Archived threads in /sci/ - Science & Math - 2025. page

It's easy, don't worry.

>>7762385
Take Epp's textbook, it's easy and enjoyable as fuck.

Recommend me a good intermediate level discrete math textbook, please.

>>7762134
>only book smarts, not street smarts
You're in for a huge disappointment.

You figure out what you're most interested in. Then you start reading.

>>7762143
That's the problem, I'm interessted in almost anything that is relevant.

>go to rocklab
>smash 2 rocks together
>get smaller rock
>smash smaller rock with smaller rock
>get pebble
>smash pebble together
>pebble no break

Ooga booga! pebble am elementary particle!

>>7762120
I, too, read SMBC :^)

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>>7762113
>muh aether clouds!
STFU Kelvin. I bet you didn't even understand the H-theorem. Faggot.

>>7762054
I'd correct Karen's textbook, if you know what I mean.

>>7762070
No I don't.

>>7762075
It means to have sex with Karen, if you know what I mean.

My dick.

Literally.

Biotech obviously.

Self-replicating nanobot swarm with mind upload.

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>>7761844
A (the only comprehensive afaik) contemporary overview on introductory literature to your matters is

http://www.logicmatters.net/resources/pdfs/TeachYourselfLogic2016.pdf

A 100 page overview, including reviews/comments on the classic books.

>am I correct in my understanding that "axiomatic system" is basically what we mean when we say "rigor" in mathematics?
...yeah

>Is there a major difference to the systems [...] we use today and the one Euclid developed?
Euclid didn't know Frege and Descartes (use quantifiers, introduce coordinates, give her the D, and other acts of violence).
Today shit is more formal than before, and you have different systems also (compare Hilbert style and Gentzen style proof theory). But derivation rules like "from A and A=>B being true, we conclude B is true" were and are at the core, if that's what you mean.

>>7761862
ad: I've seen he's since removed the Appendix from that pdf, here are the other links:
http://www.logicmatters.net/tyl/

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>>7761862
That's a really nice text, anon.

So should I try to look into books on set theory and logic separately? I noticed the text does give a number of example works, if I go through the text and read through the books recommended (As well as maybe reading an intro to proofs book), would I be well prepared for the more rigorous parts of mathematics?

Is it hard?

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Pic of a fractured surface (scale is millimeters)

>>7761756
engineering is fedora-tier education everywhere in the world

>>7761758
What is Ecole Normale Superieure?
https://en.wikipedia.org/wiki/Classe_pr%C3%A9paratoire_aux_grandes_%C3%A9coles

Engineering isn't a joke where I live, if you think so you'd better compare the number of Fields medals France got with the score of the rest of the world.
Though I think that US students learn more about computer science and industrial science so that could be where the memes come from

>>7761756
I never learned it until I took Stat. Mech.

>>7761712
>would we of definitely observe them by now?
We could only answer this question accurately if we had experience with galactic societies.
You're asking a question we don't have enough real-world experience to answer.

>Assuming there was no sort of attempted to hide
Perfect example. Why would you assume this?

>>7761712
>see saying stuff like old radio singles wouldn't we?
Probably not. The inverse-square law makes it very unlikely we'll ever pick up stray radio broadcasts from other solar systems.

>>7761723
Yeah that, because if they were years ahead of us they probably would have developed TV one stage in the history if they eventually built starships wouldn't they? But the image of near by aliens watching 50 sitcom is unlikely then?

>>7761727
I hope they like fresh prince as much as we do.

>>7761695

Not 100% sure, but the water around the cup will never get above 212F (boiling point of water). Maybe they are saying that the water in the cup can shed it's heat out the top of the cup faster than heat from the boiling water can enter through the non-zero resistance of the walls of the cup?

>>7761699
>212F (boiling point of water).
the boiling point of water is 100 degree celsius.

Not sure if thats true but as soon as water reaches the boiling point(depending on airpressure) at 100°C, it wont become hotter. it will stay at 100°C. The cup keeps the temperature of the water in it always slightly below 100°C.

Friction and air resistance

>>7761666
but it does work. just not forever but if we scale it up for a couple of years maybe?

>>7761668
yea sure, what's your point?

>>7761636
Doing OCR Chemistry (old version) in one go

Exams in May/June

That's Krebs up there, ye

>>7761636
Kek A levels are now fucked up shit.

The funny thing is it's all the humanities' fault for being shit and having too much coursework.

They have removed pretty much all coursework now, even the tiny 10-15% you had in hard sciences that were actually really useful for universities to work out which chucklefucks has no common sense.
Now you have to sit AS exams that don't even contribute to the final mark, so then the final A2 exams can ask you ANYTHING from both years syllabuses.

Good fucking luck, and remember that pretty much any degree (except for the last year maybe) will be miles easier than A Levels (assuming you get decent grades).

>>7761636
absolutely massacred my alevels when I did them

A*A*ABb

the A*s were in maths and fmaths

>>7761542
There are model rockets that use small SRBs. Good luck obtaining rocket fuel and building engines. You basically need to be Elon Musk

>>7761550
I'll think about SRB's as for the rocket fuel i found a place where they sell the stuff....anyways the problem isn't the fuel or engines problem is trying to get it past earth's gravitational pull i don't know what material is best for the construction of the rocket...

>>7761553
Rocket fuel isn't that hard, even plain kerosene will work. Oxidizer is the fun part though.

SRB-based amateur rocketry is closely related to firework making, and these can reach pretty good altitudes. You'll find a plenty of recipes for powder-based rockets using saltpeter as oxidizer and various fuels like charcoal, aluminium oxide, sulfur, and many others. It's a pretty common hobby.

Now if you want liquid-fuel rockets, things get more tricky. Best if you could get access to a cryocooler that can produce liquid oxygen, but these are NOT common. Another approach is welding oxygen, you can even use acetylene as the fuel, using the standard welding setup as your fuel source. And if your fuel and oxidizer are pressurized, your problem with turbopumps or pressurizer gas vanishes. Just a common bell nozzle (should be doable with a common lathe), injectors (just tiny "sprinkler" nozzles), ignitor (spark plug, or even a piece of fuse), and you're fine. Getting the proportions between oxidizer and fuel would be a lot of work, and you will not get your rocket very far because your combustion chamber will soon overheat, but a couple hundred meter, even a couple kilometers should be well within reason.

And don't worry about the combustion chamber shape too much. Straight cone gets some 80% efficiency of the "optimal" bell shape, so even roughly right will still get you good 95% efficiency of "real" rockets. What you need to worry about is getting the mix right, using fireproof materials (the combustion chamber will run REALLY hot without cryofuels for cooling), and safety.

Depends on what drugs you are on. I recommend amphetamine.

>>7761516
I'm not on any drugs other than caffeine.

I just want to take a like 4 hour power nap and be on with my business

>>7761521
As I said, amphetamine is probably your safest bet.

It's a pseudo science.

If you'd like to discuss psychology do so on >>>/trash/

>>7761480
stupid meme
stupid memeposter

That original album cover was disturbing for some reason