What happens when we run out of oil?
>>7654191
Trump makes Mexico buy us more.
>>7654191
WW3
Social and economic chaos will ensure
We're too heavily dependent on it that a switch to alternative sources for fuel will take decades to happen
Hi,
I was hoping someone could explain an idea I heard of before but never fully formalized. Basically, it was a philosophy for why the error terms in prime counting functions (in number fields, function fields, and some other places in number theory) "should" have exponent 1/2, (almost) as predicted by the Riemann hypothesis and its variants.
Here's a vague idea of what I have, if it helps prompt someone to properly explain/give a reference. The keyword is the Central Limit Theorem, which states (I believe...) that if [math]X_i[/math] are a collection...
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>>7654155
Let me try CLT again:
[eqn] \frac{X_1 + ... + X_n}{\sqrt{n}} \to N(0,\sigma).[/eqn]
>>7654155
Just for completeness, in case a statistician shows up that is unfamiliar with the number theory: the Mobius function [math]\mu(n)[/math] takes value either [math]-1, 0, 1[/math] depending on the prime factors of n so that it is 0 when n is divisible by a square, -1 when divisible by an odd number of distinct primes, and 1 otherwise. So if there's no bias in number to have even or odd prime number of divisors, the mean of [math]\mu(n) = \lim_{x \to \infty} \frac{1}{x} \sum_{n \le x} \mu(n) [/math] should be 0,...
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>>7654167
One more post, sorry.
It is a theorem (equivalent to the famous Prime Number Theorem!) that
[eqn] M(\mu) = \lim_{x \to \infty} \frac{1}{x} \sum_{n \le x} \mu(n) = 0[/eqn]
and the Riemann hypothesis is that we have the estimate
[eqn] \frac{1}{x} \sum_{n \le x} \mu(n) = O(x^{1/2+\varepsilon}).[/eqn]
That should make more sense.
I have two months until university starts. How do I learn the harder algebra and pre-calculus so that I can test into Calculus?
What books, to be specific? I have a $110 card to Half Price Books and need to spend it anyway as there is no HPB where my university is and it will be worthless once I go.
>harder algebra
>pre-calculus
>>7654104
Just stare at a unit circle for 2 months straight, thats how I did it.
if ur any good the test should be ez
Gallium metal has a melting point of about 30 degrees C.
Galinstan metal has a melting point of about -19 degrees C.
If I melted these two metals and mixed them, would they bond into a metal with the melting point of about 5.5 degrees C?
I mean just by allowing them to melt and mixing them in a container. And not adding any extra heat above 30 degrees.
Bump for answer
>>7653921
It can have different melting points depending on how the crystal structure of the alloy is.
>>7653921
Silly you, Galinstan is an alloy of Gallium and some other stuff.
On a scale from 1 to 10, how much does weed cure cancer?
it doesn't cure cancer you dumbfuck it just alleviates some of the pain caused by cancer symptoms.
>>7653905
Look up some of the literature on the cannabinoid system's relationship with immune system modulation.
Ideas, experiences, questions, knowledge, etc?
Coming from the round earther
Use complete sentences and maybe I'll give you an actual reply.
>>7653890
https://en.wikipedia.org/wiki/Collective_unconscious
Hey /sci
I fucked up
I'm pretty good at learning things
I am number one in my Math and Physics class almost number one in History
I just started to get my shit together
Got caught up and ahead in my classes reading the textbook's in about 3 weeks
But I ran into a problem In engineering class. I haven't paid attention until now and there is no textbook for this shit
I'm looking for any anons who know anything about breadboards, "and gates", "Or gates", "Inverter gates", Multisim, "oscillator".....(Multisim...
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>I'm pretty good at learning things
stopped reading there
>>7653886
Grades don't matter. Sorry to burst your bubble. What matters is that you learn problem solving skills. Trying to figure it out yourself, even without information is a noble pursuit. When you get into the real world and are asked to create something completely new and novel, you can't just ask someone how to do it. You have to think for yourself.
Also, that's a shitty class if it doesn't have readings or notes. Maybe check the class facebook page. In all my classes we had a shared...
