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/sci/ Science & Math

Threads added between 2012/10/31 and 2012/11/07

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Most viewed threads in this category

51 more posts in this thread. [Missing image file: 175px-Mensa_logo.svg.png]
Could somebody who is in mensa or some sort of high IQ society tell me what they get in this and what they're actual IQ is? http://iqtest.dk Are mensa tests easier or harder?
15 more posts in this thread. [Missing image file: 500pxmontyopendoorsvg.png]
Just how bullshit is the Monty Hall problem, /sci/? I mean, if a door with a goat is ALWAYS opened, doesn't that door simply become irrelevant? Do staticians just like to say switching doubles your odds because they like jerking off to stats?
27 more posts in this thread. [Missing image file: 23567000.jpg]
Will Khan Academy/PatrickJMT teach me everything I need to know about all of the math subjects?
9 more posts in this thread. [Missing image file: Math-Fail-Pics-140.jpg]
I would usually never do this but I cannot find an example of this in the book. Parametric Curves The curve in the problem looks similar to a Folium of Descartes Show that the curve C crosses itself at the point (3,0) -3 \leq t \leq 3 x \left(t \right) = t^{2} y \left(t \right) = \frac{1}{3} t^{3} - t The problem is that I have no idea how to prove this.I don't even know where to begin. I made a table of values for t but it isn't telling me much. I attempted solving for t in terms of x but the points aren't coming out to (0,3). Any suggestions or help? In return funny physics/math related pictures.
3 more posts in this thread. [Missing image file: Dodecahedrane-3D-balls.png]
If I had a He@C20H20, would it float up like a helium balloon?
2 more posts in this thread. [Missing image file: 212.jpg]
hey i need help with my chemistry work i need the reaction mechanism for CIS-5-NORBORNENE-ENDO-2,3-DICARBOXYLIC ACID + H2SO4 + H2O. with the product being, 5-oxo-4-oxatricyclo-4-2-1-0-3-7-nonane-9-carboxylic-acid. can you help?
12 more posts in this thread. [Missing image file: patella.jpg]
A person is doing leg lifts with 3.0-kg ankle weights. She is sitting in a chair with her legs bent at a right angle initially. The quadriceps muscles are attached to the patella via a tendon; the patella is connected to the tibia by the patellar tendon, which attaches to bone 10.0 cm below the knee joint. Assume that the tendon pulls at an angle of 20.0° with respect to the lower leg, regardless of the position of the lower leg. The lower leg has a mass of 5.0 kg and its center of gravity is 22 cm below the knee. The ankle weight is 41 cm from the knee. If the person lifts one leg, find the force exerted by the patellar tendon to hold the leg at an angle of (a) 30.0° and (b) 90.0° with respect to the vertical.
7 more posts in this thread. [Missing image file: feelings.jpg]
How would you calculate the last 'n' digits of an integer a^^n? (tetration, super exponentiation) For example, how would you calculate the last two digits of 7^7^7^7? I'm thinking it has something to do with Euler's Theoreom and totient function, but I'm not sure. (not calculating by repetitive multiplication either..)
20 more posts in this thread. [Missing image file: JROppenheimer-LosAlamos.jpg]
I figured this was the right place to ask this. Why is it I am become death instead of I have become death?
0 more posts in this thread. [Missing image file: CharpyTester.gif]
Having a bit of trouble finding information as to why Izod get higher values than Charpy impact tests. So why does this happen?
2 more posts in this thread. [Missing image file: n160fig13.gif]
/sci/ basic physics here, if a light fitting is in equilibrium suspended by cables from a roof do any 2 mirrored positions have the same force acting on it just in a different direction? so if I figure out the horizontal component of a force left of a pivot it's the same force as the horizontal right of the pivot?
15 more posts in this thread. [Missing image file: 2012-11-07 17.53.08.jpg]
Ok, kinda forgot how to do this :/
6 more posts in this thread. [Missing image file: reality_pc_universe_white.jpg]
Is there any serious experiment supporting the Simulated Universe theory? That thing has been eating at me for the past few weeks, that we might be just someone's computer simulation, and them in turn another simulation. http://en.wikipedia.org/wiki/Simulation_hypothesis
8 more posts in this thread. [Missing image file: Mind Games.jpg]
Hi /sci/ I have to do a presentation on next tuesday,and it has to be a genuine original presentation , the first guy did a creepy themed presentation about the apocalypse where he put creepy music , creepy cult clothes and creepy talk in a dark room , it worked. so I was thinking and it came to my mind to make a topic about "mind games" , "illusions" and stuff , and for the presentation to be a series of short videos demonstrating few theories about how our mind perceives the outside world differently depending on factors... for example : The Mcgurk effect : wiki/McGurk_effect any ideas on how to do the presentation or other impressive mind tricks I should bring ?
10 more posts in this thread. [Missing image file: hmm.jpg]
How is poop made?
5 more posts in this thread. [Missing image file: code-breakers-1.jpg]
ok so I am having a programming issue, I need to fill in the question marks but I have no idea what to do with them.
2 more posts in this thread. [Missing image file: 1351816137630.jpg]
Chemfag here, wondering what /sci/ thinks of the idea of taking Complex Analysis with my only math classes on my transcript being Cal I & II. I plan on talking with the professor tomorrow, but I'm curious of other's opinions. When I heard that this class was offered, I jizzed my pants. I've never been excited or passionate about wanting to take a class so badly. I do masturbatory maths in my spare time, and I genuinely enjoy exploring math. Also, can /sci/ tell me anything that google couldn't tell me in regards to what I should expect?
4 more posts in this thread. [Missing image file: 5215720500_9f4b7b30f8.jpg]
should psychiatric treatment be based on science or on compassion? been going to a psychiatrist. Lots of "evidence show that this method helps" > mfw I go to a priest, she basically just shows compassion and I feel a lot better. inb4 "it only makes you feel better in the short term" and "a clinical cold eye is needed to make the patient see what should be changed". Been going to doctors for 4 years. Did everything they said. Didn't help.
14 more posts in this thread. [Missing image file: 1351807473700.jpg]
Hey /sci/, anyone care to help a struggling maths student? I am absolutely shit with proofs. Prove that |a-b| = distance between a and b.
5 more posts in this thread. [Missing image file: Excelthing.jpg]
I don't know if this goes here or with /g/ but I'll try. I'm trying to create a sample table at work. I quickly made one up here to show you the idea. What I want to know is how do I create a formula to automatically generate the number of (apples) remaining. My problem is the position of the item in sheet 1 will not the same as it is in sheet to (e.g Sheet 1 tommytim is A4 where is Sheet 2 it is A2. I initially tried doing =SUM(B2-Sheet2!B2) in the apples remaining column however that only works if the item stays on the same row. How do I create a link between the item and and the number of the item so that as soon as I type it into the second sheet, it recognizes it and calculates the difference between items in and items out.






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