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/sci/ Science & Math

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Most viewed threads in this category

0 more posts in this thread. [Missing image file: image.jpg]
Does anyone have a pdf for the solutions manual for Thomas Sibley's Foundations of Mathematics? Taking a proofs class now and it would be much appreciated.
16 more posts in this thread. [Missing image file: 26soul.xlarge1.jpg]
I'm a college freshman, and in my philosophy class the professor asserted his belief that mental activity is not solely the actions of the physical brain; a soul exists separately from the brain that is responsible for our rationality. If you guys would like a bit of rage, here is the email he sent all of us after class after I and a group of other students raised a disagreement: Suppose all of our mental activity is identical with activities in the brain. In other words, suppose that when I say, “I am angry,” what I mean is “There are neurons in my brain doing things that are anger.” And when I say, “I have an idea of trees,” what I mean is “there are chemicals in my brain which are tree-thoughts.” Now, this is an unusual claim. Neither many philosophers nor many neuroscientists subscribe to it. Nor would a person who feels he has been wronged by another be comforted by the words “those feelings of being wronged are just brain chemicals.” Nonetheless, it is a position held by many non-philosophers. But just what does the view entail? One thing it would have to entail is that beliefs are brain acts. So, the belief that all mental activity is brain activity turns out to itself just be a brain act. And since I take knowledge to be a mental act, knowledge is a brain act. But this raises an important question: How could anyone know (that is, have a certain sort of brain act) that knowledge is a brain act? Presumably, the brain acts that correspond to beliefs would not be the same sorts of brain acts that correspond to knowledge, since not all beliefs constitute knowledge.
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use n-propyl to differentiate from iso-propyl, I think you got the structure right
9 more posts in this thread. [Missing image file: 374429_10151565933451840_659866277_n.jpg]
Im doing a report on e. coli growth rate with fresh vs halffabricate groceries however this is my first time dealing with bacteria, how long would it take to have a decent growth that i can observe just with my eyes? temperature around 37 celsius (optimal)
2 more posts in this thread. [Missing image file: hologramcuz.png]
Bionerds,biochem nerds, and /sci/ nerds in general. Is it scientifically possible to genetically engineer a human female to certain specifications and utilize accelerated growth so it can reach maturity (18) in less than a year?
0 more posts in this thread. [Missing image file: 1374345800700.gif]
Physicists accept that eventually everything in the universe will reach a state of thermal equilibrium with everything else. Is there any way we can overcome the heat death? I've heard about creation of particle/antiparticle pairs. If we can do that on a large enough scale and prevent them from colliding and annihilating, could we 'fuel' our civilization indefinitely, according to current wisdom? If multiverse theory is true, perhaps it can be possible to transport matter or energy from one to another?
2 more posts in this thread. [Missing image file: 1320341105785.jpg]
If dy/dx = (x^2) * (exp^y) what does y equal to?


9 more posts in this thread. [Missing image file: city rain.png]
Need help finding the code I've been playing a game, much like SimCity, and I got to make a presentation showing how the game works. I want to find the codes that control the game, where do I start? pic related, the files of said game if you can't understand the portuguese parts, feel free to ask :)
6 more posts in this thread. [Missing image file: vLYLQ.gif]
Alright, so im shit at math. I know it and i accept it. But im going into college, and the only good professions are things that require pretty advanced math. Where would be a good place to learn starting from algebra? On the internet of course.


45 more posts in this thread. [Missing image file: holscipres.045.jpg]
I Would like to learn some programming languages, but I want to know what programming language should I learn first?
3 more posts in this thread. [Missing image file: Sr3CuIrO6.jpg]
Hey /sci/, have you heard much of Sr3CuIrO6? I'm curious because apparently this compound is supposed to result in magnetic properties among non magnetic materials. https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&ved=0CDYQFjAB&url=http%3A%2F%2Fphys.org%2Fpdf274607239.pdf&ei=JFJLUqvJLK684AOaiYGgBw&usg=AFQjCNEOjT2UkeKd7fAaleTbs07x2j3cTg&sig2=QbM3Y5lK1Rt5x6gjqzOzFg >(Phys.org) —An unexpected magnetic behavior within Sr3CuIrO6, a transition-metal compound (TMC) that combines the transition metal copper with the transition metal iridium has been revealed by research at the U.S. Department of Energy Office of Science's Advanced Photon Source (APS). These results indicate that mixing certain transition metal systems can yield TMCs with surprising physical properties unattainable with these systems alone, and may eventually lead to new materials for applications such as electronic memory devices and quantum computation. I'm only a Organic Chem 2 student as of right now and do not understand a lot about the physical properties of compounds once it starts getting into d orbitals which this compound does. My roommate was looking into this because he saw somewhere that Israelis are a major dealer for this compound which is really expensive to major countries like the U.S. and Russia for "antigravity" technology or for it's unusual magnetic behaviors. Can you fill me in on this and why this can't be anything to create an "antigravity" field around it?

and equation that i dont quite know how to acheaive the answer for

7 more posts in this thread. [Missing image file: 1366412234080.jpg]
ok so you just got an electric bike ok and lets say about 9 batteries fully charged a full charge for a battery will get you 250miles but you can only travel 70 miles per day and you will lose 3 miles worth of charge overnight now after every time you charge your batteries you will lose 20miles off the overall charge (ai you start with 250 kill the battery the next full charge yields only 230miles total) now here is the question how many miles can you go before you would need to buy anymore batteries??????
23 more posts in this thread. [Missing image file: 1380198685614.jpg]
I'm trying to find online scientific articles for a paper, and almost every search result in google scholar charges you like 36$ to have access to the fucking article. Is there a way to download them for free? thepiratebay isn't really helpful. captcha: for artickee
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How could we test the validity of digital physics? Are quantum computers proof in itself? Pic unrelated
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1 more posts in this thread. [Missing image file: question2.jpg]
instaedu.com Has anyone else been harassing the asian chick tutors on this site? fucking hot
0 more posts in this thread. [Missing image file: image.jpg]
What happened to the offline version? did they get rid of it
5 more posts in this thread. [Missing image file: TheMagicNumber.png]
Can we have a discussion on the number 3? Why is 3 the magic number? Why do groupings of 3 occur so often in nature and man-made creations? Why are 3somes so awesome?
2 more posts in this thread. [Missing image file: how-does-cfd-computational-fluid-dy(...).jpg]
Greetings fellow neckbeards. I am working on a fluid flow project which involves air flowing at ~ 7 m/s through a tube. Obviously this is compressible flow but is it possible to make reasonable estimates of the fluid flow properties by pretending that it is incompressible flow because the fluid speed is so low. basically, can I still use the basic incompressible flow Bernouilli equation on slow moving compressible fluid? I know there are compressible flow versions but I don't have the maths skills to use them.
2 more posts in this thread. [Missing image file: 1376328828413.jpg]
I signed up for a physics course late and I'm having a hard time catching up while I wait for the textbook to come back in stock. I have an assignment due on Friday and without the book it is becoming troublesome. >Glycerol has a viscosity of 12,000cP at 0C and 15cP at 100C. It has a specific gravity of 1.129. Solve for the viscosity of glycerol at temperatures of 10, 20, 30, ... , through 90. >Glycerol has a viscosity of 1,068cP at 20C, and 1,2-propanediol has a viscosity of 42cP at 20C. The specific gravity of each is 1.129 and 1.036 respectively. What is the viscosity of a solution of 80% glycerol and 20% 1,2-propanediol? What of 60/40, 50/50, ... etc other ratios I honestly have no idea what to do here. All of the previous questions were simple, but these are problematic. How would I go about solving these problems?

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