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/sci/ Science & Math

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Most viewed threads in this category

23 more posts in this thread. [Missing image file: bellcurve.gif]
I'm a physics major with an IQ of 110. My peers are noticeably faster than me at solving math and physics problems. I hear the average IQ in physics is 140 (and this is just in average run of the mill state schools, it's higher in the ivies), which is several standard deviations above the norm while I am barely above average. I don't feel smart enough to be in this field.

population question

9 more posts in this thread. [Missing image file: imgres.jpg]
Hey guys need help with this, In 1960 the tropical island nation of Fraserland had a population of 3 million people. In 1985 the population was 6 million, and in 2010 the population was 12 million people. Between 1960 and 2010 the birth rate has been constant at 35 births per 1,000 people per year. The death rate has also been constant. What is the death rate?
6 more posts in this thread. [Missing image file: exercise 6.13.png]
any logic people on here? I'm having a problem in my Language proof and Logic problems, chapter 6, using fitch. I need to prove Dodec(e) Large(e) ~Dodec(e)orDodec(f)orSmall(e) ____ Dodec(f) The pic is the proof that I made. It works all the way until the end, when I try to use Disjunction elimination to prove Dodec(f) by citing the Disjunction and the two sub proofs, but it tells me its not a proper application of the rule. Can any one see the problem that I made, and explain it to me? I've been having a lot of problems with disjunction Elim
2 more posts in this thread. [Missing image file: wallet.jpg]
1 more posts in this thread. [Missing image file: 1309233302212.jpg]
http://noosphere.princeton.edu/ http://arxiv.org/abs/quant-ph/9505023 http://arxiv.org/abs/1102.5339 What do you think of the global consciousness project, many-minds cuantum mechanics, and the scientific fact that we live in a simulated reality connected with a morphogenetic field?

STREET SMART VS BOOK SMART

2 more posts in this thread. [Missing image file: 1381349324187.jpg]
Is one better than the other?
47 more posts in this thread. [Missing image file: no homework.png]
Help with problems which are certainly not homework thread. Post problems that you need help with here.
25 more posts in this thread. [Missing image file: AmericaFuckYeah-fuck-yeah-post.jpg]
1+1=6 2+2=?
27 more posts in this thread. [Missing image file: cardinal.jpg]
Can someone explain frequentist statistics to me? It seems like this framework is widely used throughout science to design and conduct experiments / test hypotheses, but I don't really have good grasp of the concepts. In particular, what does "statistical significance" mean in the frequentist viewpoint?
1 more posts in this thread. [Missing image file: dat blur.jpg]
I just picked up a TI-82 STATS from a charity shop for $4.99. You can get Wolfenstein on here, right? If so tell an anon how? Time to relive my childhood.
3 more posts in this thread. [Missing image file: 4chan.jpg]
I have just been reading into special relativity. And I was just wondering, if you have an object travelling close to the speed of light and then you have a sound wave emitted from one end of the object would the wave behave differently due to the objects contraction or would the wave propagate through it as if it was at rest? This might be a stupid question, but hey why not.
3 more posts in this thread. [Missing image file: carina-nebula-dust-pillar.jpg]
Why is the universe so god damn beautiful?
4 more posts in this thread. [Missing image file: didhedied.gif]
What would happen if a human swam over this hole? considering the hole is 3mm and a person is big
7 more posts in this thread. [Missing image file: 1.jpg]
Hey guys. What exactly are Chem trains? Can you redpill me on it?
15 more posts in this thread. [Missing image file: Untitled.jpg]
Is the mains electricity valued as the effective value or the maximum value? Where I live it is 220v. If it's the effective one, then the maximum would be 308v, if it is the maximum, the effective would be 157v. Which one is it?

Trig double angle equation help

9 more posts in this thread. [Missing image file: Inline11.gif]
Hey /sci/, I'm studying for a math test and am seriously stumped at one problem. Find the (real) values for A, B and C for all values of x: (5cosx-9sinx)^2=Acos2x+Bsin2x+C I know to start by expanding (5cos(x)-9sin(x))^2 into 81sin^2(x)-90cos(x)sin(x)+25cos^2(x), and use the double angle formulas from there. I can get the value for B easily, 45*2cosxsinx=45sin2x, and since it's negative B must equal -45. But I keep ending up wrong with A and/or C. I know which formulas to use, but I don't seem to get how to use multiple formulas simultaneously. Please help me, /sci/, I've been stuck on this part for over a week now.
0 more posts in this thread. [Missing image file: Euler's Function.jpg]
Help /sci/ I don't understand Euler's function. pic related, Euler's Function
3 more posts in this thread. [Missing image file: 1381803361131.png]
This is probably such a trivial question, but how does resistance work? >4.2v output from a battery + a strip of wire reading 0.6ohms Is it a direct subtraction, ie. 4.2v - 0.6ohms = 3.6v? I'm fiddling with my multimeter and testing various stuff: >battery is 4.2v >internal resistance of flashlight is <0.01ohm >bulb filament is 0.6ohm >reading the voltage at the bulb yields 3.0v If it is a direct subtraction, why am I losing an addition 0.6ohm? >expensive flashlight, don't want to replace it >problem was only recent as I noticed dimmer output
12 more posts in this thread. [Missing image file: Pi.jpg.png]
we know that is impossible but, seek two positive real numbers such that the resulting division of pi

Is Race a Social Construct?

3 more posts in this thread. [Missing image file: money cat.jpg]
So recently I've been reading about race and whether it is a social construct or not. I don't understand how people can say that there is no link between intelligence, talent, athletes and race when most of the scientists are Caucasian and according to IQ scores Jews score the highest and Asians score the second highest. Thoughts?






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