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/sci/ Science & Math

Threads added between 2013/01/16 and 2013/01/23

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Most viewed threads in this category

14 more posts in this thread. [Missing image file: hornet.jpg]
I think I have less muscle control on one side of my face I can curl my lip in one direction on one side and not the other it's a tiny difference, but it's noticeable to me I don't want to be a hypochondriac about it, but I can't think of any reason for it other than a brain problem the rest of the internet wants to tell me I had a stroke, but I'm 19 and healthy
7 more posts in this thread. [Missing image file: DNA.jpg]
Hi guys Whats the difference between a duplication and an insertion?
31 more posts in this thread. [Missing image file: 1356863656330.png]
What kind of laptop should a engineering/physics/astronomy student use for school? Thinkpad? Mac? specifics? budget is <$1000 I asked /g/ but they masturbate over 10 year old thinkpads a bit too much
6 more posts in this thread. [Missing image file: ft_symmetry1.png]
Question: "Prove that the difference between two odd functions is even" http://books.google.com.au/books?id=o2E5HBgXFZwC&pg=SA1-PA38&lpg=SA1-PA38&dq=the+difference+between+two+odd+functions+is+even&source=bl&ots=sRdUST8PAi&sig=8ov8HV36Z5aBsZvPOLs4MyhNwAA&hl=en&sa=X&ei=4eD_UJj6OKWjiAffi4H4Aw&ved=0CHgQ6AEwCQ#v=onepage&q=the%20difference%20between%20two%20odd%20functions%20is%20even&f=false what
14 more posts in this thread. [Missing image file: 1358209151516.jpg]
Is mathematics truly made up? Lately I've been hearing it being argued that we just invented it to understand relationships in the universe. Obviously the symbols, words, and visualizations used to describe the relationships and quantities are made up, but I'm talking about mathematics at its core. I'd think that quantities and relationships between things in our world are because of our dimensional space and laws of physics. Don't they exist whether or not we make them up? i.e. wouldn't an alien race have to come up with essentially the same mathematics to advance to the same level we are at scientifically? I'm not assuming I'm right, but with limited education in mathematics this is where I stand. If anyone with higher education has a better or different answer, I'm all ears
8 more posts in this thread. [Missing image file: 1353238604633.png]
Can I use a microwave in place of an autoclave or pressure cooker in my home lab? I can't imagine anything could survive 5 minutes on high power.

How does sugar preserve stuff

1 more posts in this thread. [Missing image file: image.jpg]
Why don't microbes grow in jam and honey
0 more posts in this thread. [Missing image file: still-11.jpg]
Hey, /sci/, I've been assigned an analytical chemistry report in which I have to find an analyte and its matrix that is applicable to society and describe: a) why society would want to quantify this analyte b) a description of the analyte and its matrix c) how one would isolate the analyte from its matrix to quantify it I thought it'd be interesting to discuss possible topics I'll start with a few examples: >cholesterol levels in blood >mercury in fish tissue >fluoride in tap water >gay in /sci/ >morphine alkaloids in opium etc.
15 more posts in this thread. [Missing image file: blue_energy-blog.jpg]
Please /sci/ help me. I'm struggling to find a formal and definitive meaning of energy, is it just the "thing" that makes matter move or is it just "E=MC2" or it is something else? What in the end is energy? (please no paranormal explanations?
1 more posts in this thread. [Missing image file: 800px-1937-French-cyclotron[1].jpg]
Hey /sci One of my friends and I are making a small cyclotron. We do not have super high tech equipment available as it's is only a high school project(at least that's what i think it would be in America) To measure the speed of the particle once the cyclotron is done, we will be using an electric field to deflect the particles and look at the deflection angle and calculate the speed from that. It would be really nice to have some kind of material that could light up when it's hit by and electron, as that would make it very easy to measure the deflection angle. Do any of you have any ideas as how to make or aqiure such a materiel?
1 more posts in this thread. [Missing image file: TachiBROma.gif]
The hippocampus is the seat of the soul Discuss.
4 more posts in this thread. [Missing image file: ????.jpg]
Please explain to me why you are on 4chan and not studying right this moment.
6 more posts in this thread. [Missing image file: equation.png]
I'm taking a Udacity course, and two equations came up for calculating the approximation factor of two different algorithms (pic related). I feel like a retard, but I can't figure out the second equation: n - k / n - 2k How does this get simplified as 1 + (k / (n - 2k))?
5 more posts in this thread. [Missing image file: CodeCogsEqn.gif]
hey /sci/ i have a trigonometry problem that i can't figure how to solve... here it is: sin(180-x)=sin(180-2x)sin(90-x)+4sin(180-2x)sin(90-2x) pic very related
1 more posts in this thread. [Missing image file: shipping_routes_traffic_density.jpg]
Which is better for study, ritalin OR piracetam/aniracetam/some-racetam? Since they are horrible together apparently.
11 more posts in this thread. [Missing image file: 1357826168782.jpg]
Does /sci/ use adderall? Grad student here who is contemplating using for 1st time. Thing I want to know: 1) Do you retain the info? 2) Does it make it harder to focus without it? 3) Tolerance?
21 more posts in this thread. [Missing image file: EN-Pixelphysics012.png]
21 more posts in this thread. [Missing image file: quantum-immortality-1.gif]
YOUR VIEWS ON QUANTUM IMMORTALITY? I know it is true, I have tried it myself having failed at an heroism with multiple gunshots to the head. some 12 misfires all with different guns. Since there are more than two possible outcomes, I was lucky to the extent I didn't just survive with brain damage, but the guns were all reliable. From your reference frame though, I'm just one lucky bastard. In your reference frame, you are immortal and can prove it to yourself alone. Here is a good description of QI: A man sits down before a gun, which is pointed at his head. This is no ordinary gun; it's rigged to a machine that measures the spin of a quantum particle. Each time the trigger is pulled, the spin of the quantum particle -- or quark -- is measured. Depending on the measurement, the gun will either fire, or it won't. If the quantum particle is measured as spinning in a clockwise motion, the gun will fire. If the quark is spinning counterclockwise, the gun won't go off. There'll only be a click. Nervously, the man takes a breath and pulls the trigger. The gun clicks. He pulls the trigger again. Click. And again: click. The man will continue to pull the trigger again and again with the same result: The gun won't fire. Although it's functioning properly and loaded with bullets, no matter how many times he pulls the trigger, the gun will never fire. He'll continue this process for eternity, becoming immortal.

Are robots hurting job growth?

61 more posts in this thread. [Missing image file: rethink-robotics-baxter-worker-robot.jpg]
We're not going to run out of jobs, right? .....RIGHT? http://www.cbsnews.com/video/watch/?id=50138922n
5 more posts in this thread. [Missing image file: ugh1.jpg]
I have some excel/math problem. I made a basic calculation relating to banks and finances. My problem is that I want excel to give me a sum of the amount I say it has to give me but I don't know how I could calculate that. So basically, if H14 = 10, then I want H15 showing me the sum of C3:C13






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