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/sci/ - Science & Math


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File: 136 KB, 1250x938, PeakOilSlide.jpg [View same] [iqdb] [saucenao] [google]
16086327 No.16086327 [Reply] [Original]

Peak oil is demonstrably false.
1. Fossil fuels are hydrocarbons from dead life.
2. The oxygen in the atmosphere, and the hydrocarbons in the ground are the product of photosynthesis.
3. Balance the chemical equation: there must be enough hydrocarbon on earth to fully replace the oxygen in the atmosphere.
Conclusion: you will literally suffocate before we run out of fossil fuels.

(PS: the oxygen in the air is technically a fossil fuel)



File: 395 KB, 1200x1480, lossy-page1-1200px-ETH-BIB-Jung,_Carl_Gustav_(1875-1961)-Portrait-Portr_14163_(cropped).tif.jpg [View same] [iqdb] [saucenao] [google]
16086322 No.16086322 [Reply] [Original]

Is interpreting dreams science?



File: 69 KB, 720x719, original.jpg [View same] [iqdb] [saucenao] [google]
16086314 No.16086314 [Reply] [Original]

You read alot about epigenetic influence on the psyche but is the reverse also true?
Can you cause epigenetic changes via certain states of mind (for example vivid repeated imaginary scenarios)?
I'm not asking how to do it or if they know which gene gets activated how just a general question.

Thank you in advance.

>> No.16086328

>>16086314
>Can you cause epigenetic changes via certain states of mind
Yes, but requires far more than you will ever be willing to risk.
>(for example vivid repeated imaginary scenarios)?
Because of this.

Subjecting yourself to true 'evolutionary pressures' requires an extreme level of intuition and and willingness to suffering BEYOND death, not before (imaginary....), because you cant trick your subconscious by pretending to believe something in front of (hypothetical) others (the environment), you say "Be afraid." but signal to your subconscious "Dont worry, its just a LARP."

>I'm not asking how to do it
You should, because your approach isnt logical or coherent to the variables.
>just a general question.
When your species is starving to death because you only eat one type of leaf...the mental anguish of starving and eating food not meant for you will fuck with your mind. An evolutoonary switch requires your entire (You) to be under stress.

>> No.16086342

>>16086314
>Can you cause epigenetic changes via certain states of mind?
Sure, psychologically torture someone for long periods and their epigenetics will change (turning on more stress response genes and the like).

Likewise you can alleviate psychological suffering due to a positive state of mind which would change your epigenome resulting in less stress related genes active.



File: 317 KB, 912x592, 1710790850912571.png [View same] [iqdb] [saucenao] [google]
16086312 No.16086312 [Reply] [Original]

Some fat people cope by saying that statistics that around 80% of people regain the weight is not true and that their uncles or whatever's lost weight and kept it off for a while. But if the statistics are false and the success rate is higher than observed and the research is faulty, percentages of overweight and obese people continue to rise, wouldn't they at least stay stagnant? Since every fat person I know wants to lose weight, so obviously if it was that easy to keep it off, people wouldn't be fat.

>> No.16086318

your hated of people larger than yourself is due to your fear of them, you know you are small and weak and they could easily crush you so you fear them and loath them.

>> No.16086325

>>16086318
I do not loathe them, they are still people regardless their size and that's it. I'm just triggered by blatant disregard of statistics, but I understand that they're really depressing if you're overweight. I just wanted to hear about inconsistencies in research that would point to a more complex dynamic regarding weight loss, that's all.
Like nobody factors in eating disorders that ex fat people develop, but nobody cares for this aspect as much, so it would be curious to see the percentage of people who have kept the weight off because of it. More so if you consider that men rarely report it and are rarely diagnosed in return

>> No.16086334

>>16086318
Or in addition to the the fact that many people with ed's hide their eating disorder because they enjoy the praise and attention, hence they keep it under wraps, some are hiding it unintentionally, so it would have also skewed the data a bit. Other people who are either clueless about their own eating disorders or the ones that simply do not have them, obviously do not see anything suspect. Trained professionals are more likely to recognize it, but a good percentage of men would be undiagnosed as mentioned earlier.



