/sci/ - Science & Math

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Double parachute failure, no broken legs

Anonymous Sun 05 Sep 21:05:18 2021 No.13607418 View Reply Original Report

Quoted By: >>13607428 >>13608387

How much snow would you have to sink into to survive a double parachute failure without breaking either of your legs?
Asking for a friend.

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Anonymous Sun 05 Sep 22:25:28 2021 No.13607683 View Reply Original Report

Quoted By: >>13607693 >>13608372

Is carbon the only element with cool allotropes or are there others?

I know ferrite but it's kinda shit

Anonymous

Anonymous Sun 05 Sep 2021 22:28:11 No.13607690 Report

Quoted By:

Phosphorus is cheeki and tin is tin.

Anonymous

Anonymous Sun 05 Sep 2021 22:28:30 No.13607693 Report

Quoted By:

>>13607683
phosphorus

Anonymous

Anonymous Sun 05 Sep 2021 22:40:31 No.13607720 Report

Quoted By:

Chocolate has six allotropes, that's why a bar of hard chocolate is hard and snaps with an audible crack but the same chocolate glazed over a cake is soft like a paste.

Anonymous

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Anonymous Mon 06 Sep 2021 01:05:05 No.13608057 Report

Quoted By:

Anonymous

Anonymous Mon 06 Sep 2021 03:21:27 No.13608372 Report

Quoted By:

>>13607683
>allotrope
Plutonium exhibits six allotropes

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Was Women having long hair a result of

Anonymous Sun 05 Sep 14:59:04 2021 No.13606309 View Reply Original Report

Quoted By: >>13608362 >>13608370

men captivating women(speaking of stoneage probably), force them to grow long hair, so they can easily get hold of em if they try to escape from their rapists? And this then became over millenia somewhat a symbol of sexualization?

I know already I'll get hate for this

But If so then I'd actually understand women kinda who are basing their worldview on that. They don't want to be sexualized that way, and apparently for them to have children and find a suitable partner they'd have to submit to this. Its like women beeing pissed at men brainwashing society and culture into retarded patriarchic Beautystandards. While at the same time beeing forced into it because of indoctrination.

12 posts and 3 images omitted

Anonymous

Anonymous Sun 05 Sep 2021 17:34:15 No.13606684 Report

Quoted By:

>>13606676
ok yea that makes sense.

i no lie i science guy

i no lie i science guy Sun 05 Sep 2021 19:45:40 No.13607137 Report

Quoted By:

>>13606676
me cave man
me like to stoke long hair
me fuck after stroke
Also testosterone inhibits scalp hair growth

Anonymous

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Anonymous Mon 06 Sep 2021 03:14:48 No.13608362 Report

Quoted By: >>13608368

>>13606309
Utterly completely wrong.
Men are practical and like simplicity. Short hair is easier to maintain.
That's all there is to it!
Women will actually bother with shit like makeup and bows and braiding, pleating dresses etc. etc.. Men will be like "why don't I cut it all off then I don't need to worry about it?"
This is why men stereotypical don't give a shit about what color the kitchen or bathroom tiles are.

Anonymous

Anonymous Mon 06 Sep 2021 03:18:12 No.13608368 Report

Quoted By:

>>13608362
women
>these panties have a tear up near the elastic band the size of a eye of a needle, in the trash
men
>the elastic still holds even though there's two quarter piece sized holes, why would you throw out perfectly good undies?
Men are function over form

Anonymous

Anonymous Mon 06 Sep 2021 03:20:52 No.13608370 Report

Quoted By:

>>13606309
It's just a matter of not cutting it. Men also kept long hair in many cultures at some point. It's warm and decorative.

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Anonymous Mon 06 Sep 02:08:10 2021 No.13608230 View Reply Original Report

Quoted By: >>13608257 >>13608266 >>13608298

Is humor subjective?

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Anonymous Mon 06 Sep 01:53:18 2021 No.13608178 View Reply Original Report

Quoted By: >>13608295 >>13608300

What does it mean if I got a result of 112 IQ on the mensa norway test after skipping the last 10 questions (out of 35) I randomly selected them bc adhd

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Anonymous Sun 05 Sep 21:51:14 2021 No.13607575 View Reply Original Report

Quoted By:

Is O- the most valuable and healthy blood?

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How can calculators generate truly random numbers?

Anonymous Sun 05 Sep 12:24:06 2021 No.13605989 View Reply Original Report

Quoted By:

How, physically, do they do that? I wonder because for me electronic machines are purely logical and incapable of creating

Anonymous

Anonymous Sun 05 Sep 2021 12:25:44 No.13605999 Report

Quoted By: >>13606032

It's called pseudorandom for a reason. Otherwise: External sources of entropy.

