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/sci/ Science & Math

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Most viewed threads in this category

22 more posts in this thread. [Missing image file: 1355961706797.jpg]
Mathematician here, just took modafinil for the first time ever (1 tablet=200mg), well, by "just took" I mean about 35 minutes ago. Pulse right after eating the tablet: 74bpm Current pulse: 72bpm I masturbated just after taking the tablet, and subjectively feel like i got a stronger, longer-lasting burst of euphoria than usual after ejaculation. However, that could be the placebo effect. I am now going to review my math deck in anki (105 cards due), will report back after.
8 more posts in this thread. [Missing image file: Problem.png]
Proof that statistics is bullshit. Why is this shit even classified as mathematics? Its all subjective.
2 more posts in this thread. [Missing image file: 1359747228514.jpg]
How do you quickly write about topics you know nothing about when you constantly have to look at multiple scientific papers, and check to see if the citations say whether its crap or not etc. Is it meant to take tonnes of time?

Fukushima - The Sequel

44 more posts in this thread. [Missing image file: Aerial.jpg]
Power failure hits spent fuel ponds Sooner or later, in any foolproof system, the fools are going to exceed the proofs. www.youtube.com/watch?v=n92YenWfz0Y
151 more posts in this thread. [Missing image file: mqdefault.jpg]
What does /sci/ think of Vsauce?
3 more posts in this thread. [Missing image file: help.jpg]
i need help can some do my homework Suppose the consumption function is C = $500 billion + 0.5Y and the government wants to stimulate the economy. By how much will aggregate demand at current prices shift initially (before multiplier effects) with Instructions: Round your answers to 1 decimal place. a) A $10 billion increase in government purchases? $ billion b) A $10 billion tax cut? $ billion c) A $10 billion increase in income transfers? $ billion What will the cumulative AD shift be for d) The increased G? $ billion e) The tax cut? $ billion f) The increased transfers? $ billion
20 more posts in this thread. [Missing image file: 1332180983229.jpg]
>tfw no qt3.14 gf \pi day general
24 more posts in this thread. [Missing image file: samsung-exynos-5-octa-chip-13633652(...).jpg]
I forgot all the math I learned in highschool. What is the best way t orelearn it in like 3 months time? Willing to study 10 hours a day 7 days a week. Want to take my SAT so I don't need to go to community college

Glow In The Dark

4 more posts in this thread. [Missing image file: Nooka-Mercury-Glow-In-The-Dark-Sung(...).jpg]
This was a question that me and my roommate were wondering about. When you have something that is made to glow in the dark, does it constantly radiate when getting hit by photons, or does it only begin radiating in the absence of light? If anyone knows, it would be great to get an answer. Pic related (ish). If I don't get an answer, I'll just do the research on my own and not be such a lazy ass.
16 more posts in this thread. [Missing image file: E^(-x^2).jpg]
Alright guys time to solve ?exp(?x2)dx from 0 to infinity.
13 more posts in this thread. [Missing image file: launchpad-board11.jpg]
I'm having a hard time grasping the concepts and behaviors of microcontrollers. Anyone know of any sources to teach oneself assembly and microcontrollers? or Someone please explain to me everything that goes on when a simple move instruction is executed (e.g. mov.w #0xABCD, R7). What happens in terms of the Status register, Stack Pointers, Program Counters, RAM etc... I need an in depth example with an explanation of what goes on in the innerworkings of micro controllers. >pic related. My microcontroller
7 more posts in this thread. [Missing image file: Sloth kong.jpg]
http://www.dailymail.co.uk/sciencetech/article-2259706/The-way-trip-Mars-received-1-000-applications.html What do you think of this?
10 more posts in this thread. [Missing image file: image.png]
"The cart is rolls frictionlessly on the table. It has a mass of 1kg. Attacthed to it are 2 strings, that go through two frictionless sheaves. The weights have masses as in the picture. a) How large is the acceleration of the cart? b) How large is the tension in the strings? c) We replace the cart with a box that also has a mass of 1kg, it then accelerates with 1.5m/s^2, find the friction force between the table and the box." I tried doing this one, and got every single answer wrong, even though I thought I knew how to do it. This is how I did it: a) The force pulling the cart to the left is equal to the force pulling the weights down since the cart is attached with a string through a sheave. The force pulling left is equal to: F=1kg?10m/s^2=10N and the force pulling right is F=2kg?m/s^2=20N, therefore the resulting force is 10N to the right. Since the cart has a mass of 1kg it accelerates with 10m/s^2. b) The tension on the left string is 10N (from above) and on the right one is 20N (also from above). c) This one I just have no idea how to do. The answers given in the book are: a) 2.5m/s^2, b) 12.5N and 15N, c) 4N
13 more posts in this thread. [Missing image file: 1340750522882.gif]
I missed the news a few nights ago, what did Curiosity find on Mars? pic might be related
6 more posts in this thread. [Missing image file: Project-Orion-Spacecraft.jpg]
Will we ever use something like Project: Orion or an EmDrive?
8 more posts in this thread. [Missing image file: lol.jpg]
Hey, I have to create an int-array with dynamic length within a class. This is my code so far: #include <iostream> using namespace std; class IntVector { private: unsigned int length; int *vec; public: void create (unsigned int l); void print (void); }; int main () { IntVector member; member.create(2); member.print(); } void IntVector::create (unsigned int l) { length = l; int *vec = new int [l]; for (unsigned int i = 0; i++;) { cin >> vec[i]; } } void IntVector::print (void) { for (unsigned int i = 0; i++;) cout << vec[i] << '\n'; } But when i execute it, nothing at all happens. What's wrong?
1 more posts in this thread. [Missing image file: 1329777821504.png]
>>>/r9k/6155408
6 more posts in this thread. [Missing image file: 2O5St.jpg]
Why pay for school, when you can get the best education materials free ? http://oyc.yale.edu/chemistry/chem-125a http://www.youtube.com/playlist?list=PL3F629F73640F831D&feature=plcp
2 more posts in this thread. [Missing image file: 644282_10151451549765219_39228751_n.jpg]
Anyone here knows how to answer these? y^{u}-2(y')+2y=e^{2x}(cos x-3sin x) y??+y=cos2x
20 more posts in this thread. [Missing image file: 556269_368479123217534_208049381_n.jpg]
What is 3d printing?






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