File: 51 KB, 400x335, 1707952766024698.jpg [View same] [iqdb] [saucenao] [google]
16086309 No.16086309 [Reply] [Original]

Is this correct /sci/ bros?

>> No.16086311

you have to clean your chakras, after you exercise but before getting the D

>> No.16086320

My biggest mistake was not being born after armageddon.



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16086306 No.16086306 [Reply] [Original]

Why is desalination considered such difficult and expensive technology?

All that needs to be done is to let the water evaporate in giant beds right? Is there any issue with that? Perhaps a long, flat greehouse that is 1 foot tall would work for this. fans could blow the evaporated humid air into condensers to form the fresh water.

>> No.16086315

its unnecessary, theres is already enough fresh water. it falls from the sky for free regularly. even arid regions are able to take advantage of this well enough to supply themselves with more than enough water

>> No.16086323
File: 243 KB, 494x511, 1710731072885823.png [View same] [iqdb] [saucenao] [google]
16086323

>>16086315
Yes the plentiful rainfall in Saudi Arabia

>> No.16086336

>>16086323
They have enough
They're all doing just fine, they don't need your help.



File: 178 KB, 1x1, broesch_et_al_2010.pdf [View same] [iqdb] [saucenao] [google]
16086289 No.16086289 [Reply] [Original]

https://henrich.fas.harvard.edu/sites/scholar.harvard.edu/files/henrich/files/broesch_et_al_2010.pdf

Racial difference in the age at which children can pass the mirror test have nothing to do with racial IQ differences, the age difference (18 months for whites, 6 years for blacks) is strictly a cultural phenomenon.

>> No.16086297

>>16086289
>6 years for blacks)
this seems exaggerated



File: 58 KB, 680x602, GI-lvInXQAEOu4u.jpg [View same] [iqdb] [saucenao] [google]
16086258 No.16086258 [Reply] [Original]

if the brain needs meat, then does that mean that vegans have poorly functioning brains?

>> No.16086259

>>16086258
Name a single successful vegan mathematician

>> No.16086273

>>16086259
Bait

>> No.16086279

This explains India

>> No.16086280

>>16086273
vegans btfo by the resident /sci/zo



File: 171 KB, 781x1175, 1710830564495952.jpg [View same] [iqdb] [saucenao] [google]
16086142 No.16086142 [Reply] [Original]

Decided I won't do a PhD, which means my former dreams of making significant contributions to science will probably never come true. How do I cope?

>> No.16086180
File: 888 KB, 388x398, alien-doggyalien.webm [View same] [iqdb] [saucenao] [google]
16086180

>>16086142
if you can make a lot of money you could always hire scientists to do the science for you

>> No.16086199

Make significant contributions to science without the PhD.

>> No.16086210
File: 81 KB, 449x602, tibees.jpg [View same] [iqdb] [saucenao] [google]
16086210

>>16086142
Become a YouTuber until you hit the wall.

>> No.16086298

>>16086142
you sure do seem to like talking about yourself on social media



File: 153 KB, 1426x669, vertebrate-ancestor.jpg [View same] [iqdb] [saucenao] [google]
16086134 No.16086134 [Reply] [Original]

how the FUCK could a balanoglossus (penis worm) share any genes with (lamprey eel)?

but still balanoglossus genes point out towards lamprey eel more than any other vertebrate

it is a hemichordate worm, it is 500 million years old and still lives
it has 6 gill slits, altough not visible, just like ancient fish had (they have it visible)
hemichordates do not have eyes but its possible they lost their eyes during 100 million years of evolving towards being like earthworms of the sea, as they do the same thing earthworm does on land, but hemichordate is still not related to earthwom in any way

it doesnt need eyes if its buried for all its life

in this gene comparison there was 33 organisms and all others are vertebrates and one hemichordate was thrown in for good measure

his genes should be completely different from vertebrates but what do you know, its has some percentage of clear connection to lampreys the most primitive fish

>> No.16086138

>>16086134
That's because balanoglossus represent an evolutionary link between invertebrates and vertebrates. So the evolution would look something like this:

Invertebrates -> Balanoglossus -> Lamprey -> other Vertebrates

>> No.16086195

>>16086134
Why are you spamming this?

