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Archived threads in /sci/ - Science & Math - 2059. page

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is it possible to deduce where it is?
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It's like finding a baby in woman's vagina without her being fucked. Nope. It's 50/50
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>>7738511
>Who is Jesus Christ
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>>7738502
That's a 50/50
What version of Minesweeper is that?

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If a sun made of ice collided with a sun made of lava, what would happen?
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It would create an incredibly large number of exotic particles that would could use to warp space and travel faster than light
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>>7738404
Lava is made of some relatively heavy elements that wouldn't be able to sustain fusion for long. It'd probably make a pretty big boom.
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**THIS POST IS ONLY SUPPORTED ON GENTOO**

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If everything is made of molecules and mostly empty space, and molecules are atoms combined with mostly empty space, and atoms are made of subatomic particles and mostly empty space, and subatomic particles are energy and not really solid, then can we say we have never found anything solid?

Do we have any pictures of atoms or subatomic particles that suggests they are actually solid, or can we only measure that they should be there?
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E=mc^2 energy and matter are one in the same, which i think you're not understanding from your argument. Other than that, neutron stars are almost completely composed of neutrons (we think) and therefore "very solid" with no full atom structures to create empty space they're extremely dense.
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You clearly have no idea what the word "solid" actually describes.

https://en.wikipedia.org/wiki/Solid
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>>7738146
>https://en.wikipedia.org/wiki/Solid
So being solid is kind of an illusion then. Some atoms are resisting changing their formation, but there is nothing really lay-person-solid there?

ITT: post facts an mnemonics you use to remember them.

Fatou's lemma: Put the limit on the outside, nigga, and that's the side that's gonna be bigga!
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Please tell me how to remember Stokes Theorem, the Divergence theorem, Greens theorem and all of Lin Alg please
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>>7738025
>Put the limit on the outside, nigga, and that's the side that's gonna be bigga!

my sides
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>>7738025
Literally who can't remember Fatou's lemma

It's one of the few intuitively obvious results

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I have a little something different for the /sci/ board. I posted this on /an/, but it occurs with people more knowledgeable about astronomy is probably a better place. Hopefully this isn't breaking any forum rules.

I need an astrology-based name for a male Great Pyrenees puppy. His sister's name is Luna, and we wanted to keep the theme going.

I've been shot down for:
Astro
Comet
Leo
Cosmo
Pluto

Any ideas, /sci/? I love astronomy but never had time to pursue it, so my knowledge in the area is lacking.

Thanks for your time.
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Since one's named after the moon of the Earth, why not go for another moon's name?

>Deimos/Phobos for maximal edge
>Callisto
>Titan
>Io
>Atlas

actually just refer to https://en.wikipedia.org/wiki/List_of_natural_satellites
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>>7738014

Name him Muhammad
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Also,

>Astrology-themed Puppy Name
>Astrology

wew lad

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I am graduating my bachelors in neuroscience at one of the better universities (worldwide) for it. But, I lost my passion for the brain about halfway through the degree. I'm 23 and thinking for studying an engineering degree, focusing on biomedical or mechanical.
How ridiculous does this sound? I would love to work with BCI and prosthetic devices.
11 posts and 1 images submitted.
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It doesn't.

I have a BS in Pure math, an MS in Applied Math and I'm finishing up an MS in MechE and PhD in Applied Math. My research is in stability/bifurcation theory and control theory. For the MSME, my reaearch is in robotics/control theory.

Shit happens, senpai. You just get the itch.
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>>7737816
>bachelors in neuroscience

If you had a PhD in neuro coupled with an engineering degree that would've been ideal for a research career, but if you do your BEng/MEng now you're pretty much only going to have access to same jobs any other Biomed BEng/MEng has.

Honestly I know you said you lost your passion, but if you don't go to grad-school for neuro you've pretty much wasted the last 4 years of your life.
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>>7737820
I'm not interested in pursuing research, I would like to create a legacy for myself and future family. Why would I pursue a career I have no passion for when I could change now? I will never be a great neuro scientist, I may be great at innovating bio/mechanical inventions which work with the brain.

