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/sci/ - Science & Math

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16136167 No.16136167 [Reply] [Original]

What do you think about this idea for a starship engine the engine has a gravity based drive which works by increasing its own density in order to navigate to denser or lesser dense targets the fuel required would therefore be constant rather than proportional to the distance travelled

6 replies omitted. Click Reply to view.
>> No.16136225

>>16136220
khan academy is brainlet shit, just go through the fast track https://sheafification.com/the-fast-track/

>> No.16136237

>>16136225

Cool, thanks!

Now can you point the class to a site that has some actual content, rather than just table of contents?

>> No.16136246

>>16136220
As far as im concerned dense objects are more affected by gravity

>> No.16136288

>>16136246
Ah, then you must not be a follower of Galileo.

>> No.16136294

>>16136288
im just entertaining the ideas of special relativity for the purpose of arguments and curiosity aka the knowledge i pirated from the shemites


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16136101 No.16136101 [Reply] [Original]

https://en.wikipedia.org/wiki/Monoamine_oxidase_A

How do we solve the issue of the nigger gene?

>> No.16136130

>>16136101
Cats are the niggers of animals.

>> No.16136135

>>16136130
Yes actually, AAA and SSS. Which is close but no cigar and the ash


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16136098 No.16136098 [Reply] [Original]

So this afternoon (around 18:30) i took a picture of this amazing view of a complete rainbow (if you look well enough you can even see the moon between the first and the second one).

When i looked at the photo i noticed that the color of the sky changes a lot over and under the rainbow. I've never seen (or noticed?) something like this.
What is even stranger is the fact that the sun was setting on the opposite side of the sky, so you would expect the sky's colours to get gradually darker when approaching the horizon under the rainbow. But this picture depicts the opposite: they are brighter under the bow and darker over it

I'm quite new to 4chan, so i dont know where i should post this. I will put it for now in /sci and /an. Thanks for the attention.

>> No.16136116

>>16136098
the interior part of a rainbow is reflecting the sun so it always looks a little whiter than the surrounding sky. the actual rainbow part is chromatic aberration.

>> No.16136376

>>16136098
Rainbows are basically always seen with sun behind you since that's the way reflections work. The reason why the sky changes color is the same why the rainbow exists in the first place. Some light is being reflected off water or ice or something back at you The reflection is happening in a wide area, not just where the colors are visible which should be fairly intuitive, otherwise rainbows would immediately disappear when you exit their sweet spot.


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16136071 No.16136071 [Reply] [Original]

I need to learn linear algebra over the summer, I've heard good things about this textbook and I saw it has a new edition that came out this year. Has anyone read it? What's your favorite linear algebra textbook?

15 replies omitted. Click Reply to view.
>> No.16136293

>>16136071
just start reading lazy fag.

>> No.16136297

>>16136071
Bourbaki Algebre 1-3

>> No.16136305

>>16136166
Hefferon is a meme. Garbage written for CS grads written by a brainlet who doesn't understand linear algebra to begin with. You're better off reading random lecture notes than that abortion

>> No.16136311

>>16136071
Lang's algebra has a great chapter in linear algebraä

>> No.16136322

>>16136175
based


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16136066 No.16136066 [Reply] [Original]

Hey faggots. I just got finished studying some category theory, now time for some serious Haskell programming. How do we get more women interesting in S.T.E.M.? I think rape culture is to blame. Maybe hiring more female professors will help. Anyway I’m glad to see Homotopy Type Theory gaining traction. It’s a better and more satisfying foundation than ZFC, and is generally more friendly to GLBT folks and has very little rape culture or toxic masculinity compared to classical foundations.

I’m quite pleased with the wat things are going in science and around the world. Sexism is on the decline (but still the biggest problem in the world) and we are bringing peace and equality to many toxic Muslim countries. HoTT will supplant ZFC, making universities truly safe spaces for GLBT folks. I think the next ten years are going to be very good for everybody.

>> No.16136390

>>16136066
>How do we get more women interesting in S.T.E.M.?
more like how do we get more HOT women interested in stem haha amirite?


