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/sci/ Science & Math

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Most viewed threads in this category

Picmonic USMLE Step 1

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Does anyone have any links/torrents for the USMLE prep cards known as Picmonic? Here is an example of it...
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Write a C program that calculates the squares and cubes of the numbers from 0 to the integer N, which is not greater than 10. Allow the user to input the integer N from the keyboard and use tabs to print the values in a table in the form shown below. Comment your program liberally. My problem is that my professor wants it 0 to N not N to 0 as shown in the picture. Any one know how to flip it???
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I've occasionally used this homemade lube recipe I found for masturbation, and I'd like to know if it would be safe for anal (internal) use. it consists of cornstarch and water.
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thoughts on the Fermi paradox?

What is the world's biggest Schrodinger cat?

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How big is it by a truly quantum measurement? I am thinking of comparing Science magazines "Breakthrough of the Year" (BYOT) with the Zeilinger buckyball. The BYOT is a piezoelectric mechanical oscillator (PO) the size of the cross section of a human hair. It is placed in a superposition of its ground state and its first excited state. The well known buckyball experiment is a two slit experiment using buckyballs. (A third candidate might be a macroscopic Josephson junction oscillator conducting both ways at once.) I have made some basic calculations. For instance, the BYOT contains about 10^14 atoms compared to 60 or 72 atoms in the buckyball. By this measure the BYOT is bigger by a factor of about 10^12. On the other hand, the two slits are separated by 50 to 100 nanometers, or 10^-7 meters. In its first excited state, the top of the BYOT PO moves about 10^-15 meters per cycle, according to my calculations. By this measure the buckyball wins by a factor of about 10^8. Calculating energy of the moving parts, I find a much closer horserace, but the buckyball is about 100 times bigger. However, none of these calculations is at all quantum mechanical (QM). ArXiv lists at least five papers proposing truly quantum mechanical measures of the size of a macroscopic Schrodinger cat. The most recent is Lee and Jeong http://arxiv.org/abs/1101.1209 which references the other four. Can someone competent (or expert) in QM apply one or more of these quantum measures to the BYOT and the buckyball and tell me which is larger?
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A sphere of pudding (chocolate, instant, Jell-O brand) with volume of 1 cubic light-year is created somewhere in the universe. Initially, due to the overwhelming gravity within the pudding, the center of the mass would get so hot and dense that we'd have pudding fusion, and shortly thereafter a pudding sun. But the volume of VY Canis Majoris, the largest known star, is only 0.000000000021 cubic lightyears. That's a lot of leftover pudding. The mass of all that surrounding leftover pudding pulling inward would vastly overcome the outward explosive force of the pudding sun at the center, compressing it until a given mass of the pudding was reduced to less than its Schwarzschild Radius, or the radius below which a mass must be compressed to form a black hole. The estimated mass of the observable universe (according to Wolfram) is 3.4e54 kg. This serving of pudding has a mass of 1.1e51 kg, or about 0.03% of all the matter in existence.

FUTURE & VIRTUAL REALITY, HERE WE COME.

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Oculus rift : The Oculus Rift is an upcoming high field of view , low-latency, consumer-priced virtual reality head-mounted display. http://www.youtube.com/watch?feature=player_embedded&v=LCB19lzAXS8 MYO : The MYO armband lets you use the electrical activity in your muscles to wirelessly control your computer, phone, and other favorite digital technologies. http://www.youtube.com/watch?v=oWu9TFJjHaM&feature=youtu.be Terminator arm : 'Terminator' arm is world's most advanced prosthetic limb http://www.youtube.com/watch?v=_qUPnnROxvY So what's next ? What kind of technologies will the future bring in the next 5 years ? It's still way too early to talk about technological singularity so let's just keep that out of the discussion. But the human-machine integration tech is taking off pretty fast.

Notetaking

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I'm a second year Physics student, and I take a LOT of notes, last year I went through something like 1000 pages of lined paper. So, I ask you fellow /sci/entists, what would be the best tablet for note taking/writing out formulas and drawing diagrams? I would prefer something running win8 since it's what I'm used to but it's not essential. I would ask /g/ but they'll be all >hurr install gentoo >pic unrelated
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I'm postingt this here, because I want to read smart answers. Do you know that the pope has authorized an earlier start of the conclave if all the electors are present? What to do think?
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how does one?? the final answer for y well closer is y+\frac{3}{4}=\pm \sqrt_\frac{-8e^{-x}-8e^{x}+65}{16} i'm pretty bad at algebra lol
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Is the universe random or predetermined?
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17y^2 -62y + 49 = 0 ^2 = to the second power How do I solve for y? Step by step please.
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Hope I don't get banned for this, since this is an honest question. What exactly is that stuff inside the wound?
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Recently I have read "Beyond The Quantum Paradox" by Lazar Mayants. The author claimed that Schrodinger Cat Paradox can be solved by the following way: "Since the reasoning of conventional quantum mechanic employs probability, it must concern an abstract cat, whereas any cat experiment, even an imaginary one, should be related to a concrete cat. But every concrete cat during the experiment has only one of the two possible values, 'alive' and 'dead', of the property 'state of being', whereas an abstract cat does not exist in reality at all. Therefore, the question concerning the 'state of being' of an abstract 'Schrodinger's Cat', as stated above, is senseless." What do you think?
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ITT : Give me a reason why this is not a valid proof of Cauchy's Inequality: |X?Y| ? |X||Y| The proof is in R^n and is direct. First we establish the notion of the dot product geometrically. In order to multiply the vectors X,Y that are linearly independent, we create a projection of X onto Y. This is done by multiplying cos? by the magnitude of |X|, where ? is the angle between the vectors X and Y. This new vector, P with magnitude |X|cos? in in turn multiplied by |Y| to produce X?Y. Hence, X?Y = (cos?|X|)|Y|. But, |X?Y| = ?(X?Y)^2 = X?Y, which implies |X||Y|cos? ? |?||?|. By the unit circle definition, cos? < 1, so the result is obvious. In the case of linear dependence between X and Y, it is true that one has to be the scalar multiple of the other, and therefore the projection is not needed, yielding |X||Y| = |?||?|. QED
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So /sci/ teaching myself Calc III and I'm curious which textbook I ought to purchase. Preferably from Amazon.ca if possible. Any ideas?
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Any suggestions on the best way to create a buffer at any pH?
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Hey /sci/! Do you guys believe in God?
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Sup dudes You guys mind giving me a hint for what kind of math will be needed to solve problem 416 of Project Euler? http://projecteuler.net/problem=416 It's combinatorics right? But can someone please point me in the right direction?
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>Cant even multiply divide add or subtract fractions >Don't know what an exponent is >Last math class was geometry back in 11th grade where i got a D >Go to /sci/ and ask 'How do i math?" >Go to khanacademy faggot >Do it >now I'm blasting through precalculus Just wanted to stop by and say thanks.






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