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/sci/ - Science & Math

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8944342 No.8944342 [Reply] [Original] [archived.moe]

"intelligence" is a sociological concept. it has no basis in science.

1 replies omitted. Click Reply to view.
>> No.8944358

Concept is a basis . It had no science in " intelligence ". Sociological.

>> No.8944362


>> No.8944371
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Our Intelligence may perhaps be our ability to percieve the near future. Nothing more. And that is pretty stupid..

>> No.8944386


>percieve the future


Intelligence is the ability to understand cause-and-effect relations, and apply them to theoretical/abstract concepts (create models).

Through observation it's clear that some people have an easier time doing that - we say that these people are more intelligent.

>> No.8944399

Yeah, understanding. But all the choices we make will have an effect on the future. Our ability to understand our universe will allow us to better percieve the future. Our ability to think through decisions, and how choices will take us down certain paths is how we can better percieve our future. The fact we can plan months, or even years in advance for certain events is extraordinary, and is a token to our intelligence. The better you understand and the more logical you are, the better you can percieve your future. Just look at any stupid person. Now, tell me, if you think they had the forsight to see themselves being mentally insane or homeless? I'd assume not..

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8944277 No.8944277 [Reply] [Original] [archived.moe]

What concepts should I (brainlet) brush up on before I start calc 2? I'm really rusty on my trig and have a few weeks to prepare. Just finished calc 1 after a few years break from math and from just looking ahead in the book I feel like I'm totally fucked. Any advice /sci/?

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8944276 No.8944276 [Reply] [Original] [archived.moe]

What are all risks?
Any benefits to the baby?
Should I be calling cps asap?

>> No.8944290


>> No.8944330

~500ml a day of 8.4 with formula help?

>> No.8944431

No water is safe for your baby. Just give him Coca-cola.

>> No.8944457

The brown coloring makes their poop stinkier, you should give them mountain dew for a fresher greener diaper.

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8944195 No.8944195 [Reply] [Original] [archived.moe]

Does anyone know of a good website with college level free physics problems? I'm just bored, I miss math lol, and all I can find online thus far is like high school level (mostly algebra based) math sheets.

>> No.8944202


>> No.8944209

THANK YOU!!! ^.^

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8944176 No.8944176 [Reply] [Original] [archived.moe]

>Calc I
>Calc II
>Calc III
>Linear Algebra
>Ordinary Diffeqs
>Gen Bio
>Gen Chem
>Organic Chemistry
>Physics I
>Physics II

Reminder that if you actually show up for any of these classes except on exam days you are a brainlet.

59 replies omitted. Click Reply to view.
>> No.8944381

>actual bait hasn't been swept after more than 10 minutes

No wonder they took janitor applications.

>> No.8944385

spot the new posters

>> No.8944406

>it's just le ebin funny maymay site cuck newfags kek xD
Summer child, go play outside.

>> No.8944434

Lol this thread is great

>> No.8944491

>The state pays for my education with its own hard-earned money, I don't want to waste it by not going to class!

I said to myself mockingly as I trudged to class anyway.

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8944171 No.8944171 [Reply] [Original] [archived.moe]

I'm trying to just jump headfirst into learning Chaos Theory by myself, so /sci/ where do I start and should I learn anything prior?

9 replies omitted. Click Reply to view.
>> No.8944263

go read "chaos" by james gleick.
It's a fun, easy read.
It's a novel, and is about the history and fundamentals of chaos theory, and has no prerequisites.
It won't teach you anything about actually using "chaos theory" but it's a decent place to start I guess. At the very least it's interesting. Sounds like you aren't ready for any formal study of it anyway, I dunno.

Go buy some funky pendulums (you know the ones with arms of different lengths, balls of different weights, etc) and play with them? lol

>> No.8944268

Probably just picking up a basic stochastic processes text would be a good starting point. Having a decent knowledge of probability theory prior to studying stochastic processes would also be helpful.

It's been a while since I've read it, but I think Resnick's Adventures in Stochastic Processes book did a good job at building up stochastic processes from probability theory and without relying too much on analysis.

>> No.8944605


It's just a concept. The picture you attached is a Lorentz attractor which is something they use in 1st year engineering mathematics to show you how much an output can change given seemingly-minute changes to an input.

