185775_493510312_n.jpg]
the gel seems to have overrun and instead of 9 bands, the marker only has 6. how do i identify the standard molecular weights? (mol marker on leftmost lane, samples are blood serum)
10 more posts in this thread. [Missing image file: Normal force.gif]
Does the magnitude of normal force change with respect to angle? That is to say, if I want to find the components of the normal vector, would I apply trig functions a second time and get mg<cos(t)cos(t), sin(t)cos(t)>? Or is the magnitude a constant mg?

Fucking up the Earth

24 more posts in this thread. [Missing image file: we got science.jpg]
Hey /sci/, I started taking a summer Econ class. I noticed that alot articles we read about resources, and how renewable they are, usually favor the side that says "The earth maybe has ran out of some resources compared to years before, but we aren't running out of them now." But for the past few years the media has been saying that we are running out of resources. They seem to think that if resources start to deplete Supply and Demand will people not to use the rare ones as much. This may work, but would the resources be able to bounce back?I'm not saying we are doing good to the Earth, but are we doing as much harm as we think we are? tl;dr How bad are we fucking up the Earth if we even are? I can supply sources from the Econ side if needed.
4 more posts in this thread. [Missing image file: mutton.jpg]
i started applying minoxidil 5% (rogaine) to my face twice a day to improve the density of my beard. it looks like pic related but not as thick. i didn't have any beard hair at all except for chin until i turned 24 anyone know if the effects are only temporary? it seems to be working a little after about a month
6 more posts in this thread. [Missing image file: Naked_Mole_Rat_Eating.jpg]
Are emotions purely physical phenomena? For example, anger is accompanied by a racing heart and restlessness, sadness by crying and weak limbs, etc. Is it possible that emotions are purely the sensation of experiencing these physical symptoms?
10 more posts in this thread. [Missing image file: 1373014246644.png]
2 more posts in this thread. [Missing image file: 1367990821498s.jpg]
Chemfags. I need help calculating the lattice energy of Magnesium Bromide I have an exam tomorrow and this is most definitely gonna be on it. I really need to understand this. I don't exactly understand how to set it up Please help =( ok ?H of sublimation of Mg is 147 kj/mol ?H bond energy of Br2 is 193 kj/mol first ionization energy of Mg is 737 kj/mol second ionization energy of Mg is 1450 kj/mol Electron Affinity of Br is -331 kj/mol ?H of vaporiztion of Br is 31 kj/mol ?H formation of MgBr2 is -381 kj/mol Please help

noko

12 more posts in this thread. [Missing image file: galois2.jpg]
Why can't we divide by zero? Some time ago we couldn't take the sqrt(-1). Well of course the divison by zero produces 1=2, but isn't it maybe possible to solve this problem somehow otherwise? Another thing that engaged me is the following: Can we produce a new operation to calculate after addtioni, multiplication and exponentiation? To create kind of new numbers. Write down your thoughts. Oh and have a nice day! Sincerely, Anon Pic: There are no arithmetic logarithms!
29 more posts in this thread. [Missing image file: 1372637838939.jpg.gif]
http://dc.streetsblog.org/2013/07/01/the-exaggerated-benefits-of-electric-cars/ So, is electric vehicles really viable alternatives for the future?
8 more posts in this thread. [Missing image file: 1370843464956.jpg]
Why are we so lazy? Today when I woke up, I spent almost an hour laying in bed thinking about a girl. Is laziness something in itself, or is it the result of some "lack?"
1 more posts in this thread. [Missing image file: perfoct.gif]
What's a simple tool for drawing polygons by connecting points described by 3D point vectors? Pic related, I want to draw simple 3D models of pyramids made out of combined triangles and a base plane.

Physics textbook and video series recommendations

6 more posts in this thread. [Missing image file: Physics.jpg]
>tl;dr pls recommend the best physics textbook and video series I'm learning physics I'm in the last year of high school (18 btw, pls don't ban me) My textbook is awful It's full of mistakes It's explanations are awful They use poor notation (for example, not once do they use arrows over vector symbols, and they never seem to use subscripts, and sometimes their formulas appear to have errors in printing) I've been watching Khan Academy videos, and while they sometimes explain things very well, at other times he seems to fumble around and leave out formulas. I tried watching the first few MIT physics lectures. While I already understood the concepts they were teaching, I found his explanations needlessly convoluted and complicated. So, can anyone recommend the best physics video series and textbooks? I've checked the sticky, but there are just so many options that it's hard to decide
2 more posts in this thread. [Missing image file: 1-Danish_Military_Police.jpg]
I know this may not be the place for it, but does /sci/ have any experience in the military? Whether it be mandatory enlistment or voluntary, would you guys mind sharing your experiences?

pdf

0 more posts in this thread. [Missing image file: 9780273752011.jpg]
Hi, guys, maybe it's not related topic, but I need a little bit of help... If someone could find me link for pdf Book: E-Business & E-Commerce Management, 5th edition by: Dave Chaffey Need to do paper for my exam so I'm running low on time... Thx
5 more posts in this thread. [Missing image file: url.jpg]
How neon signs work? What can colors generate?
13 more posts in this thread. [Missing image file: themfeels.jpg]
I got a B in a general chemistryI class at my university even after the prof dropped the lowest exam grade(we had 3) along with homework grades. Should I just give up now as a chemistry major =(
5 more posts in this thread. [Missing image file: muh-singularity.jpg]
uh... you guys know the singularity has already started, right. we inside of that big hairy bitch right now. see the attached pic and let me know if any questions.






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