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/sci/ - Science, Technology, Engineering, and Mathematics

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New Textbook/Book Request Thread deadbabies ## Mod ## 13/08/25(Sun)06:03 No. 15270 ID: f34135 [Reply] Stickied

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First off, hello there, I'm deadbabies, and I will be taking over as /sci/ moderator. Rules will remain the same. Please use the report function if you see posts that violate the rules, but also do not abuse it.

I have officially expanded the scope of /sci/ a bit. You may discuss Science, Technology, Engineering, and Mathematics here now. No science is discriminated against as long as it's of the peer-reviewed variety. If someone wants to discuss Anthropology or Social Science, by all means, let them. If you do not like it, just don't post in the thread.

The IRC channel #/sci/ is now (finally) re-registered and I am running as operator on here. Feel free to stop by and say hi. I do leave my computer idling on IRC, so check back or leave me a message if you have any ideas, suggestions, or just want to tell me off. You can get onto #/sci/ by joining the server irc.7chan.org at port 6667. You can also use SSL at port 6697 but you will have to set your client to accept invalid certificates.

ADDITIONALLY and IMPORTANTLY I have had several requests on IRC regarding the old Ebook FTP that we used to have. Unfortunately, the mod who ran it entered the military and no longer runs or maintains it. I have no plans to make another one, but if one of you guys would like to, by all means advertise here.

That being said, I'm just going to leave this link here:


You may find what you seek here.

I will be unstickying the old ebook/source articles thread. Please post any new ebooks/source articles here, and feel free to post any working links from the old thread there; I will eventually be deleting it.
Message too long. Click here to view the full text.

15 posts and 3 images omitted. Click Reply to view.
Anonymous 18/12/26(Wed)20:02 No. 16733 ID: b8bfb2

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Slow, but working:

(You should stop using Google when you search stuff like this!)

Samsung S7 fix please europe 19/03/19(Tue)08:30 No. 16761 ID: 59818e [Reply]

Youtube  I have a samsung s7 which died a while ago after some android update can anyone guide me on how to fix it?

Sci-fi 20/Traveller 20 rule book PDF Anonymous 15/10/04(Sun)23:42 No. 16212 ID: 592535 [Reply]

Youtube  Me and a couple friends are looking for the PDF collections of Sci-Fi 20 and Traveller 20 roleplaying games.

Could anybody lend us a hand?

Chemistry Anonymous 18/10/22(Mon)12:42 No. 16713 ID: eb4831 [Reply]

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Alright, so some dude is trying to determine the atomic mass of 3g Tellur and ends up with 3,475 TeO2. How big is the relative atomic mass of Tellur (atom. mass of O = 16)

Anonymous 18/11/25(Sun)08:56 No. 16730 ID: d40656

> 3,475 TeO2
3475 g? mol? molocules? Need a unit to solve

silver fulminate Anonymous 18/10/13(Sat)03:31 No. 16705 ID: 418128 [Reply]

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It is not called a "high explosive" for nothing. I Saw a video on YT of a guy gripping a chunk and throwing it.. I was not so lucky. Mine just blew up on my desk from the slightest friction!

Anonymous 18/10/13(Sat)03:45 No. 16706 ID: b5377a

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You should blow up a police station.

Anonymous 19/03/04(Mon)17:22 No. 16755 ID: bafe83

it is interesting for me too

Anonymous 19/03/04(Mon)17:24 No. 16756 ID: bafe83

You can use silver fulminate for your laboratory research. But now more popular became using nanomaterials in science. For example, graphene, fullerenes now use in electronic, chemistry and other fields of industry. For example, many of them you can find on http://mstnano.com/

Starting Math Major soon, how to approach? RedRobin9688 18/07/14(Sat)11:25 No. 16675 ID: 241c58 [Reply]

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I move in 8/5/18 and intend to Major in Mathematics, there are four options (Pure, Applied, Applied Stats, Actuarial) which should I formally choose to actually succeed? Should I double major? and if so what in? I'd appreciate the help, I don't want to move in with the parents after school.

2 posts omitted. Click Reply to view.
Anonymous 18/09/28(Fri)21:03 No. 16697 ID: 4f487e

Acturials are the end boss of accountants.

Anonymous 18/10/22(Mon)09:24 No. 16711 ID: 848b2c

Actuarial are accountants for companies, rather than for individuals. They deal with statistics, mostly, to determine what might happen with a given set of starting variables. Most visibly, actuarial tables are what these people produce for life insurance companies, so they can guess at what age you're likely to die (based on sex, height/weight, blood tests, diet, lifestyle, and increasingly: genes) and adjust your rate accordingly so that they are most likely to profit.

Anonymous 19/03/02(Sat)06:44 No. 16754 ID: 13825c

Applied if you want to work on real world problems.
Pure if you want to work on problems we couldn't possible test or might not happen in reality.
Applied Stats if you hate life and are boring.
Actuarial if you don't mind having no soul for a lot of money.

