/sci/ - Science & Math

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Anonymous Thu 21 Apr 20:29:53 2022 No.14416439 View Reply Original Report

Quoted By: >>14419419 >>14420133

What kind of math do I need to learn to understand this structural geology textbook

20 posts and 1 image omitted

Anonymous

Anonymous Fri 22 Apr 2022 22:47:10 No.14419419 Report

Quoted By:

>>14416439
Well it's physics, so
>Algebra
>Calculus
>Linear Algebra
>Tensors

Anonymous

Anonymous Sat 23 Apr 2022 04:23:19 No.14420104 Report

Quoted By:

>>14419334
You said as you started to talk about muh liquid isotropicalness.

Its just useless to divide the problem instantly (isotropic/anisotropic) without even one single calculation. Treat everything anisotropic, if you find some "mathematically pure" substance, then some of the factors are zero.

Anonymous

Anonymous Sat 23 Apr 2022 04:56:15 No.14420133 Report

Quoted By: >>14420312

>>14416439
To understand this page you only need to know this:
1) Sum/subraction of matrices is sum/subtraction of its elements
2) In this context, isotropic = all diagonal elements the same (\sigma_m from 5.15). And anisotropic = diagonal elements different (\sigma_{idev}).

I initially thought that this could be interpreted as some sort of covariance matrix, but it can't be. It is only written in terms of sigma and not sigma^2, and its not a Cholesky matrix either.

As for the textbook, I don't know because I haven't checked the content. For all we know it could be how the OP is fucking dumb.

Anonymous

Anonymous Sat 23 Apr 2022 05:29:04 No.14420173 Report

Quoted By:

>>14418806
Not him, but you're welcome.

Anonymous

Anonymous Sat 23 Apr 2022 07:16:03 No.14420312 Report

Quoted By:

>>14420133
My dear sir, thank you for gracing this thread with your profound genius. I may only hope to glean even a fraction of what you’ve posted here today. God bless you.

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Anonymous Fri 22 Apr 09:26:48 2022 No.14417885 View Reply Original Report

Quoted By: >>14420053 >>14420155

Do you think we trapped in a time loop? It seems to me that it is inevitable that everything repeats infinitely many times given infinite time. If you do or do not, explain your reasoning.

6 posts omitted

Anonymous

Anonymous Sat 23 Apr 2022 03:43:33 No.14420053 Report

Quoted By: >>14420123

>>14417885
If there was ever a stable state in time then the time loop would stop. Or if there's an irreversable change at some point then the loop would stop

Anonymous

Anonymous Sat 23 Apr 2022 04:22:56 No.14420101 Report

Quoted By: >>14420123

>>14418940
A time loop would just be a cycle in that case, and judging by the persistence of cyclical behavior, seems like eternalism could be the case.

Anonymous

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Anonymous Sat 23 Apr 2022 04:45:53 No.14420123 Report

Quoted By:

>>14420053
>>14420101
I hate this bullshit. I never asked to exist yet existence has me as it's eternal prisoner. Fucking existence...

The only way to escape existence then would mean to get on welfare somehow and get high every other day, isn't it?

Anonymous

Anonymous Sat 23 Apr 2022 05:13:34 No.14420155 Report

Quoted By: >>14420311

>>14417885
Kill yourself and find out. If you don't have the balls to test your "theory", STOP CONSOOOOOOOOOOOOOOMING POP SCI.

Anonymous

Anonymous Sat 23 Apr 2022 07:15:30 No.14420311 Report

Quoted By:

>>14420155
How would I find out if I killed myself? If it's true then I'd just wake up at my earliest memories forgetting about what just happened entirely. If it's false then I'd just be dead and unable to think about anything.

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Anonymous Fri 22 Apr 22:47:25 2022 No.14419422 View Reply Original Report

Quoted By: >>14419437

Are there minerals in earth we havent found yet thats going to be more expensive than diamonds and emeralds? theoretically speaking.
Or are we sure that we have found everything earth has to offer already?