If you really like the idea of chaos theory, you have two options:
1. Study fluid dynamics and become a moderately ok engineer in the process if you don't give up when you realise how dull it all is
2. Become a philosopher, advance or re-invent the concept and either starve to death or become a professor

>> No.8944621

Get the book by Gleick, and maybe the one from Lorentz (the butterfly guy)

You need to be able to deal with ODEs/PDEs, and if you want to go deeper; figure out the shit on Hausdorrf dimension etc. etc. (Real Analysis comes in handy for the Theoretical approach, but I started on Gleick, made a program to model it in python, and went from there.)

have fun. (Modern terminology: Dynamic equations)

>> No.8944724

My dad got a Masters from MIT while Lorentz was there. He said that Lorentz was a farty old man

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8944165 No.8944165 [Reply] [Original] [archived.moe]

Did the infinite complexity of the universe arise from absolute simplicity? Did this really all come from nothing?

4 replies omitted. Click Reply to view.
>> No.8944696

>divine thought
bullshit detected

>> No.8944709

I personally think you just need three things: A thing, another thing and a reason to change the state of these things. Complexity can then be achieved by a combination of these two things, and the products of these things.

>> No.8944711

>nothing is impossible

This statement is actually meaningful in this context

>> No.8944720

There is no complexity. Everything is the same. It's just a delusion.

>> No.8944728

Symmetry has a habit of breaking. Nothingness is as perfectly symmetrical as you can get, and it duly broke. Put another way, all physical laws are corollaries of Murphy's Law.

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8944150 No.8944150 [Reply] [Original] [archived.moe]

Statisticians just killed their job outlook with Watson. Literally companies can connect to Watson and have Watson do their biddings. No more humans needed.

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8944140 No.8944140 [Reply] [Original] [archived.moe]

>it's a sum-to-product formula integral
>it's a hyperbolic trig sub

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8944131 No.8944131 [DELETED]  [Reply] [Original] [archived.moe]

Note: if you do not have a poop book and sit on 4chan instead you are wasting precious time.

>> No.8944133

>am shitting and reading 4chan right now and you can't stop me

>> No.8944138

I finished Atlas Shrugged whilst on a 5 day explosive diahrea bender

>> No.8944145

>taking more than 30 seconds to drop a deuce
have you heard of "fiber"

>> No.8944162

>Not sitting on the toilet a few min before wiping

Must suck having roommates.

>> No.8944546

right now it's When H.A.R.L.I.E. Was One v2.0

a few years ago it was a bunch of crossword puzzles (I can usually do NYT Thursday now) but then I was sitting longer enough that I got hemorrhoids

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8944109 No.8944109 [Reply] [Original] [archived.moe]

I don't want kids, but I do want my legacy to live on. On my death bed, I'd like to launch hundreds if not thousands of vials of my semen into space, in the hopes that they seed life on the habitable planets I direct them towards (assuming affordable and reliable launch technologies have been produced by then).

Would it be at all feasible for life to evolve from my frozen sperm, assuming it landed on a habitable planet?

I like the idea that in four billion years there could be an intelligent civilisation built from my semen.

5 replies omitted. Click Reply to view.
>> No.8944186


>> No.8944251

>tfw all life on Earth is the result of some virgin loser alien jizzing and launching it into space

>> No.8944279

Semen, when frozen at a rate which does not immediately kill the sperm cells, usually still remains valid for ~20 years.
OP, I'm not against your proposal, I mean you'll never find a human woman so your best chance is with the void of space, but be reasonable:

How are you going to get your dickwhiz to a habitable planet within 20 years?

>> No.8944283

im going to send my cum into space as well and we'll see whose jizzians develop FTL travel first
i'm bettin on my lil guys

>> No.8944402

I'm reminded of Niven's woman of kleenex story.

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8944061 No.8944061 [Reply] [Original] [archived.moe]

Today I learned what double integrals are and even though in class we only saw really trivial examples (planes) and basically just covered the limit definition, when I got home I got myself some practice problems and learned all the little tricks like changing the order of variable and subdividing the region being integrated over.

And I have to say, doing double integrals makes me feel really good about myself. It makes me feel really smart. I am not sure why it is, but if it is anything then it probably is drawing the double integral symbol, writing dA, and specifying the region of integration under the integral as a set, rather than as an interval. Also when I say the word compact I feel like a big man.

