Archived threads in /sci/ - Science & Math - 1636. page

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atomic matter really does start out as hydrogen, and the last phase of a (large) star's life does produce iron (heavier elements are produced pretty much only in supernovae). and indeed, everything heavier than hydrogen and helium was pretty much made in a star.

as for the keys to life, you might see it represented as CHNOPS (carbon, hydrogen, nitrogen, oxygen, phosphorus, sulfur), but at its most basic it can be reduced to the peculiar properties of carbon and water. water acts as a good solvent, allowing for a whole suite of chemical reactions in aqueous solution that don't otherwise happen. and carbon is unusual in that it "likes" to be in states with valence 4 and bonds readily to elements other than itself, allowing for the creation of complex macromolecules using carbon as its backbone. another happy property of both is that they are present in multiple forms at conditions close to those of a planet's surface. water's triple point (where vapor, liquid, and solid can coexist) is near STP, and carbon can be present in solid (CaCO3, carbohydrates), liquid (long-chain alkanes), and gaseous (short alkanes and CO2) phases under common conditions. this allows for better transport and circulation of carbon, which is conducive to life.

so yes, accurate to within artistic license.

>>8114239
Hydrogen is the most abundant element in the universe. It's the first and simplest element that forms stars, and Iron is supposedly the last before a star goes supernova.

Also, carbon and water are the most common elements of life. But H20 is a molecule, not an element, so that kind of ruins the elemental theme of it. Of the elements, oxygen is much more abundant than carbon.

Of course without DNA which includes other elements no life would be possible. But I'm guessing he wants to avoid larger organic molecules.

https://www.youtube.com/watch?v=ogC6ds81gek

Yeah if you play with realism overhaul with the principia mod in the real solar system mod.

Basic principles and navigation/celestial mechanics? Absolutely.

Rocket/spacecraft engineering? Barely.

>>8114165
What's wrong with

3 space + 1 time = 4 dimensions

?

looks like OP is in highschool and got cucked by a geometrytard

>>8114170
Try to imagine that. What kind of object do you end up with? Describe it to me.

>>8114148
Stays the same
You'll just have double the volume

>>8114162
May I ask why?

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>>8114164
>May I ask why?
temperature is a measure of energy DENSITY
how else did you think it would work?

>>8114132
try http://ocw.mit.edu/courses/mathematics/18-03sc-differential-equations-fall-2011/

introductory ODEs is a bullshit class by the way, only thing worth learning is the laplace transform

>>8114132
If you want help with your homework, go to /wsr/ - Worksafe Requests

If you guys spent as much time trying to take over /wsr/ as you do here, you might be happy.

>>8114137
Thank you! That really helps a lot!
>>8114163
Can you read?

>>8114111
As far as I can tell, there's a 50/50 chance. So who knows.

>Does this thing I've taken out of context prove X?
We don't know what it shows without the fucking caption.
Maybe you shouldn't post a figure without the paper.

>>8114111
Illuminati confirmed

It's basically statistics and optimization.There is almost no computer science involved except notions of computational cost.

The fuss is about discovering what works best for your application. There are no recipes. So if you want to apply it one day, you need to take educated guesses and experiment. You just need to know how and what educated guesses you might take.
If you start doing k-means on a swiss roll, you're a moron.

>>8114040
I wonder why we don't have people do this stuff in applied statistics departments instead. A lot of people I've seen trying to work in this field seem to be lacking a very solid foundation of statistics.

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>>8114050
where I am, it's distributed mostly between computer vision labs, robotics labs, mathematics and CS-related labs.
I agree that reading papers can be a bit unsettling if you lack in statistics. I thought I was ok but when I had to read a few papers I realized I was lacking as well.

>>8113955
>Vol1 (March 25, 2014)
>Vol2 (July 19, 2016)

I doubt there are many schools that adopted it before the full sequence was released. Even the Yale course it's based off of uses another book.

>>8113975
r u telling me it's shite?

bamp

>>8113913

No. Now imagine you manage to hit 100. Imagine life expectancy can be increased within your lifetime by a few decades.What else are you going to do with your life?

Sounds like a great question to ask your school. Who's your PhD supervisor going to be?

>>8113927
Idk. I literally just thought of going back today.

>>8113839
I blame the Jews.

it was launched assuming the dirty snowball theory was correct

>>8113839
no landwhales on a comet

>>8113666
>memorizing the periodic table
>mindless number crunching

Because chemistry beyond gen chem is fun?

>naming conventions are a total mess
yes.

>>8113666
Eh. You have math at the purest level. Then there's physics. Chemistry is just very, very applied physics, as such. Of course, that means that we have to obey the preceding paradigms (phys and maths) on top of ours.

I'm an industrial chemist by profession. Trust me, many of us aren't exactly sure of what we're doing or why it works.

I ended up making rubber with a seal manufacturer. It involves all and none of my chemistry at once, in that, no one gives two shits about the theory (because I'm the only chemist there), but I'm expected to simultaneously know ALL the theoretical chemistry as well as the modifications to make it function in real, practical life.

Number crunching is easy, we usually pass that on to computers. Great excuse to buy personal beast pcs using grant money.

It eventually starts making sense... eventually. Or well, you start to understand why certain conclusions are as they are - and simply accept that.

tl;dr chemfags are possibly permanently high as a result of solvent exposure

>>8113700

>accepting certain conclusions

So what did you not understand? I am a chemistry major and not once did I just accept something. That would be stupid af

>>8113471
or would the warp field do other shit with the solid matter?

assuming that 1 = 2, then would it be possible that mathematics is all wrong?

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>>8113475

>>8113355
f you want advice regarding college/university or your career path, go to /adv/ - Advice.

>>8113355
Because many students need the hand holding not to fail since it's their first real problem solving class. You can always read Kleppner & Kolenkow or Purcell & Morin if you want something to the point and more intense.

Because they usually have a lot of questions/exercises.

name of paper?

>>8113311
here's one of them, you can probably find the rest through references and authors

https://arxiv.org/abs/math/0502327

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>>8113308
Sounds Terry-ible

>2GOMAD

has fitness gone too far ?

>>8113274
stay on topic plz

with that much milk he won't even need a bulletproof vest