Anonymous

Anonymous Fri 22 Apr 2022 22:53:43 No.14419437 Report

Quoted By:

>>14419422
i would guess that, too costly

Anonymous

Anonymous Fri 22 Apr 2022 23:26:43 No.14419516 Report

Quoted By: >>14419548

Diamonds and such are useless and Jewish
They were mining coal, the mine was exhausted. But they wanted to make profit. Hence they took diamond from there and marketed it

Anonymous

Anonymous Fri 22 Apr 2022 23:31:34 No.14419528 Report

Quoted By:

yes new minerals are still being discovered every few years so more are likely to be discovered, hard to predict their economic value though.
one thing that will be cool hundreds of thousands of years in the future is when buried man made materials slowly get subducted and metamorphize into strange new rocks/minerals

Anonymous

Anonymous Fri 22 Apr 2022 23:36:27 No.14419548 Report

Quoted By: >>14420306

>>14419516
diamonds have lots of useful industrial uses

Anonymous

Anonymous Sat 23 Apr 2022 07:12:28 No.14420306 Report

Quoted By:

>>14419548
industrial diamonds are cheap af, natural diamonds are not

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Anonymous Fri 22 Apr 16:21:43 2022 No.14418478 View Reply Original Report

Quoted By:

Not my problem

24 posts and 4 images omitted

Anonymous

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Anonymous Sat 23 Apr 2022 00:34:56 No.14419673 Report

Quoted By:

>>14419410
>Otherwise African slaves would be the richest people in the world
but they are though sir?

Anonymous

Anonymous Sat 23 Apr 2022 00:36:26 No.14419677 Report

Quoted By:

>>14418579
Just go straight to communism then, otherwise you won't be able to prevent people from becoming rich.

Anonymous

Anonymous Sat 23 Apr 2022 06:44:51 No.14420266 Report

Quoted By: >>14420270

>>14418715
>basic evolutionary strategy of producing more offspring in less stable environments is somehow the fault of billionaires.

You're retarded.

Anonymous

Anonymous Sat 23 Apr 2022 06:45:43 No.14420268 Report

Quoted By:

>>14419505
high tide marks

Anonymous

Anonymous Sat 23 Apr 2022 06:47:12 No.14420270 Report

Quoted By:

>>14420266
food aid programmes were a scam

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Anonymous Sat 23 Apr 02:23:11 2022 No.14419879 View Reply Original Report

Quoted By: >>14419885 >>14420260 >>14420263

Let’s say hypothetically dinosaurs evolved refined intelligence like human beings. How much harder would it be for a creature of that size to travel space?
What is the optimal size from a physics stand point to travel space?

Anonymous

Anonymous Sat 23 Apr 2022 02:25:22 No.14419885 Report

Quoted By: >>14419964

>>14419879
I like to imagine that if dolphin or elephant brains were somehow placed inside of a human body, they wouldn’t be very different from us, at least in terms of intelligence.

Anonymous

Anonymous Sat 23 Apr 2022 02:55:13 No.14419964 Report

Quoted By: >>14419999

>>14419885
a lot of research into animal intelligence makes so much more sense if you stop assuming intelligence is the differentiating factor between "humans and animals" and start looking instead at language.

language allows humanity to create what is essentially a hive mind superintelligence almost by accident - this is why a singularity based on AI "exceeding individual human ability" is an unfounded fear: the real intelligence such an AI would have to overcome would be the superintelligence formed by the communication of the entire human species, and there's genuinely no feasible way currently for AI to even approach the energy/matter efficiency of a meat brain.

Anonymous

Anonymous Sat 23 Apr 2022 03:07:48 No.14419999 Report

Quoted By:

>>14419964
yeah that makes sense. A human that never learns language becomes like a caveman. But there are dogs that are taught how to talk with buttons and they seem like geniuses. I’m not sure why we haven’t developed technologies for, let’s say, chimpanzees, in zoos, so that they could all use a device that allows them to use human languages to communicate. After a while the chimps might be able to learn from other chimps themselves, and more and more vocabulary could be introduced.

Anonymous

Anonymous Sat 23 Apr 2022 06:40:47 No.14420260 Report

Quoted By:

>>14419879
Reptiles can just sleep in cold during long space flight.