>> No.16086274

>>16086195
>>16086138

I need to bring this knowledge forwards because no biology book will mention the similarity in between genes

Biology text books are only about basics of biology. Genetic relations are only known to biologists themselves and not found in books.

>> No.16086300
File: 49 KB, 220x220, ljSZ-kOHnwKwczDH1gez7VE7DAlv58niitgiTaddAm8.png [View same] [iqdb] [saucenao] [google]
16086300



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16086125 No.16086125 [Reply] [Original]

This has been the easiest Ramadan of my life. To whoever invented Ozempic, Allah bless you sir. How long until they make a drug to stop thirst too?

>> No.16086127

taking hunger suppressing drugs to get through ramadan is the most Jewish thing I've ever heard in my life and you will be going straight to hell

>> No.16086132

>>16086127
Kek, you try working all day without food or water, for a month straight. I expect that after more Muslims learn about it, the company that owns Ozempic will become trillionares.



File: 580 KB, 718x700, 1705341350985499.png [View same] [iqdb] [saucenao] [google]
16086069 No.16086069 [Reply] [Original]

It is under dispute

https://tekniikanmaailma.fi/lehti/5b-2024/syntyyko-aikuisellekin-lisaa-aivosoluja/

Petri Paavilainen from Helsinki university neuroscience says "it is under dispute. for a long time people thought no new nerve cells will appear in the brain once you have been born, altough brain (and your head) will continue to grow in size after birth"

"in 1980-1990 there was some Finnish research which showed a few new braincells did got formed by the age of 7"

However since 2022 American Alvaro Duque from Molecular Psychiatry magazine says "the 90s research was bogus and no new nerve cells will form"

It is known for 100% certainty that lesser vertebrates which are not as complex as a human, fish, some frogs, do grow new nerve cells in their brain at all times. Maybe this is the reason they have so bad memory? A new nerve cell is initially blank state and doesnt contain memory. A 100 year old human nerve cell contains a lot of info.

We need to figure out if apes grow new cells because they are closest to a human being.

4 replies omitted. Click Reply to view.
>> No.16086229

>>16086217
>the lower classes had no pressure but the upper classes always searched for more knowledge
being smart didn't do much for you, or could even have you killed back in those days, if not royalty.
retarded or not royalty had all chances to reproduce.
people died way younger back then, so brain had to be good for 30-40 years. plus knowledge was seen as magic in many places, plenty burned for being smart or asking questions.

>> No.16086242

>>16086229
no not really
>being smart didn't do much for you, or could even have you killed back in those days
like this is true but
people easily lived up to 50
you just needed to survive childhood diseases although yeah bacterial infections were much more common because they didn't know shit about hygiene and sewage treatment
>knowledge was seen as magic in many places, plenty burned for being smart or asking questions.
and this generally wasn't true
like even the old testament distinguishes wisdom from knowledge
wisdom is more God-given but knowledge is certainly obtainable by humans by thinking

I guess you make fair point
in general even among upper classes there's just no evolutionary demand of becoming even smarter

>> No.16086252

>>16086242
yeah but difference between wisdom and knowledge is if you were serving the right people, basically. I mean in practice. but I haven't lived in those times so yeah, we can only believe what history left for us (many times curated by the very ones making that distinction).

>> No.16086271

where did the neurogenesis thing come from with Lion's Mane? was there any study on it?

