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Prove that the earth is not flat.

I don't understand where I went wrong with these, but I'm not getting the correct answer. "A typical 100 W lightbulb produces 4.0 W of visible light. (The other 96 W are dissipated as heat and infrared radiation.) What is the light intensity on a wall 1.3m away from the lightbulb?" The answer I got was 4.71 w/m^2 by the equation: 100/(4*pi*(1.3^2)) "A krypton laser produces a cylindrical red laser beam 2.0 mm in diameter with 2.0 W of power. What is the light intensity on a wall 1.3m away from the laser?" The answer I got was roughly 40000 w/m^2 by the equation: 2/(4*pi*(0.002^2))

So are there any interesting corollaries to Fermat's Last Theorem or is it just for fun? Also, does anyone know if it's equivalent to modularity in some strange way?

hey /sci/ anyone have any exam horror stories or stories about classes that where just insanely hard!

How do I warp the fabric of space-time?

Does anything go here?

Welcome to the putnam thread. ITT we post problems and attempt to solve them.

>"Grothendiek was tired of math >He was doing 12hours of math a day, 7 days a week, for 20 years" If anyone did this much math, they would basically be genius-tier, no? I think people are impressed by mathematical ability without realizing it just takes a lot of hardwork. If a regular kid played the violin or chess for 12hours a day, for 20 years, he'd be among the best in the world...no surprise there.

Is Informatics a viable career option? What are the job prospects and salary like? Would I have to do graduate studies to actually do anything with it?

What's the most respectable but least mathematical science? I enjoy math, but anything above calculus and linear algebra is just mental masturbation and a distraction from real science.

if not /a/ then /sci/

>tfw slacked off in highschool >tfw not smart enough to go to MIT >tfw you will never be able to go to space

Is materialism is a scientific view of the world or actually just bad philosophy? What is matter? >I think that modern physics has definitely decided in favor of Plato. In fact the smallest units of matter are not physical objects in the ordinary sense; they are forms, ideas which can be expressed unambiguously only in mathematical language. -- Werner Heisenberg

I have a min, a max and a mode.. Is there any way to get out the average? Min: 22,5 Max: 40,5 Mode: 36 There are 17 numbers in the set.

Need some statistics help! I'm pretty solid on most concepts, but finding Z-scores and whatnot on a standard normal using the tables/calc is killing me, please help if you can. Essentially, the problems I'm having the most difficulty with follow the form: "Find z so P(z < Z < 1.50) = .8220" Where do I even start with this mess?

What's your favorite MST-Algorithm, and why is it Kruskal's?

Currently writing a novel and would appreciate some help. What would happen if someone left a human body in a barrel of hydrochloric acid too long? Would the body dissolve? I've been looking on Google but people say that hydrochloric acid doesn't melt human skin it just burns and/or corrodes it. I'm really writing a novel...I promise I'm not trying to kill anyone.

Why do arts and humanities people think they're much more intelligent than everyone else when STEM people don't? By this I mean that arts people will often tell you how much smarter they are, but a STEM person will not.

Is it just me or who feels so shit about Wikipedia? There is a hell lot of loaded tone and obfuscation here and there, depends on the nature of the article. Reading Wikipedia is like stabbing my own eyes. >inb4 Wikipedia is not /sci/ yea right, don't use it.

I want to get into Graph Theory, maybe Combinatorics aswell. Know any good introductions?