Compact. Compact. Consider this compact set. Consider this family of compact subsets. Consider consider consider. Let A be a partition. I want to fuck a double integral.

And just now I was doing retarded shit as always like jerking off and watching dumb 4chan simulator videos on youtube when suddenly I remembered how good it felt to do double integrals, so I looked for more problems and just did them. It legitimately felt good to do those integrals and now the feeling has stuck in me. I may just see myself in the couple of weeks doing double integrals at the park, at the bus, in my room, in the bathroom while taking a shit. Who knows. Double integrals may be the best concept in mathematics that has ever been invented and no one can deny this to me. And I have felt so good that I have come here to you to preach about the one true god of mathematics: double integrals. Have you done a double integral today? Have you thanked the gentle authors who created double integral problems for us to solve? Thank them or you will go to integral hell, where there are only single integral problems and where compact sets do not exist.

So comfy.

5 replies omitted. Click Reply to view.
>> No.8944106

There is nothing wrong with fucking who you love

>> No.8944116

Report back when you learn the joy of grad, divergence and curl.

>> No.8944127

Meaningless concepts. I shall get a PhD in Double Integrals

>> No.8944168

>not getting two PhDs in single integrals
brainlets when will they learn

>> No.8944324

Couple weeks into calculus 3 now, doing well, already past partial derivatives and beyond. Chain rule was a joke. Double integrals remain my specialty.

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8944048 No.8944048 [Reply] [Original] [archived.moe]

Redpill me on condensed matter physics /sci/

To anyone who works in this field: do you enjoy it? How much coding / simulation do you do?

Also, how much strict QM do you use as opposed to EM and stat mech?

>> No.8944063

Oh yeah, forgot to mention

How is employment outside of academia in this field? Would an industrial position still constitute research into fundamental physics or am I looking at engineering / finance here

>> No.8944197

Condensed matter is a broad field now. Most people at the MSc/PhD/PostDoc level are entirely theory, or entirely experiment, and seldom both save for a bit of modelling by experimentalists. I'm sure you can figure out who does the coding, and how much of it. (Hint: Theorists do a fuck ton, experimentalist only code for analysis and maybe instrumental control). There's no "strict" QM. EM is built into QM, e.g. 2D materials whose electrons move in a strongly correlated manner. Everything you do will be QM+EM, seldom stat mech (at least in my experience). Don't know about jobs, still a grad student, but I seen dudes go to IBM/Some national lab/Polymer companies/Biotech shit on top of finance shit. To be honest the skillset you get doing a grad degree in condensed matter is pretty much entirely on you. It's not like organic chemistry, where you just are expected to synthesize something novel and characterize it. Depending on the project(s) you do, you will acquire a very different skill set. Now kill yourself.

>> No.8944204


>> No.8944259

just to clarify this poster was not OP (I am) and needs to kill himself

Thanks for the reply good to know

>> No.8944383

>Redpill me on condensed matter physics /sci/
I did a PhD in solid state physics, a sub set of condensed matter. Solid state is where you can have a chance for a good job in industry, like in the semiconductor industry.

>entirely theory, or entirely experiment, and seldom both save for a bit of modelling by experimentalists
True. Though I noticed more Chinese scientists were into both theory and experimental work.

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8944026 No.8944026 [Reply] [Original] [archived.moe]

I'm trying to understand it (non-science background here), because I read in a book it led to much chemistry discoveries. Wikipedia doesn't do an eloquent job, imo. Is it that light can have either positive or negative static or zero static electric properties?

38 replies omitted. Click Reply to view.
>> No.8944123

op here, if u don't gimme an answer to the 8 possibilities, i'm putting on my tinder:
>you can find me on /sci, not getting the answers I want

>> No.8944125


>> No.8944130

where the flying fuck in the flying fucking world is flying fucking lisa randall
inb4 permaband

>> No.8944141

and a better question is who killed the fucking war star?

>> No.8944175
File: 29 KB, 342x242, crosspolarization.jpg [View same] [iqdb] [saucenao] [google] [report]

I don't know why no one has posted an image like this, but it's much easier to understand with a visual aid. Unpolarized light has an infinite number of waves overlapped (called a "superposition") in an infinite number of orientations. A polarizer filters out all the waves except for those of a specific orientation. The resultant light has electrical and magnetic poles, kinda sorta like a magnet.