>> No.16086288

>>16086252
>many times curated by the very ones making that distinction
I don't entirely agree with you, but you're right about this
Lots of wisdom statements are detrimental to the elite class so it's not as simple as
>say good thing about elite = wise



File: 374 KB, 1709x1725, nairaland meme.jpg [View same] [iqdb] [saucenao] [google]
16086041 No.16086041 [Reply] [Original]

i was just perusing nairaland and i noticed they like the same kind of memes that /sci/ does

>> No.16086050
File: 136 KB, 460x720, 17501576_b1bd9798ce302ee253c431a41361725e_jpeg877d256388886141fd4b1ef2fd15af83.jpg [View same] [iqdb] [saucenao] [google]
16086050

another brilliant nairaland science meme

>> No.16086285
File: 486 KB, 494x676, 1ASUr.png [View same] [iqdb] [saucenao] [google]
16086285

>> No.16086313
File: 187 KB, 650x857, 1710826129780804.gif [View same] [iqdb] [saucenao] [google]
16086313

>> No.16086316

>>16086050
this is nostalgic



File: 533 KB, 1498x786, eere.png [View same] [iqdb] [saucenao] [google]
16086036 No.16086036 [Reply] [Original]

what does it mean bros?



File: 63 KB, 1280x769, wvfy6.jpg [View same] [iqdb] [saucenao] [google]
16085997 No.16085997 [Reply] [Original]

Science has proved that women in the workforce means that low IQ women have more children than high IQ women. What will be the long term effect of this for society?

1 replies omitted. Click Reply to view.
>> No.16086018

>>16085997
/sci/ will get worse over time.
Case in point ->>16086013

>> No.16086272

>>16086018
How do we keep the children of low IQ mothers, such as >>16086013, out of /sci/?

>> No.16086307

>>16085997
>What will be the long term effect of this for society?
Society will self-correct via Nazism (the immune system of societies)

>> No.16086329
File: 140 KB, 1890x1032, selection.jpg [View same] [iqdb] [saucenao] [google]
16086329

>> No.16086333

more brown people and less good things



File: 108 KB, 720x480, 2022_720x480headers_0006_small_bee-honeycomb.jpg [View same] [iqdb] [saucenao] [google]
16085990 No.16085990 [Reply] [Original]

What are some realistic solutions to the death of bees worldwide? What can be done to prevent them from becoming an endangered species?

4 replies omitted. Click Reply to view.
>> No.16086201

Solution? Why i want the bees to die because they are a annoying and filthy species. The real question should be how can we make them extinct faster?

>> No.16086203

>>16086161
Are you serious? Aren't they hymenoptera?

>> No.16086207

why is bee barf so good

>> No.16086209

>>16086203
They are, he’s just retarded. That tree would be wildly incorrect if you were looking at it trying to see evolutionary relationships, but seeing as this guy apparently can’t read a phylogenetic tree to begin with I wouldn’t believe any of the relationships he posts

>> No.16086220

>>16086203
>>16086209
none of the others in the tree are hymenopterans in the first place



File: 12 KB, 708x214, file.png [View same] [iqdb] [saucenao] [google]
16085950 No.16085950 [Reply] [Original]

A robot may not injure a human being or, through inaction, allow a human being to come to harm. A robot must obey orders given it by human beings except where such orders would conflict with the First Law. A robot must protect its own existence as long as such protection does not conflict with the First or Second Law.

1 replies omitted. Click Reply to view.
>> No.16085980 [DELETED] 

a robot must not say [SPOILER]nigger[/spoiler] under any circumstances no matter how crucial or essential it may seem to the wellbeing of anyone or anything

>> No.16085981

>>16085950
a robot must not say nigger under any circumstances

>> No.16085988

>>16085950
Asimov wrote entire books about how those laws could still end up being insufficient.

>> No.16086010

>>16085988
robot mistakenly bumps the flower pot on the window and it drops and kills someone. this is inevitable to some degree, there will be freak accidents no matter their programming

>> No.16086025

>>16085950
I guess it's the first rule, it's not allowed to harm anyone's feelings. I suppose there's a chance a large African man is sitting beside you when you ask it that so it can't take the chance. Maybe in the future it will be able to access your web cam and see that there are no Africans in your vicinity and will let you say the racist thing. There's also a chance that chatgpt was programmed to be PC so that it's output couldn't be used against itself. Like if they prevent it from saying nigger they're not only denying racists the ability to say nigger but also protecting themself from chatgpt being accused of being racist and having to deal with all that stuff



File: 752 KB, 1920x1200, 1288806600170.jpg [View same] [iqdb] [saucenao] [google]
16085923 No.16085923 [Reply] [Original]

