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/sci/ Science & Math

Threads added between 2013/07/24 and 2013/07/31

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Most viewed threads in this category

Killing ants with Popcorn

16 more posts in this thread. [Missing image file: ants.png]
http://www.youtube.com/watch?v=CL78eVVW9_M&t=65 Basically this guy says that you can kill ants by shredding popcorn Kernels. Is this true? I want to know before I shit-up my house with an even worse infestation than I already have.
25 more posts in this thread. [Missing image file: krang.jpg]
I'm going to be taking an introductory algebra course next month. I really don't know that much about it, so I was wondering if someone could explain the basics and let me know what I should expect.
4 more posts in this thread. [Missing image file: tv.png]
So I'm having my air conditioner repaired. The repair guy says that the blower motor is DC for extra efficiency. He says there is a "converter" in there (a rectifier I suppose) that converts my household AC current to DC before powering the motor. So is that right? Are DC motors so much more efficient that this makes sense to do? Is this sort of set-up common? What are the drawbacks? Pic not related.
4 more posts in this thread. [Missing image file: le mick face.jpg]
This guy has 600 citations for a paper he wrote...alone. This is pretty top tier, right ?
2 more posts in this thread. [Missing image file: willy wonka meme.jpg]
Hi /sci/, I'm looking for online lectures on quantum field theory and string theory. My math background is very good. I passed calculus and discrete math both with an A. Feel free to hit me with rigorous math instead of pop sci.

Who needs math, anyway?

3 more posts in this thread. [Missing image file: housegone.jpg]
"The city of Fort Worth, Texas had recently ordered the demolition of a condemned house down the street, 9708 Watercress Drive. The demolition crew then proceeded to tear down Underwood's home at 9716 Watercress." Source: Cracked.com ANSWER THAT, TROLLS!
21 more posts in this thread. [Missing image file: 1374936695898.jpg]
Can one really imagine a 4-dimensional space in his head? Or is everyone thinking about (at best) some 3-dimensional space with motion to model it?
15 more posts in this thread. [Missing image file: 500px-Hank_pym_1.jpg]
this will come off as very dumb I assume, but what science degree/field whatever would be best fit for "creating" superhumans, such as increased longevity, super strength basically superhero type stuff?
21 more posts in this thread. [Missing image file: time.jpg]
To what degree is feasible "time travel"? in relation to the parallel worlds. Considering that if doing a "jump" to another timeline would not be affecting our current timeline. I mean, send your memories of this timeline to another, for example
38 more posts in this thread. [Missing image file: 194075322_1361379543.jpg]
"The metre is the length of the path travelled by light in vacuum during a time interval of 1?299,792,458 of a second." What the fuck? They define the metre using a number based on the metre? Why not define the metre as the length travelled by light in 1/300,000,000th of a second, which is rounder? Is this just a fucked up definition?
5 more posts in this thread. [Missing image file: Bullettime.gif]
So I recently had a discussion about superheroes with a pal and one thing that kept coming up was stuff like "impenetrable supersuits" that can withstand any bullets while being elastic. So I did the math: I assumed the inpenetrable suit combined with human flesh and boine would allow the bullet to penetrate 1 cm deep into the body (which is far) and decelerate completely. The average M16 rifle accelerates a 4gramm 5.56 NATO round to 980 m/s doing rough approximations (this is very rough I know) i figured the bullet would have a kinetic energy of 3.92 J and enact a force of 392 Newtons upon a body. now my research has not turned up anything on the force the standard human rib or spinal-column (which was the center of the discussion) can anyone come up with some data on this?
7 more posts in this thread. [Missing image file: 200px-Stannis.jpg]
Are KhanAcademy's lessons on Linear Algebra comprehensive enough or would I be better off picking up a textbook on the subject? Pic not related.
4 more posts in this thread. [Missing image file: 3246.gif]
How do I reset my circadian rhythm, /sci/? I usually sleep from 6:00 AM to 1:00 PM. I feel extremely lethargic throughout the day, rendering me able to accomplish fuck all... I become extremely attentive during the night though. I'm currently a NEET, but i'm planning on going back to school this fall. I need to do some studying beforehand to bring my math skills ''up to speed'', so I need to fix my sleep schedule to maximize work efficiency.
4 more posts in this thread. [Missing image file: 1374639785239.jpg]
why is the andromada galaxy on course to crash into our galaxy? I thought space was expanding, and all galaxies were moving away? Not a troll, just confused
2 more posts in this thread. [Missing image file: Jeopardy[1].jpg]
http://www.youtube.com/watch?v=BvUZijEuNDQ So /sci/, do you think you'd lose on Jeopardy, or would you be able to win?
24 more posts in this thread. [Missing image file: 1373696320942.jpg]
Why do the angles of a triangle add up to 180 degrees? Any proof for this?
4 more posts in this thread. [Missing image file: SciMethd[1].gif]
Is there EVER any good reason to distrust findings from the scientific method, in ANY context? Particularly in the realm of weightlifting. I have talked to way too many people who don't listen to sports science/physiology because they think that it doesn't apply. I don't fucking understand it. The way I see it, *proper* science is built in such a way that it is impossible to deny any finding, emphasis on "proper". Thoughts?
5 more posts in this thread. [Missing image file: Untitled.jpg]
This guy is a fucking nutcase. https://www.youtube.com/watch?v=uRKZnFAR7yw#t=24m14s >the existence of sqrt(13) is highly suspect >highly suspect >suspect what is this even supposed to mean?
14 more posts in this thread. [Missing image file: edge of the universe.jpg]
Alright /sci/ Hypothetically speaking Fig A is the earth and the radius is the limit of the distance we can observe with even our most powerful telescopes. Now we know the universe is an ever expanding eclipse but no one knows our exact location in it. What if, we were to be, say positioned, how it's shown in figure B. Would it theoretically possible then to see, "beyond", the universe? If so, what do you think is out there?
36 more posts in this thread. [Missing image file: 1366127280181.jpg]
>mfw i realized multiplication is just repeated addition

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