This is a layperson explanation and not 100% accurate, but it should get you started. Here's a video on the Faraday effect, which shows how the polarized light can then be manipulated by a magnetic field.

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8943992 No.8943992 [Reply] [Original] [archived.moe]

if venus still had an internally generated magnetic field and it was as strong as earth's, would the planet resemble earth today?

2 replies omitted. Click Reply to view.
>> No.8944247

No, it is too close to the Sun, with or without a magnetic field it would eventually have heated up enough that any liquid water would be vaporized and a runaway greenhouse effect would start up. Magnetic fields are only good for slowing down atmospheric erosion.

>> No.8944262

I think you're wrong.
If earth was moved into venus orbit global temp would rise only by about 30F, which is catastrophic yes, but it wouldn't evaporate the oceans.

nothing you said is correct.
titan is the only other object in this system that has stable bodies of surface liquid

>> No.8944278

>if there was some pseudoscience forcefield around a planet made of sulfuric acid with intense volcanic activity would humans be able to live there?
t. brainlet

>> No.8944527

The real problem wasn't the lack of a magnetic field but the lack of tectonic activity, which is crucial on Earth to avoid building up CO2 in the atmosphere.
You also have to consider that initially the sun was colder than what it is today, according to some models (yet unverified) it's possible that venus remained habitable for as much as 2 billion years before giving up to the runaway greenhouse effect.

>> No.8944534

>Different material composition.
>Too close to the sun (at least closer than Earth is).

I imagine it could look somewhat like Mars without the ice caps with pools of green and yellow acids that streak across the surface following valleys made by the winds and with a beautiful atmosphere.
I almost want to see what the Venus I just described would look like. Probs hella far off, but I think I'm in love with the imaginary concept.

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8943971 No.8943971 [Reply] [Original] [archived.moe]

lim n->inf, 1/n=0

n/n = (1/n)*n = 0*n = 0


lim n->inf, 1/n is not 0

disgusting mathmaticians

i found why your so idiot and disgust

10 replies omitted. Click Reply to view.
>> No.8944200

Yes. But having a limit defined as 0, doesn't make the whole term equal 0. That's not even a troll, that's just cringe.

Seriously, stop being a cringy faggot and do something productive with your time, like studying mathematics.

>> No.8944224

why is it cringe???

>> No.8944243

this same exact thread/pic was posted like 5 days ago, and of course, got the same responses

considering that nobody would ask this twice, considering how it went last time...

why the troll? why? why? why? there are way better ways to troll. but clearly you are a troll. why? why are you so bad? why?

>> No.8944249

The limit of n/n can be written as the
lim n * lim 1/n as n -> infinity.

Lim n diverges. A divergent sequence multiplied by a convergent sequence is divergent.

There is no problem here.

>> No.8944255


counter example:
(1/n) * (1/n^2) is a convergent sequence

therefore, your theorem "A divergent sequence multiplied by a convergent sequence is divergent." is not true

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8943964 No.8943964 [Reply] [Original] [archived.moe]

I am trying to design a habitat for fish in microgravity and want to know whether my design is feasible.
Currently, fish are just being held in stationary tanks and have no resistance so their bones become less dense and if they were brought back to earth would likely die.
I made what is essentially a centrifuge for them which I think would create artificial gravity if spun if I am not mistaken.

>in b4 engineering is a meme

5 replies omitted. Click Reply to view.
>> No.8944494

Then why the fuck does it matter if they'd die when they are reintroduced to earth? You simply keep sperm/eggs from them and recreate the population at the planet you land on.
>Inb4 your wrong ECT
I'm not, get over it

>> No.8944501

This is actually fucking brilliant and solves a lot of problems brought up when people talk about colonizing other worlds.
>Not trying to suck your dick, but seriously just wow.

>> No.8944597

It's trivial, just like most "problems" facing scientists today, which is why I find mainstream science to be boring.

>> No.8944644

>It's trivial, just like most "problems" facing scientists today, which is why I find mainstream science to be boring.
Have you considered that you might just be really ignorant about science?

>> No.8944722

I certainly could be. I know the majority of the major problems facing the scientific community in several different fields, and I know that they could all be solved in a decade with competent people working on them. I would, but there's simply no money in it, and as anyone with half a brain stem knows the world revolves around money.

