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# /sci/ Science & Math

## Most viewed threads in this category

Questions for the (bio)medfags. I recently quit drinking but I'm having a very, very hard time focussing on anything basically. Also, I've become extremily bored and unmotivated. Everything seems dull. Is this temporarily or is this just the default me?
What's the most ridiculous question you've ever been asked on an exam? Stupid premise, convoluted answer, whatever.
If a taxicab driver can pick up and drop off customers in several cities and at any time of the day, how would he go about finding a "system" to see what areas generated the most money and when? Could there even be a way for him to "predict" when and where the best place in his area to be is, and at what time?
What's the difference between momentum and inertia?
>you are required to produce a lol
Hey /sci/ I have to solve this: sqrt(225+b^2)=b/q Can anyone tell me what is b?????? Thanks a lot!
Help with problems which are certainly not homework thread. Post problems that you need help with here.
1+1=6 2+2=?
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?
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.
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.
Why is the universe so god damn beautiful?
What would happen if a human swam over this hole? considering the hole is 3mm and a person is big
Hey guys. What exactly are Chem trains? Can you redpill me on it?
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

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.
Help /sci/ I don't understand Euler's function. pic related, Euler's Function
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
we know that is impossible but, seek two positive real numbers such that the resulting division of pi

### Is Race a Social Construct?

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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