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16136042 No.16136042 [Reply] [Original]

China unironically need open borders and mass immigration to avoid economical and demographic collapse

14 replies omitted. Click Reply to view.
>> No.16136263

>>16136258
Western Countries will become Turd World hellholes before China/Japan etc collapse because of population decline.
200 years from now East Asia will still be populated by East Asians unlike the West where Whites will go extinct.

>> No.16136265

>>16136258
Ok smart guys. Explain how to run an economy when half the population is above the age of 50. Do note that not a single fucking developed nation has managed to raise birth rates. And raising birth rates don't kick in until like 20 years down the line too

>> No.16136269

China wants a population collapse. That was their idea, its gooid for them as they dont need so many people.
The chinese understand the burden of caring for a lot of old people is better than just growing more billions of chinese eaters. These old folks dont live for long anyway.

>> No.16136271

>>16136263
Japan and SK are both accepting mass immigration too retard. Their economy was suffering due to population decline for years. Only China is a holdout and even then, it's only a matter of time

>> No.16136273

>>16136265
>Explain how to run an economy when half the population is above the age of 50.
You run it with the younger people, and just carry the old people as a burden. Reduce the burden somehow by keeping the elderly poor, with minimal medical services.


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16135990 No.16135990 [Reply] [Original]

So, everyone knows that the most if not all of the Neom projects are fake. But what’s the truth behind them? Money laundering? Generating buzz? Shooting high and maybe something above-average emerges?

8 replies omitted. Click Reply to view.
>> No.16136369

>>16136200
In Russia the oligarchs don't actually control the state so a billionaire stealing from the national oil company makes sense. Here the prince not only controls the oil company directly, is the head of state and absolute monarch but also the guy supposedly committing fraud. Have you taken your meds recently? He's stealing from himself, to take money he already has and can access anyways because...?

>> No.16136460

>>16136209
*shrug* Google Gazprom corruption if you’re legitimately interested in learning something. You’re not though so I’ll just leave it at that.

>> No.16136477

>>16136369
Nowhere did I suggest the Saudi crown is doing the stealing; these funds could just be a scheme to launder money for elite supporters like the Bin Laden construction company for example. Why? Because Saudi Aramco is a publically-traded company that wants to attract investors, but even before launching the IPO there are international norms they have to adhere to such as “the government can’t just transfer company assets to friends”.

>> No.16136491

it's just to generate attention. and desu it's quite effective every few weeks somebody posts about it.

>> No.16136523

>>16136491
Probably because it’s a target of gay YouTube clickbait selling giggly agitprop to get off to. “It’s SOO dumb and humans rights and environment BAD teehee~!” Not a single one points out that it’s obvious not real, that NO, there isn’t going to be a massive line city in the desert serviced by air taxis and holographic schools, all that shit is just hype to attract attention and by selling agitprop they’ve actually completely fallen for it - or they know what they’re doing and selling the agitprop to those who feel good consuming it.


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16135984 No.16135984 [Reply] [Original]

Philosopher and scientist Daniel Dennett has died.

47 replies omitted. Click Reply to view.
>> No.16136607

>>16135985
Apart from being an atheist, he also was quite innovative philosopher, so let's show some respect.
Also, hate is not a christian emotion, we shouldn't hate people, especially for their beliefs

>> No.16136623

>>16136604
Final interview, Peterson!
https://www.youtube.com/watch?v=VWpm2NOF2Zw
clearly has just had brain surgery, rip Santa

>> No.16136626

>>16136607
>hate is not a christian emotion
NTA but hate is actually a very christian emotion. christfags used to behead and kill anyone they deemed heretics. the crusades were full of rage and vengeful emotion. only in the recent decades christfags restrained their power level because of scrunity from the leftards.

>> No.16136743
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16136743

>>16136024
https://www.jaronlanier.com/zombie.html

>> No.16136745
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16136745

>>16135984
Here's a story about what would have happened if Daniel Dennett did LSD. Dennett never did any psychedelics throughout his entire life.

https://qualiacomputing.com/2020/08/06/that-time-daniel-dennett-took-200-micrograms-of-lsd/


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16135975 No.16135975 [Reply] [Original]

if neoteny is a feminine trait, would that make pedophiles MORE straight than the rest of us?

2 replies omitted. Click Reply to view.
>> No.16136056

>>16135982
but which direction is the causation?