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http://www.theguardian.com/world/gallery/2015/oct/29/north-korea-atom-nuclear-science-centre-pictures

So /sci/, why havent you moved to Best Korea yet ? It is well known that under communism, science can progress without too much hesitation.
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I don't think I'd be useful, these guys have already figured fusion power out. My primitive western education might as well be in alchemy.
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>>7737751
You can even see in the picture the shitty neighbourhoods surrounding the laboratory. They couldn't even bother to take it from a good angle that only showed the 'progress' they fake by doing this shit.

Other than that, good for them. Hopefully they actually have scientists that can do research that has never been done before. So that when the dictatorship falls in a couple of decades North Korea joins the academic community and we can advance our technology a bit faster.

They probably have a high IQ population. It's sad that they are still political shit.
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>>7737751
>You can even see in the picture the shitty neighbourhoods surrounding the laboratory. They couldn't even bother to take it from a good angle that only showed the 'progress' they fake by doing this shit.

By shitty neighbourhoods you mean commie blocks? They don't nessescarily have to be shitty but in general they are, but lets not judge to quickly.

I do not think that the dictatorship will fall in a couple decades. They have big plans when it comes to nuclear energy, and it would be great to replace to coal plants with. I kind of see North Korea like Solaria in Isaac Asimov's novels...We don't really know what stuff is going on there.

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I dont know why people care about the SpaceX landing.
NASA did the same 10 years ago.
Proof:
https://youtu.be/FZ-H-A9Vzdo
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>>7737703
NASA is a joke. The real innovation happens though military contracts: R&D
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>>7737703
This is some proper quality bait. I'm impressed :p. Only sad thing is that people might actually think this is real.
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>>7737703
I'd literally suck Elon Musk's dick if he'd let me. Honestly, I love the fuck out of the guy no homo

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Scientists have a very ill formed definition of philosophy. Philosophy is a quest for objectivity just like science, that's why science was derived from philosophy. The philosophical method is much broader than the scientific one, applicable to human affairs and even to worlds that aren't actual, that's the power of introspection. They conclude that philosophical discourses are nonsensical because of their preconceived notion of sense data as the only source of objectivity, a notion derived from the philosophical method, after all you can't empirically verify that statement. But that assumption is what give scientific discourse the objective status, a assumption that every scientist in a lab makes even though they're not even aware of, the epistemic framework of science has a philosophical foundation.

If you as a scientist want to criticize philosophers try to analyze their claims from a philosophical perspective, because if your definition of objectivity is sense data then of course you're gonna think they're bullshitting you. But they're not, they're trying to do the same thing a chemist does in a lab, the problem is that is a lot harder to have that objective ground in philosophical subjects, you can't really use the sense data assumption when dealing with mental states now can't you?

And just to be fair, there's a lot of philosophies out there that are actually bullshit, because you don't really have a rigorous definition of objectivity like science does, then people go wild and claim they're telling the truth. But a scientist to deny the importance of philosophy is simply madness, science is permeated with philosophical assumptions, and being ignorant of them and philosophy in general may get you in epistemological troubles.
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>>7737551
>Philosophy is a quest for objectivity just like science

Science is not a quest for objectivity. Science is phenomenological.

>nd just to be fair, there's a lot of philosophies out there that are actually bullshit,

the problem is there is no clear way to tell what is valuable insight and what is meaningless sophistry. Philosophy lacks a mechanism for self-correction, this is why science pays it no heed. Being right isn't what matters, only being able to PROVE you are right does.
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>>7737562
>Science is not a quest for objectivity. Science is phenomenological.

I agree, but do you think scientists know that? I don't think so. As far as i can tell, scientists do not only think science is a quest for objectivity but it is also the only source of objective knowledge.
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>>7737568
No scientist thinks that. Philosophers are just full of themselves.

So I decided to try to learn more rigorous mathematics, and read Apostol's Calculus and Higher Algebra by Barnard and Child.

Problem is that Higher Algebra is so fucking dry. It reads like the Elements. It's just 600 pages of definitions, propositions, and proofs. Apostol's book was way, way, easier to understand even though the subject is arguably more complex. Are you really supposed to and be expected to learn a subject like that? It's hard to explain, but there's no motivation for the propositions I guess. No stuff "in between" like in Apostol.

It might be that I'm just not used to rigour, but Apostol's book is supposed to be rigorous, but even that has motivations and some intuition behind its formality.

