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/sci/ Science & Math

Threads added between 2012/09/26 and 2012/10/03

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Most viewed threads in this category

12 more posts in this thread. [Missing image file: ttw.jpg]
the best episode of through the wormhole in your opinion ?
6 more posts in this thread. [Missing image file: coppin a feel.gif]
What unit is malleability measured in?
5 more posts in this thread. [Missing image file: fin_1_wf.gif]
I'm having problems with this. Image is related. I've worked out the following: Boundaries: + and - 400 picometers Wavelength: 1950 picometers. With this information, how can I answer the following questions? 1) What is the approximate kinetic energy of the electron inside the well? Kinetic energy = _____eV. 2) Now consider an infinite square well potential of the same width L. When the electron is in the ground state of this infinite well, is its kinetic energy higher or lower than its kinetic energy in the ground state of the finite well? Is it higher or lower? 3) If the electron were in the ground state of an infinite square well of the same width L, what would be its kinetic energy? Its kinetic energy = _____eV. I would really appreciate if anyone can help or provide insight into this.
15 more posts in this thread. [Missing image file: physics.png]
How many revolutions does the object make during the first 4s? [please explain how you got your answer]
5 more posts in this thread. [Missing image file: 1335469973446.jpg]
Horrible programming student here. I have to make an 8x8 checkerboard using python & this graphics module a professor made. As of right now this is what I have from cs1graphics import * paper = Canvas(400,400) blackSquare = Square(50, Point(75,25)) blackSquare.setFillColor('black') paper.add(blackSquare) I know I need to use the modulus operator (%) within a loop to make it so that it inserts a black square in every even square, but I can't think of how to do this shit to save my life right now. After I put down the squares in a loop I have to actually put checkers on the image, but I think after I actually understand how to loop in the black squares I'll understand how to do that. Help?
14 more posts in this thread. [Missing image file: hshs.png]
Damn't man. I have a physics test tomorrow and I got behind studying other stuff. I can't figure this simple problem out and can't find an explanation anywhere that makes any sense. Can one of you hep? If Vector B is added to Vector C = 3.0i + 4.0j, the result is a vector in the positive direction of the y axis, with a magnitude equal to that of Vector C. What is the magnitude of Vector B? I know how to get the magnitude with the C vectors I just can't figure the whole picture out. If anyone could just explain what the problem is saying I might be able to get it.
155 more posts in this thread. [Missing image file: girls cannot into physics.png]
http://www.bbc.co.uk/news/education-19603399 Why is there more female interest in Biology than Physics?
47 more posts in this thread. [Missing image file: cc.png]
Is it possible to visualize a 4th primary color?
22 more posts in this thread. [Missing image file: video_games_real_halflife_gman_candid.jpg]
Do Asians being complete bell curve destroyers in any quantitative course mean anything? They are monsters in maths test, yet I find very little else from them. Most of them couldn't relate even half the maths they know to outside the classroom. Is the so-called Asian maths genius just overrated?

sociopath and narcissist dicuss

7 more posts in this thread. [Missing image file: mizore.jpg]
people often actually dont know the difference between the two. i am a sociopath as i have diagnosed(not sure if that would be the right word) by me psychologist and i believe that it would be interesting to read discussions about the two in general. i would like the opinion of people who are knowledgeable but idiots can be occasionally amusing
6 more posts in this thread. [Missing image file: ngbbs473643d1a8a5f.jpg]
>www.youtube.com/watch?v=gxJ4M7tyLRE According to this dude, the sky is dark at night because all of the light that reaches us from distant systems and galaxies has faded into infrared, so we just can't see it. If that's true, then do creatures who see in infrared live in constant, blinding daylight 24/7? Are there actually any creatures who see in infrared?
0 more posts in this thread. [Missing image file: 292906_457348690954903_698407006_n.jpg]
Hey! I am looking at different Penicillins and am not sure why Penicillin V can be taken orally and Penicillin G cannont. I understand it has to do with acid stability and the breaking of Beta Lactam. And I understand that Electron Withdrawing Groups on the side chain increase acid stability. But if i was to look at a new penicillin, how am I able to tell whether it is a good Electron withdrawing group, and therefore able to be taken orally?

A* path finding

10 more posts in this thread. [Missing image file: situation1.png]
I'm writing a tower defense game in Python as my way of learning the language! So far, it's coming right along. But I've ran into a situation that has left me confused. The cyan squares represents the current shortest path, the violet squares represent paths the algorithm has tested, and the dark gray squares are walls. So currently, the algorithm has backed the "best path" into a corner. What would the A* algorithm do here?

bump

1 more posts in this thread. [Missing image file: 599044_10150966932334670_1346030844_n.jpg]
bump
1 more posts in this thread. [Missing image file: 0022[1].gif]
If i increase the voltage in a reverse biased PN junction, then the minority charge carriers go from P to N. does that mean its conventional current is from N to P

Derivative...

6 more posts in this thread. [Missing image file: Screen Shot 2012-09-30 at 6.19.28 PM.png]
Can anyone derive this for me, I've been going at it for about an hour and I keep getting a different answer than what Wolfram Alpha tells me.

Half-lives

3 more posts in this thread. [Missing image file: half-life-2.jpg]
I don't understand anything about them. Someone explain them in basic terms? Pic somewhat related
19 more posts in this thread. [Missing image file: 1346583174180.jpg]
Could someone please share a formal proof for this? (-x)^3 = -x^3 pic unrelated
10 more posts in this thread. [Missing image file: chem e.jpg]
Is chemical engineering a very stressful job? I'm pursuing it, but I have generalized anxiety disorder and can not handle high stress levels at all. Should I switch to comp sci? I've been considering that due to low stress levels, but chem E has better wages, better hiring outlook, and is more interesting to me. Difficulty understanding the material is a non-issue for me, the problem is with large workloads and deadlines.
2 more posts in this thread. [Missing image file: jesusponies.jpg]






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