Anonymous

Anonymous Sun 05 Sep 2021 12:38:15 No.13606032 Report

Quoted By:

>>13605999
Wew ok I went to check a pseudorandom number generator on wiki. It's more complicated than I thought.
https://en.wikipedia.org/wiki/Mersenne_Twister

Anonymous

Anonymous Mon 06 Sep 2021 00:02:19 No.13607935 Report

Quoted By:

As you've discovered they don't. You can actually see it in action if you generate numbers on a multithreaded core depending on the algorithm used. True random number generators are usually hooked up to something that is a physically random process like radioactive decay.

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Anonymous Sun 05 Sep 12:35:55 2021 No.13606025 View Reply Original Report

Quoted By:

What are the dangers of misdiagnosising COVID-19?

4 posts and 1 image omitted

Anonymous

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Anonymous Sun 05 Sep 2021 21:34:57 No.13607523 Report

Quoted By:

Then the box is placed in an extravagant carrier bag with the stores brand printed in large letters so when they're outside in the street knowing other young adults walking equally slowly will see the brand as they parade if while trying to pretend it's no big deal. They walk over to a coffee stand where they all buy a £4.99 Latte because it's the drink all their peers have, the coffee isn't even filtered properly because it as to be served quickly for the fast walking young people with places to be. But that doesn't matter, because the cup is branded with the Costa logo. They stroll around for a while, walking into other shops and looking at more over priced attire, but they don't buy anything because they've already spent all their money, none of the group wants to leave early to reveal this. Eventually head for the exit, they sneer at a man driving away in a 2003 VW Polo because his exhaust had broken, but they didn't think about because his wage for cleaning the bathrooms in the shopping centre was meagre he couldn't afford to fix it yet. But they're contempt they've put the world to rights as they drive off in their leased four by four knowing they're virtuous.

Anonymous

Anonymous Sun 05 Sep 2021 21:38:54 No.13607538 Report

Quoted By: >>13607613

>>13607517
I often forget my small town has one of the most popular outlet malls in the country. How often does a person need a new set of luggage? Since this is a sleepy quiet town, it's weird on the rare occasion I go over there and see the large crowds. It's like being in an urban city center. Glad the town was smart enough to have it built outside of town so we don't have to deal with the traffic and everything else that it generates.

Anonymous

Anonymous Sun 05 Sep 2021 22:00:39 No.13607613 Report

Quoted By:

>>13607538
Wait until some boomer farmer sells off half his land on the edge of your small town to a chinese firm, who then subcontract the land two a building developer who then builds tens of thousands of tiny houses with narrow roads to cram as many houses onto the land, all made with cheap material and probably won't last 100 years.

I'm almost certain theres a hell gate buried under Bicester Village by the way.

Anonymous

Anonymous Sun 05 Sep 2021 23:10:14 No.13607794 Report

Quoted By: >>13607926

>>13607390
Earth is going to be fine bro. It may get hot, but your body does the same thing to fight a flu.

Anonymous

Anonymous Sun 05 Sep 2021 23:58:38 No.13607926 Report

Quoted By:

>>13607794
worst thing I've heard all day

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/sqt/ /qtddtot/ - stupid questions thread

Anonymous Mon 30 Aug 22:15:03 2021 No.13582843 View Reply Last 50 Original Report

Quoted By:

Formerly >>13557017

Arbitrage theory edition.

>what is /sqt/ for?
Questions regarding math and science.
>where do I go for advice?
>>>/sci/scg
>where do I go for other questions and requests?
>>>/wsr/ >>>/g/sqt >>>/diy/sqt etc.
>how do I post math symbols (Latex)?
https://rentry.co/sci-latex-v1
>a plain google search didn't return anything, is there anything else I should try before asking the question here?
https://scholar.google.com/
>where can I look up if the question has already been asked here?
https://archived.moe/sci/
https://boards.fireden.net/sci/
>how do I optimize an image losslessly?
https://trimage.org/
https://pnggauntlet.com/

>where can I get:
>books?
https://spoon.wiki/Books
https://stitz-zeager.com/
https://openstax.org/
>articles?
sci-hub.st
>book recs?
https://sites.google.com/site/scienceandmathguide/
https://4chan-science.fandom.com/wiki//sci/_Wiki
http://math.ucr.edu/home/baez/physics/Administrivia/booklist.html

