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# Catalog (/sci/)

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Welcome to /sci/. If you're here for homework help go to >>>/hwk/. If you're here for religion or politics, fuck off.

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How to cook cyanide?

>CYANIDE

>Cyanide is the granddaddy of synthetic poisons. Easily made from common chemicals, cyanideis used as is for poisoning bullets and food, and is used in the making of Hydrogen Cyanide,Cyanogen Chloride, Tabun, and numerous other poison gases.A dose as small as 50 milligrams (ingested) can kill an adult man. Of course, the more thebetter.To make cyanide, you must first make ferrocyanide. This can either be made, or preferably,bought.

>Ferrocyanide Preparation

>Ferrocyanide is obtained by heating 10 parts (by weight) potassium (or sodium) carbonate; 10parts coke. cinders, or coal; and 3 parts iron turnings, all in coarse powder. to a full red heat inan open crucible, stirring occasionally until small jets of purple flame arc no longer seen. Whencool, the soluble matter is dissolved out of it, the solution filtered, evaporated, and crystallized.The crystals obtained are redissolved in hot water and cooled very slowly, forming large yellowcrystals of the ferrocyanide.In order to obtain a pure form, melt dried ferrocyanide in a glass vessel and let cool, dissolvethe fused mass in water, neutralize any excess of alkali with acetic acid (vinegar), andprecipitate the salt by adding strong alcohol to the solution. Wash the precipitate with a littleweak alcohol, redissolve it in water, and crystallize.Sodium Ferrocyanide (Na4Fe(CN)6-10H2O, FW 484.07, mp 82C, CAS# 13601-19-9, AKAYellow Prussiate of Soda) can be ordered quite cheaply fromwww.sciencealliance.com.Catalog #s and prices are: C7435-100 100g $4.12, C7435-500 500g$8.96. And there's nohazardous shipping fees for it either. Cyanide costs about $47 a pound plus$15 hazardous.

>Cyanide Preparation

>To convert the ferro to cyanide do this (please note that these instructions were for thepotassium not sodium salt. I'm assuming that the ratios are similar for both); Mix thoroughly 8parts of dry sodium ferrocyanide and 3 parts dry sodium carbonate (pool pH adjuster), heatthem in a steel container (cleaned oil filter can works nicely), with constant stirring (use clotheshanger, straightened out), with a propane torch or other intense heat source till it melts into aclear liquid. Heating is continued until the mix no longer fizzes and the fluid portion is colorless.After a few minutes rest, to allow the contents to settle, the clear portion is poured from theheavy black sediment (iron) at the bottom at the bottom of the crucible and onto to a clean slabor steel bowl. It's then broken up while still warm and stored in airtight bottles.

>This will be almost pure cyanide.

This is the only recipe i was able to find, could this work, frens?

If not, any alternatives?

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is space colonization a meme? will human realistically ever be a multi-planetary species?

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RSA without factoring

MQ mod M converges to CP mod M.

If we use exact M and we have C and P and M we can use floor division to reduce Q. Discuss. Is it possible?

It seems like way to crack RSA with just PubKey and it means having whole TLS down.

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PROTECT YOURSELF FROM SHILLS

Since it looks like a bunch of kikes came here, mods are asleep and new fags don't know how to deal with it I'll make a thread about it.

What is a shill you may ask?

a shill is a paid jew or pajeet to shit up a board in order to change its view on politic or to hoide important threads.

How to spot shills, then?

Easy method,file name is written in this way "XXX-XXX-XXX-XXX.file".

usually slide threads are effortless posts with either stupid question or pornography(e.g."this cartoon caractere should be a nudist",a Roseli nude,tranny porn).

What should I do then then?

Ignore and filter those threads.==DO NO BUMP SHILL THREADS== they ll evenually die out if you ignore them.

If anons bite the bait,write a sage with he no bump option.

copy and paste this thread for hard shilling time

oh and btwthe goyims are awaking and he rope is waiting for you

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sounds mathematical ?

sounds that were created using mathematical formulas affect a person ?

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Europe. Every fucking year

3 months of heat like that every year and you will be willing to live in Alaska/Scandinavia/Scotland :(

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Does transmitting more data through waves require more energy?