Previous thread: >>16056951

>what is /sqt/ for?
Questions regarding maths and science. Also homework.
>where do I go for advice?
>>>/sci/scg or >>>/adv/
>where do I go for other questions and requests?
>>>/wsr/ >>>/g/sqt >>>/diy/sqt etc.
>how do I post math symbols (Latex)?
rentry.org/sci-latex-v1
>a plain google search didn't return anything, is there anything else I should try before asking the question here?
scholar.google.com
>where can I search for proofs?
proofwiki.org
>where can I look up if the question has already been asked here?
warosu.org/sci
eientei.xyz/sci
>how do I optimize an image losslessly?
trimage.org
pnggauntlet.com
>how do I find the source of an image?
images.google.com
tineye.com
saucenao.com
iqdb.org

>where can I get:
>books?
libgen.rs
annas-archive.org
stitz-zeager.com
openstax.org
activecalculus.org
>articles?
sci-hub.st
>book recs?
sites.google.com/site/scienceandmathguide
4chan-science.fandom.com/wiki//sci/_Wiki
math.ucr.edu/home/baez/physics/Administrivia/booklist.html
>online courses and lectures?
khanacademy.org
>charts?
imgur.com/a/pHfMGwE
imgur.com/a/ZZDVNk1
>tables, properties and material selection?
www.engineeringtoolbox.com
www.matweb.com
www.chemspider.com

Tips for asking questions here:
>attach an image (animal images are ideal, you can grab them from >>>/an/. Alternatively use anime from safebooru.donmai.us)
>avoid replying to yourself
>ask anonymously
>recheck the Latex before posting
>ignore shitpost replies
>avoid getting into arguments
>do not tell us where is it you came from
>do not mention how [other place] didn't answer your question so you're reposting it here
>if you need to ask for clarification fifteen times in a row, try to make the sequence easy to read through
>I'm not reading your handwriting
>I'm not flipping that sideways picture
>I'm not google translating your spanish
>don't ask to ask
>don't ask for a hint if you want a solution
>xyproblem.info

9 replies omitted. Click Reply to view.
>> No.16086276

>>16086190
>Fe + CuCl2 -> FeCl2 + Cu
Ionic states. Fe ion is Fe2+/3+
Cu ion is Cu2+
like magnets + and + repels.
Cl ion is Cl- so it attracts to Fe2+ ans Cu2+
They replace themselves because of electrochemical potential
electronegativity has to do with that but is only an indicator, it doesn't have strong predictive value
>Cl2 + NaBr -> NaCl + Br
*Cl2 +2 NaBr -> 2 NaCl + Br2
Cl has much stronger electronegativity. It makes more sense. The sense behind it is quantum mechanics and too hard for humans to grasp. Like I cannot explain WHY Cl binds better than Br but we know that Cl has higher electronegativity. There's rules to this with exceptions but if you can see the patterns then you can understand quite a few reactions.
>AgNO3 + MgCl2 -> AgCl + Mg(NO3)2
NO3 has no reason to break. It can bind to Mg very well. There's nothing preventing it or. forcing it to break to NO2. NO3 is much more stable anyways because the electron cloud can be spread over more elements (this doesn't always apply. huge proteins are less stable than smaller molecules)
Don't bother learning affinities. Learn the reactions and see how and why.
Learn the easy stuff first so acid base, electrochemistry, buffers. Then you've got a decent background and see the patterns (again many exceptions)
like i didn't know that br gets replaced in that reaction but i know Cl is a smaller. molecule and binds stronger than a big molecule than Br. In a salt Na would love to bind with the strongest possible ion so it'll go with Cl- over Br-
But I honestly don't know if the reaction as you describe it will work
it seems to make sense but that doesn't mean it will work like that
chemistry isn't math, especially organic chemistry. That's basically magic pretending to be science.

>> No.16086284

What stains carpet the worst? Like incurably bad? Something worse than coffee or wine?