Do rigorous mathematics textbooks really read like that? Just definitions, propositions, and proofs, and nothing else?
16 posts and 1 images submitted.
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>>7737327
Read Hall and Knight or G. Chrystal
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>>7737327
A rigorous book usually follows the Definition, Proposition, Theorem, Discussion structure, yeah.

Also what the fuck is this book you're reading? Why don't you use something more modern for elementary algebra like Khan academy or something? And elements? What the fuck are you doing bro? Please, take a look at a real mathematics curriculum and learn following the syllabi if you're really interested in doing math.

If you already did a chunk of apostol's calculus you're ready for linear algebra, I like Hoffman & Kunze but Axler's good too. If you want rigor you can do analysis, lectures from youtube searching Real Analysis are pretty nice.
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>>7737344
I guess it lacks the discussion part then.

>Why don't you use something more modern for elementary algebra like Khan academy or something?
I was told rigour was important. Khan Academy hardly has a rigorous approach to algebra. I already know the subject, but not rigorously.

The elements I just read as a historic thing, not to learn Geometry.

The book itself might be the issue, but I'm having a bit of issue seeing what "counts" as rigour and formality and what does not.

Is there any scientifically meaningful reason to focus on manned spaceflight besides "To see if we can do it"? I know that the long-term goal will be for the establishment of extraterrestrial colonies but that has more to do with a mixture of sentimentality and the long-term survival of the species. As far as expanding our scientific understanding in a purely practical sense, is there any reason to actually send humans into space?
18 posts and 1 images submitted.
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http://www.luf.org/
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>>7737257
http://techcrunch.com/2015/12/21/spacex-successfully-lands-a-giant-falcon-9-rocket-for-the-first-time/?ncid=txtlnkusaolp00000591
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>>7737207
You have any idea how empty hospitals would be with out space exploration?

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Just got a job at my uni to tutor ochem and calc.

Any TAs/tutors here? Any stories, advice, etc?

TA/tutor general, I guess.
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It'll be my first time doing any tutoring, so emphasis on the "advice". For sure I won't spoonfeed, but I don't have a specific way I'd teach anybody.
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>>7737037
Don't really know what to say about Calc, but I can definitely give you some advice about tutoring O Chem. I tutor it actively and did for about two years before. Plus I TA an OChem lab. I'll give you advice wherever I can.
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>>7737061
Yeah, anything helps. I basically came out on the top of the class for both parts of the sequence and out of nowhere the professor offers me the position for ochem; I haven't the slightest clue how to teach.

So, why is gravity weaker than the other forces? Could it be that the power of a force is inversely proportional to the range that it must act across? Of the three forces mentioned, in order of power they go gravity, electromagnetic, nuclear. In order of range they decay over, they go nuclear, electromagnetic, gravity.

So is it something like k/(Force of the force when two objects are touching)=(distance where force is half as much as when the two objects are touching)?
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>>7736742

>Could it be that the power of a force is inversely proportional to the range that it must act across?

No.

https://en.wikipedia.org/wiki/General_relativity
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>>7736742
>k/(Force of the force when two objects are touching)=(distance where force is half as much as when the two objects are touching)?

No. For instance, that is actually the same distance for gravity and electromagnetism! Both follow an inverse-square law where the force at a distance d is half the force at d/sqrt2.
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>>7738995
The only reason it seems like gravity has a longer range than electromagnetism is just that matter in general is composed of equal numbers of positive and negative charges, so large bodies have almost zero net charge*. Gravity, however, attracts everything, so large bodies build up a truly enormous gravitational "charge". This is why gravity dominates the universe, despite seeming so weak.

*the same goes for magnetism: Since every magnetic dipole has a North and South pole right next to one another, over long distances they cancel out.

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So how do I make sure I become the golden boy?
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>>7735972
Suck his dick.
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>>7735972
you dont want to be
>say goodbye to your weekends
>>
make sure you have at least one side project, two if youre in your first 2-3 years.
Dont suck at presenting your results at lab meeting ie be prepared and not half asleep.

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For what reason are programmable calculators still not allowed?

We live in a world with goddamn internet enabled phones and tablets now and forever.

Why don't they just force us to use an abacus?
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Because you're being tested on your ability to do something that could be programmed into a programmable calculator, obviously.
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>>7735828
What the point?
We don't need that ability anymore.
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slide rule precision was enough to get to the Moon

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