Archived threads in /sci/ - Science & Math - 308. page
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Why do nervous systems use slow, chemically mediated pulses of voltage change rather than fast electric currents along wires?
Because you cant fucking evolve wires you retard
>>7946797
kek
>>7946797
Why not?
What are the rules as far as Sigma-Aldrich and other chemical suppliers selling lab chemicals to people who aren't professionals/ institutions? Will they sell me concentrated acids and other reagents that require special care within reason (not like elemental fluorine or some ridiculous shit)?
I know there is some stuff I can't buy because it is DEA restricted or whatever, but if I order stuff that can be used to make it would that be OK? Like let's say I need phenylacetone for an experiment and order benzaldehyde then order nitroethane a few months later....
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take your pedophile cartoons back to >>>/a/
>>7946188
> Will they look at my purchase history
Yes.
> send the DEA to shoot my dog?
If you order precursors to methamphetamine from Sigma-Aldrich, they are required by law to send your shipping address and payment info to the DEA.
Seriously, do you think you're the only one to ever pick up the Anarchist's Cookbook?
>>7946188
>I want to continue my study of chemistry on my own at home
this is pretty fucking stupid
Best youtube educators and resources? Any subject welcome.
I found this guy surprisingly motivating.
www.youtube.com/watch?v=sMYX_TRXaMU
>>7946128
Pretty good, almost would subscribe if he taught a useful lanquage.
>>7946232
TURNED DOWN FOR WHAT
Why do I get an urge to do Maths when I'm drunk or even tipsy, /sci/?
I love Maths, but when I'm drunk or tipsy I get a serious urge to bust open a textbook and study Maths.
Is there a scientific explanation for this?
>>7945851
This board is why i no longer hate maths. I literally replaced vidya with differential equations now.
>>7945855
OP here.
You replaced vidya with Maths? Isn't vidya way more exciting and enjoyable?
Now, don't get me wrong, I know that solving Maths equations is a somewhat 'addictive' feeling, but video games were created to be enjoyable. Maths wasn't,
>>7945870
Even before I came on this board I got bored with vidya. Usually after 3 days of playing or so. If vidya is meant to be enjoyable, it's as temporary as some psychedelic.
What is the hardest thing about a mechanical or electrical engineering degree at undergraduate level?
>>7945754
The math.
It's easy to remember if an particular oil filter works of absorption or adsorption or if a diode works like this if a capacitor is working like that, but the math to figure out the dimensions and density of an electrical field of a capacitor or an alternator between cycles is waaaaaay harder and more complex.
talking to people to try and get a job
>>7945754
Trying not to get raped by all of the gay men.
picrel: banana slugs
>>7944730
Scientists need to learn some humility and stop playing God. It's all very well cross-breeding bananas with slugs and laughing at the result, but they'll be laughing on the other side of their faces when these bananaslug abominations take over the world and enslave everyone.
Humans desu senpai
>analysis
>not an irrelevant garbage field that was borne out of the cold-war-stalemate of oneupmanship that is `mathematical rigor' started by Hilbert in the 1900s
pick 1
>>7944206
my point is that mathematics can advance appreciably more quickly if we didn't have, as a field, this childlike obsession with rigor
math was created to explore, not to dwell on trivialities, fringe scenarios, and arcane consequences
>>7944210
Is this rigorous?
>first world
>highest cancer rates
Why?
>>7943910
alcohol, smoking, living longer.
>>7943910
old people = more cancer
In third world life expectancy is lower.
>>7943920
That would be my guess as well.
To what degree do Kuhn and Popper's respective descriptions apply, either normatively or descriptively speaking, to contemporary science?
Consider the recent LIGO report of gravitational waves as an index of two black holes of >20 solar masses colliding. The observer team published multiple manuscripts on this, including one in a nominally Popperian tone:
>Tests of general relativity with GW150914
>... Within our statistical uncertainties, we find no evidence for violations of general relativity in the...
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>>7943406
I'd say almost completely. The basic "science is models + falsation within a paradigm, not verification" definitely applies 100%. Whatever the media reports doesn't matter.
I imagine small revolutions take place within fields constantly and you'd need to be an expert in them to find out. I study math and I don't think there's been a paradigm shift since we jumped to formality with Godel and shit.
I like philosophy of science but this really isn't science or math...
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>>7943435
>I imagine small revolutions take place within fields constantly
A Kuhnian revolution is never small. It's a paradigm shift - e.g. going from Newtonian to Einsteinian gravity.
>I like philosophy of science but this really isn't science or math and it sparks tons of discussion among people who don't know shit about philosophy. I'd try to keep this at minimum.
It seems it didn't, in this case.
>>7943587
>It's a paradigm shift - e.g. going from Newtonian to Einsteinian gravity.
Then the next paradigm shift is from Einsteinian to Barnettian physics.
Is fear of becoming dumb a viable reason to pursue a STEM career?
define dumb
First you have to tell us the origin of the fear
>>7943355
The feeling of ignorance and inferiority when you listen to other people talk about things you don't understand, even though you feel you should.
>>7943371
I don't really know. I guess I just don't want to end up with a dead-end job any retard can do, which I couldn't talk about or feel proud about.
Why are first impressions very significant and used to judge someone or something ?
Can't people simply comprehend the basic fact that they simply lived a very tiny and random percentage of a huge experience ?
>>7943116
you have to decide if someone is a threat or not on the spot.
You don't really have time to ask a killer for his childhood memories and his girlfriend.
>>7943127
Do you go out on the street and assume everyone is a killer ?
>>7943161
Not him, but I do.
Lets have a thread about PhD level chemistry.
What are you all working on and how are your papers going?
Any particularly stupid people in your labs?
Worst fuckup recently in your department?
Ever wreck any expensive equipment?
About to start work on my third paper. Hope to be out by year 6.
>>7942000
Well it's time someone told you...
It's just high schoolers here
>>7942002
I was in a thread just a month or two ago filled with PhD candidates in chemistry.
>its a lets steal an image from lit and make a post spread basically existing on Sci but I'm too fucking lazy to use the catalog thread
Is it or nah?
>>7936060
I feel that it is very natural to include it.
>>7936064
lel, no.
N is created only to have The principle of induction, which is the most dubious inference rule of all.
>>7936060
return Does 0 fuck up shit ? 0∉ℕ : 0∈ℕ;
>mfw maths fags say "puting stuff into an equation is not maths"
>>7946754
it isnt, it's called computation.
>>7946758
>all of 12 - 18 year old mathematics and early college mathematics is not mathematics
Why isn't it called computation then?
>>7946761
Because it was always called so and the parents would shit on the teachers if they tell them that the symbolic manipulation they struggled their whole life with is not mathematics
How will climate change projections change if the world converted to 90% of electricity produced by nuclear power?
How do I model that?
I don't know how you would model that since you would need to also find a way to determine what happens to cars and planes. I think the graphene battery would better reduce emissions than nuclear but I'm turbo pro nuclear too so... I would imagine there would be an elastic phase where we would experience a cooling which would held freeze much of the carbon monoxide in the ice and then it would level out by warming a little.
In a perfect world we would have graphene circuits, graphene batteries, graphene solar panels, graphene filters and miniature nuclear reactors...
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>>7946455
It wouldn't expunge CO2 from the atmosphere, nor would it place oxygen, which we need, into the atmosphere.
Due to the density differences CO2 stays under while Oxygen floats away.
Anyway, take the world's amount of electricity prouduced by CO2 emitting production systems and multiply that by .9. There's how much it will've changed.
>>7946546
Sorry, by .1*