Does transmitting more data through waves require more energy? If a phone receives 1TB instead of 1 KB, will it receive more energy/heat?

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I was just watching some stuff on superpermutations and remembered this stupid chart that I cant for the life of me remember what its called or how it works, but now its bugging the hell out of me and Im hoping someone else knows.

Pic related, Its what I can remember it looking like.

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Prove you're not a LARPer

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Riemann hypothesis

I disproved the Riemann hypothesis.

Fuck me though, apparently.

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Second hand antibiotics

Can I use milk as a hit-or-miss antibiotic? Since they give cows tons of antibiotics and some of it gets into the milk

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What would happen if a house (wooden, conventional construction) were teleported into a vacuum, but it still had atmosphere inside it? Theoretically, of course. Would all the air rush out of the windows/holes very loudly and just throw stuff around a bit due to the wind or would there be structural damage due to the pressure difference?

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Equipment Question

What equipment do I need to properly examine water molecules on this level?

Is it expensive?

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Political Correctness in Science and Academy

The enforcement of political correctness and censorship is also present in science and academia, even more than in the popular fields of politics. Scientific discoveries that threaten the rule of plutocracy that could empower the population are routinely suppressed and exorcised.

All true, but politically incorrect scientific discoveries pass through five stages:

First, they are ignored.

Second, they are ridiculed.

Third, they are debunked with false arguments, buried, and violently opposed.

Fourth, they are plagiarised and stolen by authority bullies.

Fifth, they are accepted as being self-evident, attributed to a plagiarist.

- not Schopenhauer.

Inconsistencies in EM Theory -

the Kelvin Polarization Force Density Contradiction

vixra.org/pdf/1810.0468v2.pdf

After 15 years we are still in the first phase!

Far and wide,

Up and down

Left and right!

If do,

Humanity will be

Indebted to you.

:-))

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An invitation to /robowaifu/.

We're low on people actually willing to help in our endeavors, and we have a ton of research. We're going to need some help and some board partnerships if we're going to automate the vaginal jew.

>>>/robowaifu/

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totally not fbi

has anyone here ever successfully created an atomic weapon?

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Increasing mental ability

has anyone tried/ have any idea if these things work?

https://www.iqmindware.com/brain-training-apps

https://www.brainhq.com/why-brainhq/brain-training-your-way/brainhq-courses

any other resources I should look into?

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why would any female organism want kids if childbirth is so painful?

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Is STEM even a marketable option in \$current_year?

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Cananons still in university

Who here from Eastern Canada, doing their undergrad in a RESPECTABLE (note: respectable) STEM degree, wants to team up on something cross-university for credit on a paper publish + projects accomplished for dat dere resume + portfolio.

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What would you choose?

Wanna be a self thought fella, and I love two subjects math and cs, I'm more leaned toward the mathematics part of cs, like algorithms, optimization, AI, and data science,So should I go cs with the online open source cs degree (in github) or should I start math and then change to cs when I have enough knowledge?

Ps:I'm economically fucked up and living with parents take it into account.

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Resources and books for astrophysics

I'm looking for ebooks (academic or similar) for astrophysics and high energy, particles, cosmology and relate areas.

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Universal heat death? Could it be escaped or even cirvcumvented?

So I watched videos about the universe's death and shit, and now I'm depressed. However, I remembered that article about the 'cold spot' being proof of other universes, so it got me thinking:

Could it be possible that universes could rejuvenate each other by constantly colliding with eachother?

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How is Lorentz Ether Theory wrong?

The Michelson Morley experiment failed to prove the existance of ether wind having any significant speed changes to light, which led to the conclusion that there is no ether wind. Why does it matter that the ether changes the speed to have a velocity shift of v+-c? Was there an actual experiment that proved stationary ether did not exist?

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What are some good jobs that will not be taken by AI in mathematics?

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>For decades now, I have been haunted by the grainy, black-and-white x-ray of a human skull. It is alive but empty, with a cavernous fluid-filled space where the brain should be. A thin layer of brain tissue lines that cavity like an amniotic sac. The image hails from a 1980 review article in Science: Roger Lewin, the author, reports that the patient in question had “virtually no brain”. But that’s not what scared me; hydrocephalus is nothing new, and it takes more to creep out this ex-biologist than a picture of Ventricles Gone Wild.

