A
Anonymous10/02/25, 11:10No.16803890/sqt/ - simple questions thread (aka /qtddtot/)
Previous thread: >>16759536
>what is /sqt/ for?
Basic questions regarding maths and science. Also homework.
>where do I go for advice?
>>>/sci/scg [//boards.4chan.org/sci/catalog#s=scg] or >>>/adv/ [//boards.4chan.org/adv/]
>where do I go for other questions and requests?
>>>/wsr/ [//boards.4chan.org/wsr/] >>>/g/sqt [//boards.4chan.org/g/catalog#s=sqt] >>>/diy/sqt [//boards.4chan.org/diy/catalog#s=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?
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:
>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
130
Replies
A
Anon10/02/25, 17:46No.16804227
What is the side length of the smallest possible regular pentagon which has three non-overlapping unit squares inside it?In picrel there's an approximation but what is that number exactly?
A
Anon10/03/25, 03:18No.16804633
asd
A
Anon10/03/25, 05:31No.16804677
Guys, what do you think the easiest way to kill yourself is ;-;
A
Anon10/03/25, 17:44No.16805319
My previous glasses were pretty fine at the time, my current ones kind of skew/blur vision pretty aggressively anywhere outside the center, but I did let them use some process to have thinner lenses as not to make them much thicker than the previous ones.Is my problem related to these thinner lenses/if I were to just say fuck it and go with hueg lenses for my next ones would I be fine?
A
Anon10/03/25, 19:41No.16805426
The generalized bug problem. How do you solve it?>you have a 3D block whose dimensions are A*B*C which can be any numbers unlike in picrelated where they're A=1, B=1 and C=2
>bug starts at one of the vertices
>you choose a point anywhere on the surface of the block
>the bug takes the shortest possible route to that point
>you always choose the point such that it forces the bug to walk the longest possible distance
>what is that distance in terms of the variables A, B and C?
A
Anon10/04/25, 14:19No.16805996
I've been dabbling in enviro science recently, mainly in topics pertaining to oil depletion etc. From what I understand, the conventional oil production and the public discourse on natural resources reached their climax in mid 2000s before GFC, but then they magically vanished for some reason. Does any anon know why?
I know there has been a shale revolution in US and thanks to technology improvements we kicked the can down the road a bit further, but obviously a finite resource that is constantly being extracted has to end at some point (or rather become unaffordable for further extraction due to declining EROEI). The idea itself that finite resources will end one day is quite universal and rather uncontroversial, so where did this conversation go?
A
Anon10/04/25, 14:59No.16806018
Does the powerful magnetic field inside and MRI machine affect the chemistry of the human body? Since the machine also pulses electric fields to manipulate hydrogen atoms does it also affect electrons in ionic and covalent bonds changing chemical properties?
A
Anon10/04/25, 16:30No.16806078
Could a star be orbiting a black hole and then a habitable planet orbiting that star?
A
Anon10/05/25, 21:32No.16807222
can high fluid reasoning overcome poor working memory and memory recall?
A
Anon10/05/25, 23:09No.16807303
Circuit theory class is such bullshit. I hate dependent source superposition problems
A
Anon10/06/25, 08:27No.16807572
Having trouble with this question and would appreciate help. It's the type of question that doesn't directly appear in the text or lectures.
A
Anon10/06/25, 09:37No.16807602
chemistry question, the notes say "is refluxed under azeotropic distillation conditions until the evolution of water stops". im going to be using a dean stark apparatus so the azeotropic part is no problem, but what does it mean by the evolution of water? is it a typo and was supposed to be distillation? there shouldnt be anything in there that boils at under 100c so i cant see why i would stop then (because nothing would have happened), but maybe water is made in the reaction and im reading it wrong
i might be overthinking it but can anyone put me straight?
A
Anon10/06/25, 21:01No.16808153
I can't tell if this bullshit is a schizo or a bot posting?
A
Anon10/07/25, 01:32No.16808350
Can someone help me understand why 1.2.5 is true? I understand when i=j it would be equal to 1, but don't understand why i j unequal would made it to zero to be a kronecker Delta(which is also a suspicious way of saying identity matrix.
The book is theoretical elasticity and Im beaten 5 pg in. PDF in the immediate response.
A
Anon10/08/25, 17:22No.16809652
To make the leaning tower of lire lean over the edge of the table by N brick lengths, the minimum number of bricks you need is supposedly round(e^(2*N-y)), where 'y' is Euler-Mascheroni constant. How do you prove this?
A
Anon10/09/25, 03:41No.16810085
>be me
>sitting about, thinking of restaurant menus
>take a noun and an adjective
>a word with the adjective on the left of the noun is seen as inherently less fancy than that with the same adjective on the right
>e.g. foster bananas vs bananas foster
>also see: french cuisine
>and i was thinking, is there some (obv noncomm) algebraic structure A where xA < Ax for all x in some set?
A
Anon10/09/25, 22:45No.16810888
I'm going through a university physics book. I spend about 0.5-1 hour every day on it. I'd like to get through the first two parts: part 1: mechanics and part 2: oscillation, waves, and fluids in the next 100 hundred days. Would you say I'm going through it fast enough? I'm on page 40 out of about 290. But I'm not being really disciplined. I stop when I get a little tired, I just make sure I do a bit every day.