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You clearly aren't good at learning things if you can't even figure out a fucking And gate.
I'm a bit confused as to what the three body problem is. Why is it impossible to predict the motions of three bodies in orbit around eachother?
mathematicians are too dumb
There are ten constants of motion:
Three position co-ordinates for the centre of mass of the system
Three velocity co-ordinates for the centre of mass of the system
Three vector components for the angular momentum of the system
Total energy of the system
There are 18 unknowns in the system
Three position co-ordinates for each body (nine in total)
Three velocity co-ordinates for each body (nine in total)
Try to solve a linear system of 10 equations and 18 unknowns. Can't be done.
>>7653929
>Try to solve a linear system of 10 equations and 18 unknowns. Can't be done.
Oh so that's why the double slit experiment gives unpredictable results!
What do people with high IQs do all day?
Browse 4chan instead of getting shit done. My IQ is 134 with a standard deviation of 15.
>>7653822
Think about how superior they are.
Depends on the person. Remember that IQ, while it makes an okay estimate of mental skills, gauges pattern recognition junk better than anything else. So the question you should probably ask is what people exceptionally talented in their field do all day. There the answer is obvious. They got so damn good by doing work in their field all the time.
https://www.youtube.com/watch?v=P9M__yYbsZ4
Is thorium a meme? Are thorium reactors they as miraculous as this video and everyone seems to be telling me? If so, why are we not using them?
>Is thorium a meme?
Yes.
>Are thorium reactors they as miraculous as this video and everyone seems to be telling me?
Of course not.
>If so...?
They're not.
Can we please just leave it at that?
>>7653718
They are good.
If you can get one running that is.
The biggest offset is the creation of a liquid salt holding facility and mining.
Picture this: You have to start mining for a material that has never really been sourced before AND you must start the first ever factory with equipment JUST for the processing of thorium.
>>7653734
But if this was subsidized as most nuclear energy projects are, that would just be an opening investment wouldn't it? If they truly work, it should pay off.
>>7653729
>Can we please just leave it at that?
If you want, but I'd like to know what the big obstacle is, if only for ammunition against these people.
Hello everyone, I'm a fresh new student in Physics and, here in my country, we do not learn calculus till you enter college. I was wondering here and i did not find a properly answer on google. Which calculator should I get? A HP with those graphic functions? I'm currently a student of biochemistry and I use a Casio FX82MS but I guess it will not help me through the whole course.
Any advices?
Thank you in advance and I'm sorry for my lack of skills in english.
TI-89 will do you for anything in college and grad school.
HP and Casio are for poor plebs.
God you live in a pleb country
Get a ti-89. Combines the simplicity of the 84 with the bonus of the CAS
Why is my consciousness me and not someone else? Does the matter that makes up my brain have written my name on it?
The matter which makes up your brain is physically disconnected from all the other brains. That is what makes your consciousness be associated with your flesh in particular. As a kid I was a bit weirded out by this, but once you weed out the dualism it's not complicated.
>>7653698
But why am I me?
>>7653689
What if consciousness is unrelated to your brain?
What is his greatest achievement?
Does he even have a single one?
he didn't shitpost on/ sci/
>>7653665
Bumping this because I'm curious and I want in on the meme. I saw "Von Neumann universes" and my nose started bleeding a bit. Conceptually that wasn't even a a very difficult idea (very very large finite numbers related to cardinality or similar), I just wasn't familiar with the jargon/motivation.
He helped win the war by making the atomic bomb
Hey /sci what music do you like to hear when you study?
https://www.youtube.com/watch?v=9uIEIelz_SM
>>7653664
That episode creeped me out when I was younger
>>7653814
you are not alone
brutal atmospheric slamming blackened death jazz with some post-baroque influences
Who's your favorite contemporary mathematician? Based on whatever; personality, accomplishments, etc. By contemporary I'm looking at mid 20th century onwards.
>>7653612
John Conway reminds me of Jared Harris as Professor Moriarty.
>>7653612
Edward Witten
Newton da Costa.