>What scared me was the fact that this virtually brain-free patient had an IQ of 126. He had a first-class honors degree in mathematics. He presented normally along all social and cognitive axes. He didn’t even realize there was anything wrong with him until he went to the doctor for some unrelated malady, only to be referred to a specialist because his head seemed a bit too large.

>It happens occasionally. Someone grows up to become a construction worker or a schoolteacher, before learning that they should have been a rutabaga instead. Lewin’s paper reports that one out of ten hydrocephalus cases are so extreme that cerebrospinal fluid fills 95% of the cranium. Anyone whose brain fits into the remaining 5% should be nothing short of vegetative; yet apparently, fully half have IQs over 100. (Why, here’s another example from 2007; and yet another.) Let’s call them VNBs, or “Virtual No-Brainers”.

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What is your favorite proof for God?

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Horizon line elevation?

Is it true the horizon line elevation becomes lower as you approach the Equator?

And it rises up as you approach one of the poles?

What would explain this phenomenon? Latitudes, perhaps?

How can I calculate the elevation in a picture? Is it possible to detect the latitude in a picture, calculating the elevation in a clear horizon line?

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Why are women surprisingly able in Math? In all the other STEM and intellectual subjects, the disparity between male and female ability is significantly greater.

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What is the best possible approach to philosophy and metaphysics?

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A Balm Capable of Healing Wounds Rapidly

My 2x great grandfather obtained a balm from an indian that was capable of doing exactly that, my grandfather said he used it and it did indeed work. He had a deep laceration that was able to heal overnight so completely there was no evidence there had ever been an injury.

My question is: Why isn't this commercially available and what is it about this balm that makes it so effective?

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Heatgun Science Challenge

Vented Egg Longevity. World's Record. (Well, for something that's never been done before, so …. ) Looking for improvements on how to lengthen the life of the drilled egg.

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HIV question

Let's say there's a line of men fucking each other in the ass. The one in the very back (the only one that is not getting fucked in the ass) has HIV. How long until the guy in the front gets HIV, if they continue fucking like this for 600 thrusts an hour?

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Motivation thread (for other peoples sake, the fire inside me rages red like an ember)

High school dropout here, going to change my major to physics. Was about to drop out of college but realized I will always be a failure to myself unless I spite everyone who could ever outdo me…

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Top 10 Lab Fails

A contest my company was running for the best (worst?) lab fails:

https://blog.labtag.com/labtags-top-10-lab-fails

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Hello. I used work at the Fukushima Daiichi Nuclear Power plant during the day of March 11th 2011. Ask me anything. I do not have much time to live.

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Space travel books

Do you guys know of any books on space travel/planetary colonization?

Thanks.

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We are forced to use color to represent light we cannot see

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So get this. I look into the vaccine debate extensively. I look at all sides and I notice how all the anti-vaxxers are conspiracy theorists from conspiracy website circlejerks. I come to have faith in my country’s public health organization and all other countrie’s public health organizations and of course, my public schools, because the whole world’s public health orgs and schools teach the same thing in regards to the safety and effectiveness of vaccines… So I think I’m ready, and I can debate anyone with confidence.

Then a friend of my close friend says his cousin got some sort of trauma that resulted in a speech impediment, and all credible resources diagnosed it as a vaccine related injury…

My close friend informs me that this is proof vaccines are bad, and that I need to not be so gullible and do better research.

Doesn’t help that I’m fat and autistic and that anti vaxxer friend is in shape and never gets sick despite being a chain smoker.

Which brings us to today’s topic. What is the fine line between being educated and brainwashed? Has anyone else had an instance where reality seems to contradict what is taught in schools? Sometimes research and “educating” myself and others just makes me feel like the ignorant one. I feel useless no matter what I look into and what stance I try to uphold.

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>Friction is a non conservative force

>Friction arises from electromagnetic forces acting on atoms between two surfaces with relative motion between each other

>Electromagnetic forces are conservative

>MFW

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Black Holes and "Alt-Science"

Source is "The Restoration Part 3" from The Unarius Academy of Science, a religious group

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/r/equest

Does anyone have that maths iceberg-tiers image, where the 'normal' part has things like advanced calculus and the 'degenerate' part has things like interrupting lectures whenever a non-real value is used and saying 'assuming the basic axioms' after every single statement

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Differences between CO, H2S and HCN poisoning

CO, H2S and HCN - all of these poisons induce hypoxia. But only HCN poisoning can cause feel of suffocation and gasping for air. Why?