So I guess my question is if 100 days is enough to learn these two parts if you do a bit every day but no more than an hour.
A
Anon10/11/25, 21:13No.16812412
Why is Multivariable Analysis so fucking hard? There are so many obtuse theorems that are so fucking hard to understand compared to Real Analysis. I need to read and reread a theorem for hours until I'm able to start understanding it somewhat. I've never had this issue with any other area of mathematics.
A
Anon10/11/25, 22:56No.16812512
I'm getting 23.1569 out of (gx)/(v_0*_v0). So what am I doing wrong?
A
Anon10/12/25, 13:18No.16812903
How do you prove that this integral is equal to this series?
A
Anon10/12/25, 20:49No.16813266
I wanna research gravity/black holes, what is the best country in the EU for that?
A
Anon10/13/25, 05:27No.16813622
>there is a field called the inflation field that flies through space, generating an infinite amount of universes
>the universes are born, they live, and then they die
>the inflation field then eventually creates a new universe in their place
if space is infinite and has always existed, then why do they say that time hasnt always existed? is inflation theory really our current best idea about the universe?
A
Anon10/13/25, 20:28No.16814294
Anydice tells me that the middle of 3 ten sided dice has a 21.6% chance of being 3 or less. Same chance it has of being 8 or more. Which I understand no issue and AnyDice agrees.
Going by that understanding say it should have 43.2% of being either
But then AnyDice goes and tells me that this same middle of 3d10 has ~38.5% chance of being either.I need a less retarded anon to explain to me what I'm too smooth to see
A
Anon10/14/25, 03:34No.16815700
hey if i want to consider teaching myself some fundamentals (like say i would follow some basic biology 101 curriculum) what would you recommend the best way to go about it? download some lectures online, maybe look up semester syllabi from some big name schools, see if there's some free example tests somewhere, that sorta thing? it's been a long time since i used it but how about shit like coursera just for a 'free class' already madei want to teach myself maths from the ground up too but i imagine that would involve a whole lot of note-taking and many practice tests
A
Anon10/14/25, 04:01No.16815724
I think I’ll have to learn the Julia language in order to implement and test a certain genetic algorithm I’m working on. Do any of you have experience with it? I just want to know how steep the learning curve is and what subtleties I should be aware of.
A
Anon10/14/25, 18:18No.16816313
Anyone here know of something befitting: >>>/wsr/1540306 [//boards.4chan.org/wsr/thread/1540306#p1540306] ?
A
Anon10/15/25, 05:05No.16816932
Does anyone know how much longer a black person can stay under the sun before they get a sunburn compared to a white person? I cant find any numbers on it and i know there are ethical problems with waiting till people burn but surely someone was curious enough to test this when the rules were more lax
A
Anon10/15/25, 22:15No.16817651
Why do schedule 1 drugs exist if they don't have any medical or chemical use?
A
Anon10/17/25, 02:24No.16818960
What's a simple way to quantify how uniform a distribution is?
For example if I have 20 dollars distributed amongst 5 wallets in [8 3 1 1 6] and 20 dollars distributed among another 5 wallets in [3 4 5 5 3]. What would be a good way of quantifying that? Doesn't need to be anything very complex.
A
Anon10/17/25, 08:53No.16819083
Whats it like to be smart? Im really jealous of smart people and how their brains work, how easy it is for them to come up with ideas and create things. It's like watching magic
A
Anon10/17/25, 13:55No.16819247
Does anyone here have some intermediate knowledge on metaanalysis? I want to find a book that talks about fixed effect meta analysis, but where there is still some differnce between different study populations, but they can be estimated using bmi, age, percentage of men etc, so kind of like random effects metaanalysis but not really
A
Anon10/17/25, 18:51No.16819397
Can I just say that [math]f^{-1}(B_\epsilon(f(x))) = B_\epsilon(x)[/math] so that it's an open ball contained in [math]f^{-1}(V)[/math]?
A
Anon10/18/25, 02:18No.16819735
What if you take pi in base-2 and then treat that number as though it was base-10? So you would take the number 11.0010010000111111011... and decide that that's a base-10 number now.What do we know about this new number, is there a mathematical formula for it like there is for the normal pi?
A
Anon10/18/25, 10:57No.16819901
i'm going to see a solar eclipse in august next year, it will be a very uncommon opportunity and i want to make the most out of it. i'm planning on watching it from a very high mountaini hear i need special glasses for protection, are the cheap ones sold at aliexpress ok?anything else i should look out for or prepare?
A
Anon10/19/25, 18:11No.16820896
with public-private key cryptography would it be mathematically possible to have additional keys which decrypt some mapping instead of the actual data?
A
Anon10/19/25, 20:02No.16821025
Why is this book recommended in the sticky? Nobody uses this notation.Young and Freedman - University Physics with Modern Physics
A
Anon10/19/25, 21:35No.16821145
I have a question but it's not really simple, it's about a weird graduate admissions situation. /adv/ doesn't seem to be responding. Is this the right board to post it?
A
Anon10/20/25, 05:22No.16821443
The midterms ended and the math general died. How dare you dumb fucks. Why is hitler quarter e1b african jew through a jew grandma and mystery afrojew giving adolf the wide african nose?
