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/sci/ Science & Math

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Most viewed threads in this category

7 more posts in this thread. [Missing image file: ]
>Its just a theory
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Who wins?
9 more posts in this thread. [Missing image file: ]
If God exists, why would it have anything to do with us? Human religions are obviously statements about our cultures and our values rather than the world we exist in, so if there is a conscious cause to our universe, isn't it likely to be some lovecraftian unfathomable shit that isn't even aware of our existence, us simple time-constrainted 3-dimensional temporary beings?

/class schedule/ thread

73 more posts in this thread. [Missing image file: ]
How's your class schedule looking this year? Pic related my next 2 years of classes (mechE and physics double major master race)
52 more posts in this thread. [Missing image file: ]
What are your thoughts on MBTI?

Projective Geometry Part 0

6 more posts in this thread. [Missing image file: ]
I'm learning projective geometry in my spare time, and supposedly one of the best ways to learn something is to teach it to someone else, so here we are. I will make several large posts in each thread, but with time to respond in between. 'Part 0' refers to the whole thread. ---------------- In Prop I.4 of the Elements, Euclid uses 'the principle of superposition' to prove the SAS congruence theorem. The idea is to change a copy of the space(+objects) and then compare the two. While useful, we will only be using this to get an idea of projective geometry. One thing we can do is see what changes preserve which properties of figures. For example, all changes to a plane that preserve Euclidean properties(length, angle, area, etc.) are composed of at most three reflections on a line. Now consider the following 'change': Start with the xy-plane in 3d Euclidean space. Call this the object plane. True to its name, there are already figures on this plane. The change we wish to make to the copy goes in two steps: 1: A central projection to the xz-plane(image plane) with centre (0, 2, -1). 2: A parallel projection from the image plane back to the object plane with the axis as the line from (0, 1, 0) to (0, 2, -1). The posted picture show how this change moves points around. It will also move any figures around, but what is important is to see which properties of the figures aren't changed. Object plane before change: http://i.imgur.com/lFCanqy.png After: http://i.imgur.com/OyCk1jO.png Each picture is exactly the same scale. The thick black line is the X-axis, and the large blue dot is the point (0, 1, 0) in both pictures. Which properties of figures are changed and which remain the same?

Chesmitry

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Who else thinks that 4chan needs a chemistry board
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>the proof has been left as an exercise for the reader

Geometry

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Could /sci/ help me finish my homework?
22 more posts in this thread. [Missing image file: ]
hit me with the hard truth /sci/ I'm a jobless neet somewhere near halfway through my bachelors in EE; 21, never had a job, hands feel lotioned at all times because they've never had a callous. Am I fucked after I graduate? Am I employable? I mean I plan on going to med school anyway, but I imagine being a jobless neet will fuck me from getting into there too
7 more posts in this thread. [Missing image file: ]
>Consumed LSD >Took 11 years off before he finished his undergrad degree >Majored in Philosophy >Decided to do a PHD in Neurosoup >Is now regarded as one of the Internet's favourite scientists and regularly BTFO's religion. Why is he so amazing?
9 more posts in this thread. [Missing image file: ]
Does physics have a framerate?
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How does Quantum Entanglement not allow FTL communication? I can't understand this.
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If I traveled speed of light, lets say in a capsula orbiting the earth. If I had a webcam and chatted with ppl on earth via skype. what would I see?
7 more posts in this thread. [Missing image file: ]
Is the argument against Free Will robust? Has anyone put forth a counter-argument in favor of free will that is credible?
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What's going on in my brain when it feels like I'm making an effort to do something I don't feel like doing?

Humans without sunlight

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Could humans live and thrive without sunlight, provided they take vitamin D supplements? If not, could sunlight be sufficiently artificially imitated, to the point where it offers the same physical benefits to the human body as sunlight? Lets assume food is not a problem.ents?
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If the big bang started the universe, what happened before the big bang? Who or what caused the big bang?

So what did this guy actually get wrong

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without reverting to "the USSR killed lots of people" what did he actually get wrong ?
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What can we do to stop peak oil?






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