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Proofs

Is "How to Prove It, an Analytical Approach" really useful for learning proofs? Is there a better text out there?

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how would I turn benzaldehyde into 3,4,5-trimethoxybenzaldehyde

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Tidal Locking & Dark Side of the Moon

So, … the Chinese landed a rover on the 'Dark' side of the Moon.

They claim the Moon rotates just once for each rotation around the sun. They say it is explained by the phenomenon of 'tidal locking.' If tidal locking is a thing, why is the Earth not tidally locked to the Sun?! Earth spins ~ 12 times each rotation around the Sun.

Any legitimate explanation for this? I have been looking but it seems physicists are busy with other stuff. (I am just a Chemist and Engineer - I don't get it)

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An invitation to the evolutionist movement.

This movement is dedicated to the transhumanist cause. We support genetic engineering cybernetic augmentations self mental/physical improvement and anything else that will further science and the betterment of the human species as well as its successors.

We mainly support a technocracy but we welcome any other political and economic ideologies/worldviews that can possibly further help us achieve our goals.

If you think your political and/or economic ideology/worldview can help us then i encourage you to join.

https://www.reddit.com/r/Enhanceism/

https://discord.gg/cHgSfe

https://8ch.net/evo/index.html

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Can you solve this?

I have n number of marbles and n ≤ 100. If I group the marbles into some groups of three, I will have

2 marbles left that belong to no group. If I group the marbles into groups of five, I have no marbles

left. But when I group them into groups of seven, I will have 4 marbles left. How many marbles that I

actually have? In other words, determine the value of n

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The Feynman Lectures on Physics

hey /sci/ (i was going to post at /freedu/, but no tor posting), i am reading The Feynman Lectures on Physics, Lecture 5: Time and Distance, introduces the idea of periodicity by giving the example of consecutive noons, saying that recurrence of an event does not imply equiperiodicity of each pair of adjacent occurences. this i agree with, but it then goes to say that, somehow, when there is another recurring event that always happens the same multitude of times between adjacent occurrences of the first event, there is a greater probability that the first event has equiperiodicity of the time between each adjacent pair of occurrences. i am not convinced this is the case, and the authors don't show us this. my doubt is because the second recurring event could, while still happening the same number of times between each pair of adjacent occurrences of the first, not have that equiperiodicity, and thus there might be one day where they are x,y,z,, and another day when they are a,b,c,, where the \sum{x,y,z,,} \neq \sum{a,b,c,,}, therefore the period of the first pair of adjacent occurrences of the first event is not equal to the period of the second pair of adjacent occurrences of the first event. maybe there is some strange law of probability i'm missing? maybe The Feynman Lectures on Physics, Lecture 6: Probability, will make it clear why, i'll let you know if i get anywhere on it. what bugs me is that it feels true. it's compelling to believe, but reason seems to contradict this "common sense", but how can i discount my "common sense"? i can't, that's how. anyway..

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When you run current through a transformer, and that transformer's secondary coil's circuit is closed and carries a load then the primrary coil carries a load also, so all is good. But when the secondary coil is open, what's stopping the primrary from pulling an unhindered current and frying the system/tripping a fuze just like a short circuit?

Similarly, if I had a motor as the sole load on a circuit, and I locked said motor, would that fry the circuit?

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Zero to the power of zero

Does 0^0 = 1?

Make your case, why or why not. If not, what should it be defined as?

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Riemann Hypothesis

As a corollary in this paper, one finds a remarkable disproof of the Riemann Hypothesis.

>Real Numbers in the Neighborhood of Infinity

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Ive used khanacademy my entire life however I would prefer a more text based version. Khan academy is mindnumbingly slow. Got any suggestions?

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Math refresh

Dudes, I need to refresh HS math during the next month before taking LA and Calc I.

Should I stick with gelfand books, basic mathematics, or expii? Khan Academy isn't for me.

thanks

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Quantum Mechanics tutoring

Is this beautiful trap really going to teach me about Quantum Physics? Or is it a scam?