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8943957 No.8943957 [Reply] [Original] [archived.moe]

Why do you study math? Whats the allure to numbers and formulas?

10 replies omitted. Click Reply to view.
>> No.8944438

Because math trains syllogism. Because math and science work.

>> No.8944611

>Maths + LSD = ...(equations)...
> Understand everything, forget everything, relearn it, realize time is an illusion.
> Spend an eternity in this state.
> Check trip-notes and realize you've been there for 10 minutes.
> Everything can be described mathematically, because the language of mathematics is founded on our own logic => anything that makes sense makes sense mathematically.
> People who can't maths become strange creatures you can't trust, except you can.
> ???
> Poetry of Mathematics speaks to the soul.
> Go Crazy
> Read up on mysticism. Try it.
> realize that any given system of symbols can take the place like mathematics, yet none are as firmly rooted in the very logic you use to analyze them.
> Everything dissolves into delta-functions and closed surfaces, but it never loses the feel of being a model of reality.
> Look to the brain, and the brain becomes a series of filters for reality. Insofar there is a reality, it is a construct of mathematically comprehensible filters.
> Reality makes sense, but is now not attached to ego.
> Ego-coupling to reality, or realities of others is no longer a compelling concept.
> Ego death, enlightenment.
> Check time again; 20 more minutes.
> The universe of motion can be modeled through scanning for stationary and moving signals, dipoles,monopoles, quadrapoles...
> Life is both a series of deterministic chaos, yet probability gives us the best models.
> Quantum Theory makes sense in that it was created to make sense. Still it is modeling reality, and as to the "Real" world, we cannot make any definite statements.
> If this is a simulation, or not, is not important.
> The sheer amount of computational capacity to model an accurate reality as perceived by the senses surpasses exabytes per second.
> This means Reality most likely is far more computation.
> Two options then present themselves: The world is a simulation, in which case it's most likely single-player. (Roy...)... or it's not.

>> No.8944622

same reason here

>> No.8944625

>"mathematics" is the sum total of conceivable rule sets for abstract reasoning and symbolic manipulation
>some fucktard drops acid and thinks he's reached some profound insight in asserting this

>> No.8944665

Congratulations, you have been duped.

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8943950 No.8943950 [Reply] [Original] [archived.moe]

Tell me /sci/ if your evolution is so great why aren't all species hermaphrodites/futanari capable of self impregnation without genetic issue if a mate cannot be found? That seems a much more efficient way to get offsprings.

14 replies omitted. Click Reply to view.
>> No.8944473


>When it comes to evolution, necessity is the mother of invention. No necessity? Then no invention

This is such bull. Evolution != natural selection. Some evolutionary processes are not rational to any need. Sexual selection, for example, can be almost totally random, and detrimental to fitness.

>> No.8944474

Because most everyone who ever existed had no trouble getting laid.

>> No.8944475

can you imagine every human being capable of self-replication

you could barely call them humans
after a few hundred generations, almost everyone would look different

>> No.8944485

I know I'm late but there's a serious fucking stupidly simple answer for this question.

Evolution is gradual change via mutation achieved by passing on genes that change during meiosis. If a hermaphrodite or "futanari" (aren't those things only fictional, some sort of half-man half-woman beast?) cannot pass on its genes, it cannot experience a mutation in its offspring, and thus a trait to aid in natural selection cannot be evolved because the act of reproduction wasn't possible in the first place.

>> No.8944499

Omg what if you got pregnant every time you jerked off?

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8943946 No.8943946 [Reply] [Original] [archived.moe]

Dear physicists,

what happens next? Please explain.

4 replies omitted. Click Reply to view.
>> No.8944122

Plus C

>> No.8944271

Right hand side: dx^2 = 2x dx, so replace dx^2 with 2x dx getting the integral of 2x^2 dx which is (2/3)x^3 + b
Left hand side: Simply integrate y dy, then integrate the result of that to get (1/6)*y^3 + cy + d

So (2/3)x^3 + b = (1/6)*y^3 + cy + d
Now you need to solve for b, c and d by using concrete values.

t. mathematician

>> No.8944293


double integral

>> No.8944299

you'll get 2 constants

+C and either +Cy or +Cx

someone confirm this

>> No.8944308

That makes logical sense

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