Anonymous

Anonymous Sat 23 Apr 2022 06:43:13 No.14420263 Report

Quoted By:

>>14419879
>all dinosaurs had one size

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Anonymous Fri 22 Apr 04:57:32 2022 No.14417516 View Reply Original Report

Quoted By: >>14418598 >>14419376 >>14420255

If you had the resources and tech to build a Dyson sphere, you wouldn't need to build one.

It would be like inventing internal combustion engines in order to construct an impractically huge horse cart.

14 posts omitted

Anonymous

Anonymous Fri 22 Apr 2022 17:14:25 No.14418598 Report

Quoted By:

>>14417516
if civilization's energy use continues to increase you eventually need to generate as much power as a star, so why the fuck wouldn't you just use a star that's already there?
>>14417607
where are ya dumping your waste heat? Also, would such civilization using gluon tech be detectable? The nice thing about dyson sphere is that they have a signature we could potentially detect.

Anonymous

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Anonymous Fri 22 Apr 2022 22:34:08 No.14419376 Report

Quoted By:

>>14417516
What if it's Dyson spheres and not dark matter?

Anonymous

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Anonymous Fri 22 Apr 2022 22:43:32 No.14419405 Report

Quoted By:

>>14418455
/sci/ is mainly populated by mentally ill people who have absurd delusions of grandeur and spend their lives escaping from the reality which disproves their delusions by living inside the space fantasies that were placed in their heads by Hollywood, anime, video games and comic books.
If you're exhausted by their tedious endless repetition of the same comic book concepts over and over an over again then unfortunately you're out of luck, they are not capable of inventing their own concepts, they can only repeat what they've already seen from others, so they aren't capable of breaking out of their cycle of repetition on their own.
For more info on the topic, look up Yuri's "reasoning with demoralized people" meme

Anonymous

Anonymous Sat 23 Apr 2022 03:06:54 No.14419998 Report

Quoted By:

>>14417709
we're far better off just fusing hydrogen ourselves

Anonymous

Anonymous Sat 23 Apr 2022 06:34:23 No.14420255 Report

Quoted By:

>>14417516
Do you know why we built the pyramids or sent people to the moon? Science and worship are the secondary motivations for great projects. We tell ourselves and others that the nuclear bomb was necessary or flight was to improve travel but it's all just a cover for the truth.

Humans, especially men, build things because they're FUCKING COOL. GIANT BUILDINGS AND SHIPS FOR TRAVELING NEW MEDIUMS ARE AMAZING. Humanity will try to build a dyson sphere not because we need to solve an energy problem but because a giant sphere around a star is ABSOLUTELY RADICAL.

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ARC

Anonymous Sat 23 Apr 02:25:02 2022 No.14419884 View Reply Original Report

Quoted By: >>14420129

So, I don't know much about physics, nuclear energy and stuff beyond what popsci magazines show, but I've been reading about high temp superconductors, specifically REBCO tapes and how they seem promising. However, I then read about ARC, which is supposed to be a fusion reactor that uses the tech to manage plasmas for nuclear fusion.
However, I noticed that their website only says ARC will produce "plasmas which generate more energy than they consume, becoming the first net-energy fusion machine", yet they don't explain how, and apparently have not even tested the tech before...:
https://cfs.energy/technology/#sparc-fusion-energy-demonstration
Is this bullshit and a scam or something?

Pic unrelated.

Anonymous

Anonymous Sat 23 Apr 2022 03:05:14 No.14419989 Report

Quoted By: >>14420106

SPARC is the test. The physics is here: https://www.cambridge.org/core/journals/journal-of-plasma-physics/collections/status-of-the-sparc-physics-basis
It's not a new design, so it's not like they're doing anything too stupid. The blanket is new, however, so that might be a pain.

Anonymous

Anonymous Sat 23 Apr 2022 04:23:42 No.14420106 Report

Quoted By: >>14420249

>>14419989
>SPARC is the test.
from what I can gather, SPARC is still being built and there have been 0 tests doing any fusion whatsoever

>The physics is here
well, that's nice, but AFAIU, those are computational models, right?

