Archived threads in /sci/ - Science & Math - 415. page
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Come on, go ahead, prove that you're as smart as you all think you are
I can't figure out how to use a proof by induction on such a sum
>>7800025
>Capture d’écran
>frogposting
>>7800025
not sure what Pk(n) is supposed to be...
hey sci /dumbfuck/ here. i need some direction. ive been studying for the SAT on khanacademy and i'm having trouble finding where to start bolstering my mathematical skills. i'm taking the NEW SAT in march so i want to pack in as much study as possible. any help on where to start would be much appreciated.
P.S. i live in the middle of nowhere and my school is one of the worst in the country so thats why i'm using khanacademy
i'm posting my stats so you guys can see it, thanks.
Geometrist?
>>7799536
Roundtangle
>>7799536
topless and bottomless circle
>>7799536
Fat rectangle
https://www.youtube.com/watch?v=bp4NkItgf0E
What do you think of a possibility that we're in a computer, or that the universe functions like one as a simulation? Are we really in a matrix?
More info here: https://en.wikipedia.org/wiki/Adinkra_symbols_(physics)
>>7798163
I got to UMD, had that guy as a professor. He is brilliant.
>>7798163
I was about to post this, when did he come out with the findings?
Had a black man for my discussion groups in Real Analysis, he was an OK person, made me regain respect for black people
But the niggers in my class are fucking annoying
when will the next mind blowing and exciting scientific breakthrough finally happen?
2020, when some genius figures out quantum gravity
>>7794495
That already happened. Guy's name is Edward Witten. The breakthrough will be when it is experimentally confirmed.
>>7794515
isnt all of his work going to be void if string theory turns out to be wrong?
semi-major axis = 30.06AU
does not obey Titius-Bode Law
therefore rogue planet
>The formula suggests that, extending outward, each planet would be approximately twice as far from the Sun as the one before. The hypothesis correctly anticipated the orbits of Ceres (in the asteroid belt) and Uranus, but failed as a predictor of Neptune's orbit and has since been discredited further.
Kill yourself, plutofag.
>>7801522
>failed as a predictor of Neptune's orbit
bcoz rogue, Neptunian
Is it correct to put into the context of freedom the fact of its non-existence, via association being necessary, that it does not exist as if it were to be defined that it would be bound?
Are we living in the setting sun of the freedom of the universe's plight to define what does not bind it and by extension the means ascertain it once again?
>mfw the Yoda speak is weak with the geeks
You're like a buddhist who only uses his rational mind.
I guess the real freedom comes with not consciously thinking about these kinds of profound abstract concepts.
Also, this is philosophy. Sage.
I set up about 12 vacuum manifold in a teaching lab. Regular grease on the stopcocks. Put everything up, then tested the glass stopcocks for leaks. No leaks, bubbler stops when stopcock open and vacuum works well, all is well. I go and check on that shit now months later and little to no change in the bubblers when the stopcocks are open to gas. Any clue? Only thing I can think of is the grease has thickened up in cold weather and clogs things but that sounds wrong. When I plug the bubbler it forces the gas out the open stopcock but when I stop the flow stops. Also jammed a...
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>>7801447
>Also jammed a pipe cleaner up the stopcock and that fixes it until I turn the stopcock again.
That was going to be my first suggestion.
There's probably a bunch of solvents and shit in the old grease from months of use and this could change the viscosity.
Just begin anew, wash away all the old grease with hexanes and apply fresh.
>>7801465
I thought that too until I set up a crippled manifold today that I had to plug up a port because somebody stole the stopcock. Cleaned it, greased it and sometimes the stopcocks work and sometimes not. Though reading your reply reminded me that I have some thin brushes that might do better than pipecleaners if the don't bend to shit before they do anything. I also want to trouble shoot things a bit better before I redo 48 stopcocks and end up where I started again.
>>7801486
Are the stopcocks mated?
Often each port and stopcock are labeled with a number and for best results you need to match the numbers on the port to the number on the stopcock.
Or if not, could we at least keep it Earthbound?
As in, when we take to the stars we make sure no carriers of the common cold/influenza/HIV/herpes/etc get to come along?
Oh, it wont be hard to keep it EARTH BOUND if you know what I mean.
pst... We wont live on other planets
>>7801374
Or, or, we could kill everyone that has the cold right now!
>>7801411
It's not possible to carry that out, though.
I mean it's only a short isolation program to keep long-term inhabitants of other planets from leaving and carrying an illness with them.
Hi /sci/
I'm doing work for my organic chem 2 class and it's been about three years since I did the first class in the series. I think I'm understanding the current material being presented but there are a couple of blanks in the middle that I think I'm missing out because lack of background knowledge.
This question is based on carbene addition to alkenes.
Two points I'd appreciate being clarified:
1. In (c), through what mechanism is there a carbene being formed to be able to attack the double bond on the cyclohexene? I'm...
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Okay, I just figured out the reasoning for question 1. I'd still appreciate input on 2 though.
>>7801361
>In (c), through what mechanism is there a carbene being formed to be able to attack the double bond on the cyclohexene?
That's the Simmons-Smith reaction, and the mechanism generally gets ignored in undergrad organic classes b/c no one gives a fuck.
>2. In general, the carbene attacks the double bond on the alkene to form a cyclic formation (epoxide?).
Not an epoxide, but a cyclopropane.
In c) the carbene is dibromocarbene (deprotonation...
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>>7801372
argh I fucked up the lettering at the beginning of my reply b,d,e are all simmons smith, c is not
https://www.youtube.com/watch?v=LL_VGGj3XaQ
>>7801280
>climate change
Lol
>>7801280
>Youtube, the text host
>>7801280
well in earth's history so far there has only been a relatively short window of the right conditions for complex intelligent life to exist so it's not that strange an idea that a lot of reasonably smart alien cunts get killed off by their planet becoming unable to sustain them before they manage to get off their planet.
What are the best books to start self-studying quantum theory?
>>7801188
Shankar
>>7801188
griffiths, shankar, schaums
Let's have a cognitive science thread!
Can the brain be trained like a muscle?
For example, is it possible to come up with a workout that maximizes IQ gains?
Perhaps something like
5x5 sets of math problems
5x5 sets of physics problems
break
3x10 sets of programming challenges
Could this work? How many IQ points could someone gain in a month?
Also in muscle fitness we know cardio kills your gains. Is there an analogous phenomenon for the brain? Do unintellectual activities kill your IQ gains?
>>7800681
LSD is probably a better avenue to take. IQ is just logical intelligence, like puzzle solving, so do puzzles all day if you want to get more effecient at them, but its not making you more creative or smarter in anyway me thinks.
>>7800718
Isn't creativity just a side-effect of intelligence?
>>7800718
>tfw basement dwelling nerd with no friends
>tfw want to try psychedelics but wouldn't be able to find any
>tfw you are QPU misaligned
>>7800669
>tfw when no scuttlebug jamboree
>tfw you only run backward for 11 hours and aren't going fast enough
If we devoted all of the world's resources to space travel, how far would we be able to get in the next decade in terms of interstellar travel.
about tree fiddy
>>7800126
The world's resources are already all in space, you donut.