Overrated robot threat Anonymous 17/12/01(Fri)00:40 No. 16587 ID: e4210a [Reply]

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So I've read the n:th alarmist article about how robots will replace some 800 M people before 2030 and so fucking on. It will be an endless summer citizen's wage afternoon until the AI exterminates us and so fucking on.

Tell you why this is not going to happen?

10 posts and 1 image omitted. Click Reply to view.
Anonymous 19/03/01(Fri)07:58 No. 16751 ID: 3cc2ab

Labor prohibit that children do menial work because of the "scarcity" of the parts. We need to deny the workload a slave of faction and re-allow ourselves to think beyond making a mean for a simpler job when we were hired to do a more complicated one. That we get good at our jobs is not an issue we can transcend to the machine we have to teach to take it but it also doesn't mean we owe each other the lift of that job as like something to do for the good of it. Take it now and take it well. No one but Lenin does it for the good of it. Take it now and learn it. This is Lenin, btw. Hi.

Anonymous 19/03/01(Fri)07:59 No. 16752 ID: 3cc2ab

Labor laws*

Anonymous 19/03/01(Fri)09:18 No. 16753 ID: b0f049

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What Would Happen if You Didn’t Sleep? Anonymous 19/02/17(Sun)13:43 No. 16748 ID: 099d2a [Reply]

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Sleeping is not just nice but it is healthy as well. Lack of sleep can cause some serious health issues, like depression, memory loss, increased blood pressure and risk of stroke, so make sure that you get at least 8 hours of sleep each night. Here is what happens to the body if you do not sleep.

Artificial sweeteners Anonymous 16/02/21(Sun)10:07 No. 16288 ID: f705da [Reply]

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Supposing a given artificial sweetener -- say, saccharine or aspartame -- was a carcinogen, what kind of cancer would it produce and by what mechanism?
If this question is too hypothetical to answer, by what mechanism would ingesting a non-toxic chemical cause cancer?

13 posts omitted. Click Reply to view.
Anonymous 18/12/28(Fri)17:15 No. 16736 ID: be6f8f

>Food can not cause cancer
Well, artificial sweeteners are not food. They have no nutritional value.
On the other hand, heavy alcohol consumption can cause cirrhosis of the liver, which increases the risk of liver cancer.

>Cancer is caused only by bacteria and viruses.
What about things like ionizing radiation, or exposure to contaminants such as tobacco smoke, asbestos, etc.?
What about hereditary cancers?

Anonymous 19/01/27(Sun)19:04 No. 16743 ID: c00a95

Ionizing radiation does not cause cancer, but radiolysis, it is the accelerated decomposition of tissues, and not their degeneration in a structural form. Radiation can cause mutations in embryos, but it is not cancer.
Carcinogens and toxins are capable of causing cellular automaton breakdown, but for this, the body’s immunity must already be undermined by the introduction of viruses and bacteria, or by exposure to parasites.

Anonymous 19/01/28(Mon)20:05 No. 16744 ID: be6f8f

Radiolysis is the breakage of chemical bonds caused by exposure to high-energy particles. For example, such a breakage could happen inside an ADN molecule, causing its later copy to have an error. In other words, a mutation. Such a mutation can be cancerous.
Quoting Wikipedia:
>Exposure to ionizing radiation is known to increase the future incidence of cancer, particularly leukemia. The mechanism by which this occurs is well understood, but quantitative models predicting the level of risk remain controversial. The most widely accepted model posits that the incidence of cancers due to ionizing radiation increases linearly with effective radiation dose at a rate of 5.5% per sievert.[3] If the linear model is correct, then natural background radiation is the most hazardous source of radiation to general public health, followed by medical imaging as a close second.

When someone says "X causes cancer" or "X is a carcinogen", they're not saying "if you do X once you'll get cancer the following week". What they're saying is "X can increase the rate of mutations in your DNA, and a higher rate of mutations is a higher risk of cancer over time".

>Carcinogens and toxins are capable of causing cellular automaton breakdown, but for this, the body’s immunity must already be undermined by the introduction of viruses and bacteria, or by exposure to parasites.
That's not true. The immune system is capable of killing some mutated cells, but not necessarily every possible mutation. A typical infection can last what, a few weeks at most? Cancer lasts for months or years. If not having cancer was just a matter of having your immune system up to snuff, practically no one would ever get cancer.

Also, what a silly argument. If I see you wearing a helmet and then take it off, and while your head is uncovered I smack with a club, would you say that the cause of your headache is that you took your helmet off, and not that I hit you with a club?

What Different Blood Types Mean? Anonymous 19/01/23(Wed)22:32 No. 16741 ID: 175ba2 [Reply]

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The first experiments with human blood donation happened in the early 19th century. Did they even know what blood types were back then? Wait, what are they?
You can read more here: https://bit.ly/2DtOqs7

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