>> No.16136059

>>16136056
I farted
-Farts in your mouf-

>> No.16136067

>>16135982
That has nothing to do with "straightness". It's a matter of opportunity.
Male pedophiles are more likely to be alone with boys than girls.

>> No.16136095

>>16135975
No WTF unless she has multiple degrees you deserve the rope. You sick fucks looking at 17 year olds that have only been fertile for 5 years need to get off my planet.

>> No.16136137

>>16136067
good goy


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16135967 No.16135967 [Reply] [Original]

>stop learning about determinants goy

>> No.16136022

>>16135967
kek. I like his book and it's clear he wanted the arguments to 'look like' what they'd look like in FA (where there is no determinant), but for most of the later big proofs he just uses minimal polynomials, which of course don't generalize either, and which are probably even less intuitive than determinants.


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16135960 No.16135960 [Reply] [Original]

How many ECTS do you have? For me, it's currently at 655. No cap.


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16135948 No.16135948 [Reply] [Original]

Help, I just graduated with a degree in an utterly useless soft science like linguistics because I'm retarded. I have no soft skills. I'm socially inept and very autistic. I have a gf but no friends. Even McDonald's doesn't want me. The one thing I have going for me is that I'm very good at being alone without socialising for long periods of time. I also taught myself Japanese and Chinese without any help from teachers. If I learn iOS dev or web dev or something will I become employable? Please, I feel so worthless. Everyone looks down on me when I tell them my major and my employment status.


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16135940 No.16135940 [Reply] [Original]

What exactly can I expect from combo of Amisulpride and Olanzapine? I didn't had dose for two weeks(haven't got it at pharmacy) and I changed password meanwhile... Now back on dose I almost entered my old password...

What other negative effects may I expect?

>> No.16135953

>>16135940
What do these medicines do for you?

>> No.16135962

>>16135953
They make me hungry and sleepy...


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16135938 No.16135938 [Reply] [Original]

-574 maybe?

>> No.16136033

>as a starting point, at the very least, there is something
imagine living >1000 years after Plato and still dwelling in a cave


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16135905 No.16135905 [Reply] [Original]

I heard hypothesis from what in stone age, actually females were providers for the tribe, while males simply ate all their mear by themself

>> No.16135908

Secret blue.

>> No.16135946

>>16135905
Not possible because women don't have as much testostertone as me and I'm big alpha man and I go to the gym and I'm 6'5" and women are not good as I am

>> No.16135966

>>16135905
Meanwhile women were also pregnant, breastfeeding, child-rearing, making tools, weaving clothes, baking pottery and all the rest of it. Women can do it all. No men needed. Specialization is not an advantage.

>> No.16135970

>>16135966
Girl power, sisters!
moids seething

>> No.16136017

>>16135905
>25% more upper body strength on average
sure bro


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16135901 No.16135901 [Reply] [Original]

>local library held nuclear power debate night last week
>expected maybe 10-20 people to show up
>place was packed with almost 100 people
>95% of them were at least 50 years old, not single person under 30
>two lecturers got down and dirty with hard facts
>nuclear btfo any other power source
>old people didn't care and got mad
you don't want to get poisoned by CO2? stop burning fossil fuels
you want to keep your standard of living? accept nuclear

8 replies omitted. Click Reply to view.
>> No.16136020
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16136020

>>16135901
nuclear power is most support by:
>men
>republicans
>college educated,
>old people
>whites
it was mostly old people at the library because only old people engage in civic democracy outside of george floyd riots.

>> No.16136068

>>16136011
https://www.youtube.com/watch?v=k12teOokSqM

Bring back an actual monarchy, I want to see politicians heads put on spikes.

>> No.16136138

>>16136068
the thing with power is you need an even more psycho to take power away from psychos. and then you have to deal with the even bigger psycho. you can't ever stop this game in human form. that's how humans roll

>> No.16136229

>>16136138
oh ok my mistake let's be powerless then, i love politicians

>> No.16136238

>>16136229
our only real power is slowly going away with AI replacing humans in various jobs.


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16135841 No.16135841 [Reply] [Original]

Ive discovered something incredibly cool in applied physics.

The kicker is, i need a large mass of pure ions, a few moles without any electrons at least.

