Archived threads in /sci/ - Science & Math - 880. page

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What the fuck is infinity all about /sci/

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THEOREM: You are a great scientist if and only if you have a mustache.

PROOF: It's true.

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Things happened to me (smart but lazy):
* seeing random symbols when going to sleep.
* dreaming of solving problems when sleeping.
* hearing a woman explaining a theorem while waking up.
* associating handwriting to personalities.
* semi-consciously applying math problem solving when talking to people.
* ...
Mine are minor and stupid. But:
>He [von Neumann] believed that much of his mathematical thought occurred intuitively, and he would often go to sleep with a problem unsolved, and know the answer immediately upon waking up.
https://en.wikipedia.org/wiki/John_von_Neumann
>When asked about the methods Ramanujan employed to arrive at his solutions, Hardy said that they were "arrived at by a process of mingled argument, intuition, and induction, of which he was entirely unable to give any coherent account."
https://en.wikipedia.org/wiki/Srinivasa_Ramanujan
>He was not a very careful person as a mathematician. He made a lot of mistakes. But he made mistakes in a good direction. I tried to imitate him. But I've realized that it's very difficult to make good mistakes.
https://en.wikipedia.org/wiki/Yutaka_Taniyama

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What do we know about psychedelics?

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Is there a black hole in the core of the earth?

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hello /sci/, sorry, I know you're not my "tech support" for math in real life, but I need your help.

Basically I need some math formulas for calculating liquid ratio (it's far more stupid than it sounds)

So let's say I have a bottle of 1,000 ml capacity, and I want to fill it with 60% juice and 40% water

well it's easy because 1,000 is (forget the term) like 10, 100 , 10,000, etc. so you just put 600 ml of juice then 400 ml of water

the problem comes when it's not 1,000, let's say a arbitrary number like 784

you still want to fill it 60% juice and 40% water but how do you calculate how much you need of each?

---

another problem

let's say you want 50% juice and water

you have 200 ml juice, so you add 200 ml water, capacity isn't important

again, 50/50 is easy to do, you just add the same quantity

but what if it's another percentage? let's say you still have 200 ml of juice but you want the total to be 66% juice and 33% water, how do you calculate of much water you add?

I probably learned that shit when I was a kid but completely forgot, sorry for my retardness

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Can anyone please describe what happens on that video.

/sci/ seems as the most related board to my question.

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what kind of hobbies or creative pursuits would be conducive to success in science if there are any

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Calc II class (Integral Calculus for international bros )uses this shit tier textbook. Also l learned Calc I from the same textbook.

Can you guys recommend a more rigorous book I can use to supplement/ use alongside this book if I want a better, more advanced understanding of the material? I haven't had any sets/ proofs/ formal logic classes so don't just tell me "le prove everythings xDDD"

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How do I find the area between two curves?

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Hello again friendos, time for /ogen/

>Recommend me a textbook
Wade, Clayden, Solomon, Klein, whatever. It doesn't actually matter too much, you just need to keep doing practice problems (I really like the problems in Bruice). Here's more books worth checking out:
Fleming's "Frontier Orbitals"
Silverstein's "Spectrometric Identification of Organic Compounds"
Meissler's "Inorganic Chemistry"
Cotton's "Advanced Inorganic Chemistry"

***********Please don't shit up the thread asking for textbooks.***********

>Guys I'm a future doctor taking organic next year. Tell me how to get a good grade!
Just make sure you memorize everything. Don't bother trying to understand the concepts, that's a waste of time and is meant for actual chemistry students who'll need it later on. It's a lot easier if you just brute force your way through it and memorize all the mechanisms.

>I'm a pissant undergrad, how do I into synthesis research?
Go walk up to a professor and tell them you want to work in their lab. Most are glad to take on a new student, provided you aren't completely retarded - you're basically free labour. Note that if your school has a lot of future doctors then you might have to compete with them on grades, some of them might also be bumming the prof so they could pad up their applications. Also note that if you're at a big fancy school you're gonna need good grades regardless bud

Also obligatory
>premeds need not apply

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My professor draws sigma notation unironically like pic related, should I drop the class?

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What factors other than genetics determine penis size?
This might sound ridiculous but, I have a feeling there's a correlation between chronic anxiety and inhibited penis growth.
If someone tends to be anxious more of the time and has higher sympathetic tone, less blood is in the dick on average so it doesn't grow as much.
Also is there a correlation between hand size, finger size/length and dick size? Seems to be.

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So /sci/?

>The main question is whether this detailed data may be trusted at the centennial scale. If it can, the centennial averaged temperatures at a place, in this case a place in Antarctica, may very well change by more than 2 °C in one century. The causes of these warming and cooling episodes were almost certainly natural. It's almost completely normal for the temperature to change by more than 2 °C per century. What we were getting in the 20th century is much more modest.

>But this isn't the most important point, I think. What I find more important is that the Vostok data indicate that there simply exist natural reasons that may change the temperature by more than 1 °C and perhaps more than 2 °C per century rather often and these effects, whatever they are, therefore may be responsible for the 20th century "global warming", too, or for most of it. Also, 1-degree or 2-degree warming episodes were often followed by similarly abrupt cooling (or vice versa). We can't really exclude this possibility.

>The 20th and 21st century may really be analogous to the years between 6226 and 6043 B.C. Back then, the temperature went up by 2.5 °C in the first century and returned back down by 2.5 °C in the following century. How confident you may be that the 21st century won't experience similar cooling as the cooling between 6091 and 6043 B.C. which followed a century of rapid warming? I think that you simply can't be more than 99 percent confident because in 1% of cases or so, the Earth managed to produce a significant cooling like that.

http://motls.blogspot.com/2017/02/vostok-warming-or-cooling-by-2-c-per.html