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Archived threads in /sci/ - Science & Math - 173. page
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So every element in our solar system that humans have ever seen came from the star before the sun right?

But that star was quite small.

Is it possible one of those absolutely massive ones can make elements we have never seen before?

It would have millions of times the gravity etc and pressure etc

Thoughts /sci?
>>
Actually the heavier elements weren't created by our sun. Heavy elements are created in the stages before a star goes supernova, and dies. Then during the nova all that material is flung out into space, and eventually some of it ended up here, and we built guns to kill each other with it.

To answer the second question, probably not. Odds are that if that could happen, it would during such a supernova, and then it already would have, since such massive stars have such short lifespans.
>>
does OP say that there already was a star in our system before our sun was even born
>>
>>7740720
This is the definition of star generations. 1st generation stars can only contain hydrogen, helium, and a tiny bit of lithium. Only later generation stars can contain heavier elements.

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What are the top 5 most difficult math or science classes ever in the history of post-HS academia (undergrad-doctorate) that one can take.

Also: assume this person goes to an elite school (Harvard, Cambridge, *Insert super smarty fancy elite school in Europe or US*)
>>
It really depends mate typically any higher level maths and physics course it difficult,
PDEs, abstract algebra, complex analysis, high level quantum mechanics, high level condensed matter physics, high level plasma physics, high level fluid dynamics etc
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>something something algebraic geometry something
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>>7740654
>high level quantum mechanics, high level condensed matter physics, high level plasma physics, high level fluid dynamics

define high level

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How good do I need to be at Math to be good and Computer Science?
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>>7740637
You mean CS, not programming, right?

For CS, you probably need to be pretty decent at math. I.e. you've made it through linear algebra and other upper level maths. For programming, you just need like fucking pre-calc or some shit.
>>
personally i think it's not the math itself what you need, if not the mind that allows you to be good at math...
>>
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>>7740637

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Is diff geo really interesting if you aren't into physics?
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>>7740586
>not liking GR
fuck off
>>
>>7740589
^This
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>>7740589
>typical autistic manchild who majors in physics

Being the middleground sure makes you stupid.

Either you go full practical into engineering or you go full abstract into pure mathematics. Middle grounds are for retards like you who think anyone cares about their retarded little theories about big objects.

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Best place to find scientific journals if I don't have uni access?
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>>7740492
is sci-hub still on?
you could ask here or on reddit/r/scholar
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>>7740492
Scholar
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>>7740492
i have uni access, how do I access scientific journals?

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>>
>>7740471
i am not gonna ask you anything simply because i'm jelly of the enormous bribes you get
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>>7740480
bribes? tell me more
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What's it like knowing your two fields of decent specialization are on entirely different levels of development?

explain to a normie why the internal combustion engine has so much going for it, there must be a false equivalency here.
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>>7740178
Computer technology has gotten a lot better, but also a lot cheaper. Alternative energy technology is still very expensive and therefore not practical.
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>>7740178
You keep spamming this thread fuck off.
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>>7740178
Progress in computer technology and engine technology is not that different, in both cases the basic functioning principles have remained the same but newer technologies made the products cheaper and more efficient (also smaller in the case of computers). Today's car engines are quite different from the first internal combustion engines.
Also, we realised that progress in electronics can make car engines more efficient (there's a reason why every car nowadays has an on-board computer) while the reverse...

I'll start. Pic related, how do I do this I realize that
$V=-\int \vec{E} \cdot d \vec{l}$
But that's all I got
>>
How is energy conserved in special relativity?
If you have a system containing two moving objects with one having a mass that is much greater than the other's, would the energy be the same regardless of which object's frame of reference you are in?
>>
can someone recommend me a youtube channel to teach myself the first semester of Physics with calculus?
>>
Does anyone know how to make a LOCK out of paper? It doesn't have to resilient. Just a lock that you have to enter a combination somehow to make it unlock?
Maybe a paper bent in half with locks made out of tiny paper strips with strings on them?

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25 / 5(2+3)

I'm told the answer is one
What does sci think?
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1. we solve the parenthesis
25 / 5(5)

2. we solve the Exponents
-

3. we multiply
25 / 25

4. We divide
1
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>>7740056
How can you post pemdas and still fuck it up
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>>7740025
distribute first
25 / 10 + 15
then divide
2.5 + 15
17.5

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/sci/ can you help me, I'm not a native english speaker... How do you call velocity Vo in english? I know that omega\times r is relative velocity, and that V is absolute, but what term do you have for Vo?
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V not is how it's pronounced
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>>7739975
V naught* you filthy animal
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>>7739976
>>7739975
I thought that naught means that something is in its initial state. This is velocity of the point O with respect to a fixed reference frame, So it is not same as the initial velocity (this is formula for an absolute velocity of point M)

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Is it possible to construct a system of ethics purely based on math (logic)?
>>
Is +ve number better than -ve number?
Is higher complexity > lower complexity?
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>>7739956
No, ethics is a human concept after all.
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>>7739987
So is math.

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What is the biological purpose of schadenfreude? Why does it make me laugh when someone gets hurt? Just recently I lol'd my ass off when I heard my neighbor had cancer. I barely even know that guy. Really wondering, at what point in evolution did schadenfreude develop? Can monkeys laugh at other monkey's pain?
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>>7739941
Being happy that you are healthy? making it seem valuable to be healthy from a biological standpoint I guess.
>>
Never heard of the term but laughing at others unfortunate events is a coping mechanism. As the other anon pointed out, it gives you perspective on your own health. Additionally it negates your urges to worry or think about how bad it would be to have cancer and be told you have 1 year to live. You can just laugh, be labelled as cruel and move on with your day instead of being labelled as death row.
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>>7739941
>Just recently I lol'd my ass off when I heard my neighbor had cancer.

Wow that's pretty edgy. I imagine all the sharp edges could help defend against predators.

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What field of study ISN'T a meme these days...?
>>
Nanotech and Materials
>>
Any engineering field or mathematics.

But mainly, do what you want that is economically viable to pay off your debts and help you remain self sufficient.
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>>7739874
None. Studying IS a meme.

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According to news reports, the temperature in one part of Colorado has dropped to -51F (-46C). While much of the east coast is experiencing short sleeve weather, the drop to -51F is rather extreme even for high altitude Colorado.

Am I missing something in the news reports as to why it can be that much colder at this location other than altitude? Is there perhaps a microclimate that reinforces the low temperatures? According to Wikipedia, the area in question...
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>>7739863
>Fahrenheit
Why?
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>>7740159
(F - 32)/1.8 = C
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>>7740159
Because it sounds so much better.

I'd rather hear 80 degrees than 27 degrees. It sounds so much comfier.

Same with feet and inches. I'd rather hear "X foot X" than "X cm"

This is why Europoors are always upset. They lack the comfiness.

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When did you realize that you weren't smart enough for a career in math? INB4 calc 1.
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>>7739752
Probably either complex analysis or Algebraic Geometry II.
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>>7739757
i fucking hate ellipsoids, hyperboloids, and such
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>>7739752
I realized I was too smart to waste my time in a career in math when I had my first company idea.

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