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Anons, whats the easiest way to determine what sub-field I want to go into? I'm doing physics and don't know what direction I want to go. Quantum seems too pop-sci but classical mechanics doesn't seem to have a lot of job openings. I heard high-energy physics is good, but I wanna hear your opinions on either finding a field or just on this subject.

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What are some good trackers for academic software?

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coin flip || possible patterns of equal distribution

so, for a true random coin flip the possible outcome of patterns is 2^n coin flips.

but what happens if i hard code an even distribution of heads and tails?

for a reasonable small n i can calculate it by hand.

e.g. n=2 coin flips:

either HT or TH compared to the true random TT, TH, HT, HH.

i've cut the possible outcomes by exactly half.

for n=4 coin flips:

HHTT, HTHT, HTTH, THTH, THHT, TTHH

6 out of the 2^4 possible outcomes. the amount of possible outcomes compared to true randomness keeps shrinking the more i increase n.

i'm pretty sure this is trivial for most, but i couldn't find the formula for n coin flips. i've calculated (ok, ok, i counted) a bit higher n's on paper via binary trees. tryed to look up a formula, but couldn't find one – prolly just missing the right wording for the question.

can someone help? (and maybe explain, not just give answer)

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I hope this isn't taken as profane by the scientists around here, so I have been watching this show and the interesting thing about its premise has been how most powers seem to come with a certain amount of drawbacks, of course there are a lot of those which completely break the rules but some others may seem OK.

So… let's say there are a few ideas for powers that I would like to write about or explore for whatever reason, I would like some real basis for them, this still can sound overpowered for all intents and purposes but let's try it.

What if there was this character whose power basically meant: This guy is a human particle accelerator/collider? what kind of things come to mind with such a premise other than to ask me to kill myself?

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shitposting curriculum

what do you think of pic related

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Organic chemistry is useful to cook methamphetamine.

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is there enough room in our solar system for a second star? the unique radiation might cause some interesting effects. maybe such a device planted in deep space could also create something like this.

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Intelligence

Can we have a thread that discusses what exactly intelligence is and how it is measured? Most of the discussion I see here about intelligence is centered around group difference in IQ, and sometimes the heritability of IQ and the effects of IQ. But sometimes I have a feeling that many of the papers mean less to me when I don't have a good enough understanding of what exactly intelligence is in general. So I just want a thread discussing questions such as: (this is gonna be a long list by the way).

>what is intelligence? What is IQ? Is IQ the same as intelligence?

>what is the difference between intelligence and personality?

>What is g-factor, and how is it different from IQ and intelligence?

>what are the different theories of intelligence, and which ones are more accepted by academia?

>what is EQ and is it important? I see most people shit on EQ, but I still see a lot of papers mentioning EQ when I look for IQ on google scholar

>Where can I get a better understanding of psychometrics?

>What is the current state of research in IQ? Which subjects are they focusing on? Any new theories or old ideas being phased out? General consensus?

>How accurate are certain IQ tests? What external factors could influence test results?

>What the fuck is factor analysis? How is it calculated and what do the values mean?

>What is heritability and what is its significance?

I know that it does not mean that X% of your IQ comes from your genes when IQ is X% heritable, but rather that 50% of the variance in IQ in the general population comes from genetics. But I'm not sure about its significance since for one thing, the environment could change or be different in different parts of the world, thus having a different effect. How does epigenetics play into this? What's a more intuitive understanding of heritability of IQ?

Basically anything that helps people understand what they're looking at when reading and IQ study, things that give people a broader understanding of IQ, etc. If I find some information or think I can explain something I'll post it, but since I'm not knowledgeable enough in the field of psychometrics or intelligence I can't vouch for its accuracy.

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Challenge

sqrt(ab) = sqrt(a)sqrt(b)

sqrt(a + b) ≈ ?

Find the most elegant, useful, and accurate simplifications.

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Time to start this board again.

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¿Does anyone here speak category theory?

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Reference Frame

Let's assume, light is travelling at c.

Traveling means changing coordinates.

Where do we measure that time in which distance between coordinates is changed?

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Epistemology of Mathmatics

Thoughts?

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http://paperkast.com/ - new link-aggregator exclusively for papers, thought /sci/ might be interested in this