>carreer advice?
https://sciencecareergeneral.neocities.org/
>help with calculus?
https://spoon.wiki/WolframAlpha
>charts?
https://imgur.com/a/pHfMGwE
https://imgur.com/a/ZZDVNk1
>tables, properties and material selection?
https://www.engineeringtoolbox.com/
http://www.matweb.com/

General advice for asking questions here:
>be likeable
>attach an image (animal images are best. Grab them from >>>/an/)
>avoid replying to yourself
>ask anonymously
>remember to check the Latex with the Tex button on the posting box
>if someone replies to your question with a shitpost, ignore it
>avoid arguing with Yukarifag
>do not tell us you came from whatever the fuck board, /pol/ in particular
>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
>If it ain't english I can't speak it

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Anonymous

Anonymous Sun 05 Sep 2021 21:15:09 No.13607458 Report

Quoted By:

how did they get this here?

Anonymous

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Anonymous Sun 05 Sep 2021 21:18:12 No.13607463 Report

Quoted By: >>13607924

How did they get this?

Anonymous

Anonymous Sun 05 Sep 2021 21:32:44 No.13607514 Report

Quoted By: >>13607533

>>13607301
Thank you a lot anon!

isn't there any other method to solve this?
It's really, really, really a pain
with all these things to do is easy to make mistakes, I can't get that matrix
also, shouldn't the columns of P be the eigenvectors?

These are the eigenvectors I found:

$ v_1 = \begin{bmatrix} \frac{2}{-5-\sqrt{29}} & \\ -1 \end{bmatrix} , v_2 = \begin{bmatrix} \frac{2}{-5+\sqrt{29}}\\ -1 \end{bmatrix} \\ P* = \begin{bmatrix} \frac{2}{-5-\sqrt{29}} & \frac{2}{-5+\sqrt{29}}\\ -1 & -1 \end{bmatrix} = \begin{bmatrix} \frac{5-\sqrt{29}}{2} & \frac{5+\sqrt{29}}{2}\\ -1 & -1 \end{bmatrix} \\ \text{*= not yet scaled} $

So basically now I just have to scale it to unit (so divide them by their norm)
Yeah, since they're eigenvectors of distinct eigenvalues they're orthogonal, so, as you said P^T = P^-1

and then it's just $v * P^-1 * D * P$

Anonymous

Anonymous Sun 05 Sep 2021 21:37:23 No.13607533 Report

Quoted By:

>>13607514
>just v?P?1?D?P
for finding c in ax^2 +by^2 = c

Anonymous

Anonymous Sun 05 Sep 2021 23:58:04 No.13607924 Report

Quoted By:

>>13607463
Get what? All the steps are shown. Have you never seen an integration done by substitution before??

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Are programming and algorithms the same thing?

Anonymous Sun 05 Sep 20:27:25 2021 No.13607281 View Reply Original Report

Quoted By: >>13607619 >>13607657 >>13607903

https://youtu.be/QNznD9hMEh0

in this vid, around minute 19, simon says he was no good at programming but he could come up with algorithms.

if youre good at algorithms, shouldnt you be good at programming as well? I mean, dont you have to know the basic operations of the cpu in order to design algorithms?

3 posts omitted

Anonymous

Anonymous Sun 05 Sep 2021 21:04:45 No.13607417 Report

Quoted By:

the same difference between inventing calculus, and being good at solving integrals

Anonymous

Anonymous Sun 05 Sep 2021 22:02:21 No.13607619 Report

Quoted By: >>13607714

>>13607281
programming generally refers to implementing algorithms on digital computers

Anonymous

Anonymous Sun 05 Sep 2021 22:15:48 No.13607657 Report

Quoted By:

>>13607281
Software engineering has implementing algorithms as its core, but there is so much more shit to it.

All the stuff about testing, usability, modularity, coding practices, version control, design patterns, coordinating large teams etc...
It's not as interesting, but it's what actually makes the difference between good and bad software engineers

El Arcón

El Arcón Sun 05 Sep 2021 22:38:31 No.13607714 Report

Quoted By:

>>13607619
Yes, programs are like larger versions of algorithms.

Anonymous

Anonymous Sun 05 Sep 2021 23:46:08 No.13607903 Report

Quoted By:

>>13607281
>if youre good at algorithms, shouldnt you be good at programming as well?
Yes, programming is the implementation of algorithms.

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Double parachute failure, no broken legs

Was Women having long hair a result of

How can calculators generate truly random numbers?

/sqt/ /qtddtot/ - stupid questions thread

Are programming and algorithms the same thing?