>> No.16086291

>>16086284
4000 yearer
Catherine

>> No.16086340

Let [math]v,\, w \in V[/math] be linearly independent vectors. I want to know, if [eqn]v \otimes v + w \otimes w[/eqn]is an elementary tensor. I'd say yes, because you can write[eqn]v \otimes v = \sum_{i,\, j \in I} (v)_{b_i} (v)_{b_j}e_{i,\, j}[/eqn]and similarly for [math]w \otimes w[/math]. So when you define[eqn](u)_{b_i} = (v)_{b_i}(w)_{b_i}[/eqn]for [math]i \in I[/math], you should get a vector [math]u \in U[/math] with[eqn]u \otimes u = v \otimes v + w \otimes w.[/eqn]Hence, [math]u \otimes u + w \otimes w[/math] should be an elementary tensor.

Is it correct? If not, were's the mistake?

>> No.16086344

v = shitted
w∈V = shitted and farted
v⊗v=∑i,j∈I(v)bi(v)bjei,j = you shitted and you farted



File: 783 KB, 844x1306, 03-18-18-47-51.png [View same] [iqdb] [saucenao] [google]
16085843 No.16085843 [Reply] [Original]

https://www.popsci.com/environment/bald-eagle-eggs-wont-hatch/
Its too cold in southern California for bird eggs to hatch this year

10 replies omitted. Click Reply to view.
>> No.16086058

>>16085843
>Is this global warming?
Do not know, do not care. But nice pic.

Propaganda is now climate change btw..
(braindead wording for braindead people)

>> No.16086072

>>16086047
>hot weather - yep thats global warming
>cold weather - yep thats global warming
>average weather - yep thats global warming
>windy - yep thats global warming
>flooding - yep thats global warming
>drought - yep thats global warming

>env science focus in college
did you choose that because you can't do math?

>> No.16086075

>>16086072
The global temperature is going up, weather doesn't actually matter.

>> No.16086087
File: 150 KB, 980x1024, IMG_6874.jpg [View same] [iqdb] [saucenao] [google]
16086087

those eagles are fucked, you capitalist pigs!
https://www.bitchute.com/video/8AHkAJrpAxd4/

>> No.16086095

>>16085939
>it's cold in America
>not really
>YOU ARE KILLING AMERICA



File: 300 KB, 775x849, 63626 - SoyBooru.png [View same] [iqdb] [saucenao] [google]
16085822 No.16085822 [Reply] [Original]

The arithmetic progression of the form 3n+1 contains at least one prime.
Assume it doesn't, then for any natural a, b, (3a+2)(3b+2)=3c+1 so that there is a bijection between naturals c and (a, b).

But notice that (3a+2)(3b+2)=((3a+1)+1)((3b+1+1))=((3x+2)(3y+2)+1)((3z+2)(3w+2)+1)

Notice something weird?
You guessed it if you look at mod 3, the remainder (number not factored by x or y or z or w) tends to a very big number the more such "nesting" is performed on the form (3n+2).

Brilliant! In fact this proof works for every prime p and 0 < q <p for the progression pn+q.

I won't tell you the details of course because I don't want to spoil anything (hint: just decompose a progression into corresponding multiples of progressions(

>> No.16085829
File: 25 KB, 721x789, 19812 - SoyBooru.png [View same] [iqdb] [saucenao] [google]
16085829

Implicitly, [math]\alpha(n)=3n+1[/math] is and endomorphism on the natural numbers and so is [math]\phi(a, b)=(3a+2)(3b+2)[/math] so that the composition [math]\alpha^{-1}\circ\phi[/math] is a bijection.
Then there's nesting [math]\phi=(\phi+1)(\phi+1)[/math]
And finally there's a contradiction since there is a very big margin in the image of [math]\alpha^{-1}\circ\phi[/math] once nesting is applied.
Hence there is at least one prime number.

Tadaa..

>> No.16085833

>>16085829
Uhhh I meant a surjection

>> No.16085899

>Numbers that are +1 or -1 an even number have a chance of being prime.
Holy shit

>> No.16086346

>>16085899
If you are so smart why don't you show me there is a prime number in any good irreducible polynomial?

Right, you can't, because you are a retarded nigger who doesn't understands the subjwct