>>14419989
>It's not a new design, so it's not like they're doing anything too stupid
AFAIU (not much, really), the big advantage here is the more powerful electromagnet, right?

I mean, I hope they are successful, but they claim the reactor is expected to return a gain of ~ 11 as wikipedia say (citing one of those papers). isn't that going too far?

Anonymous

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Anonymous Sat 23 Apr 2022 04:55:28 No.14420129 Report

Quoted By: >>14420192

>>14419884
I saw an arc tractor in the first iron man movie

Anonymous

Anonymous Sat 23 Apr 2022 05:47:58 No.14420192 Report

Quoted By:

>>14420129
that's what they named it after

Anonymous

Anonymous Sat 23 Apr 2022 06:31:25 No.14420249 Report

Quoted By:

>>14420106
the models say it'll work. I have no way of evaluating the models, so all we got is that tokamaks have worked in the past. you'd probably like https://www.youtube.com/watch?v=KkpqA8yG9T4 if you haven't seen it

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Anonymous Sat 23 Apr 04:55:30 2022 No.14420131 View Reply Original Report

Quoted By: >>14420145

Economics
Previous thread: >>14395827
How does one analyze a country's economy? Is it necessary to know their economic history?

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Problem for /sci/ to solve

Anonymous Wed 20 Apr 02:19:43 2022 No.14411604 View Reply Original Report

Quoted By:

Does picrel have a positive integer solution for every 'n' when n > 1?

19 posts and 3 images omitted

Anonymous

Anonymous Fri 22 Apr 2022 05:39:39 No.14417582 Report

Quoted By: >>14418429

>>14415747
like this?
$\begin{eqnarray*} \frac{4}{n} &=& \frac{1}{x} + \frac{1}{y} + \frac{1}{z} \\ &=& \frac{1}{2} + \frac{1}{3} + \frac{1}{6} \\ \frac{6}{6} &=& \frac{3}{6} + \frac{2}{6} + \frac{1}{6} \\ \frac{4}{6} &=& \frac{6}{6} \end{eqnarray*} $

Anonymous

Anonymous Fri 22 Apr 2022 12:50:08 No.14418083 Report

Quoted By: >>14418084

By the Erdos-Straus (I think) theorem, that equation has non-trivial solutions for every natural n

Anonymous

Anonymous Fri 22 Apr 2022 12:51:33 No.14418084 Report

Quoted By:

>>14418083
FUCK I looked it up and it's a conjecture not a theorem FUCK NIGGERS

Anonymous

Anonymous Fri 22 Apr 2022 16:00:45 No.14418429 Report

Quoted By:

>>14417555
>>14417582
I now realize this problem is beyond my means.

Anonymous

Anonymous Sat 23 Apr 2022 05:05:21 No.14420148 Report

Quoted By:

i can only think of niggers when i see the letter n

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Metathinking

Anonymous Fri 22 Apr 06:39:55 2022 No.14417653 View Reply Original Report

Quoted By: >>14419315 >>14419764 >>14420116

Post some books on improving my thinking. I went from a struggling B student to a coasting A math student in one year thank to the pic related.

12 posts omitted

Anonymous

Anonymous Fri 22 Apr 2022 22:10:32 No.14419315 Report

Quoted By:

>>14417653
I have one. Get a real job. Everything becomes trivially easy after working because, while most work is easy, the problems themselves are messy and don't always have clean answers.

Anonymous

Anonymous Fri 22 Apr 2022 22:11:38 No.14419322 Report

Quoted By: >>14419351

>>14418216
Cringe. Redditor begone.

Anonymous

Anonymous Fri 22 Apr 2022 22:20:28 No.14419351 Report

Quoted By:

>>14419322
Seethe, loser.

Anonymous

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Anonymous Sat 23 Apr 2022 01:17:23 No.14419764 Report

Quoted By:

>>14417653

Anonymous

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Anonymous Sat 23 Apr 2022 04:36:39 No.14420116 Report

Quoted By:

>>14417653

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Problem for /sci/ to solve

Metathinking