Anybody know the easiest way to make a dense cold pure ion plasma? I swear to reference you when i publish.

>> No.16135850

Sorry, I can't help you

>> No.16135943

penning traps or laser cooling, but hope you have access to this kind of stuff you ain’t getting one in walmart any time soon.

>> No.16135954

defrenulated ions or regular ions?

>> No.16135961

>>16135954
Regular, completely electron stripped pure ions.

>>16135943
Storage aside, ive got that covered. Any opinion on the best way to seperate electrons and ions for a few brief micro seconds? An electromagnetic pulse of some variety seems like the only option.


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16135812 No.16135812 [Reply] [Original]

Is there a theory of mind/brain physiology that accounts for the notion that, for an internal monologue to exist, the brain must simultaneously employ both a speaking and a listening component?


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16135774 No.16135774 [Reply] [Original]

https://www.youtube.com/watch?v=zHAl1PHcQyU

With the competency crisis and the great filter (any event that prevents a host species from advancing to the galactic age) approaching are you at all worried that we're a lost civilization and our resource allocation from material science to group psychology has been a complete disaster?

Humans don't fear anymore. We've become so comfortable that people like Feynman are a thing of the past. The only hope I have is that we're in some real good possession of dark technology through the military and intelligence apparatus. Perhaps then, billions of years from the universe's infancy there will be humans.

2 replies omitted. Click Reply to view.
>> No.16135801

>>16135774
>the great filter
its name is communism, a mental virus that has managed to pass itself as anything but what it is, a cult, and not only so, but has continued to evolve
https://www.youtube.com/watch?v=YfwMpxhrCYE
https://www.youtube.com/watch?v=cV0XSPbo1CY

>> No.16135867

>>16135801
Sure, incompatible political systems are one of the great filters.

>> No.16135873

>>16135867
true if you mean incompatible with expanding outside our solar system

>> No.16135880

>>16135873
That's all that matters anon. If we don't find a way to leave our planet whenever we choose to, we'll eventually go extinct as a species. Any theory or system that is antithetical to achieving this goal should be abandoned, ridiculed and abolished. String theory first.

>> No.16135892

>>16135789
>By all likelihood aliens don't interact or care about us because we haven't even proven ourselves to be worthy
By all likelihood there aren't any, and we are the first intelligent, multicellular life in the universe.


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16135755 No.16135755 [Reply] [Original]

If a watermill like picrel floats on a river and creates energy by having absorbing the force of the current into its blades does that slow down the flow of the current?
If yes could you apply them to avoid fast flowing rivers washing through their beds?
If no could you put endless amounts of them into any river and have your power output limited only by the length of the river?
By that same thought could you place many dams behind one another as long as the water keeps flowing downhill and magnify the power output?

6 replies omitted. Click Reply to view.
>> No.16136178

>>16135856
yes they do

>> No.16136196
File: 1.16 MB, 882x587, WakeeffectcBelAirAviation-2518361547.png [View same] [iqdb] [saucenao] [google]
16136196

>>16135856
they do create a wake of turbulent air, but as to whether they decreases the power of turbines if they're all in a row "there is significant uncertainty"

>> No.16136363

>>16135755
>>If no could you put endless amounts of them into any river and have your power output limited only by the length of the river?
The energy in a river is limited by the flow rate and vertical drop, not the length. How much water drops how far are the relevant factors.

>> No.16136374

>>16136196
to me it looks like they are messing with the position of water vapor in the air current, but the air itself is not turbulent that way. it can't have such a long stream of fucking turbulent air, it should settle/mix, but water vapor seems to be lifted or something

>> No.16136379

>>16135755
You can either build two dams one at the end of the stream and one in equal distance to the end and the source or you can build one dam at the end of it alone. Physically, it has no effect and you can not extract more energy from building more dams.

The reason that the conservation of energy, which is a consequence of the conservative nature of the gravitational force. If you built two dams, what happen is that you'd lower the kinetic energy of the water and it'd flow more slowly.

>>16135757
This is not a good analogy. Because the rocks are not turbines, which extract the energy from the stream via engines. They're carried along the stream and - due to conservation of momentum - do neither reduce nor increase the energy of the water.