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Archived threads in /sci/ - Science & Math - 12. page
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>>
extinct
>>
Blacks, abos and inuits?
>>
>>8530297
My answer? I'd say, WOW, reminds me of something I discovered recently related to evolution: The main story people want us to believe is that 4-6 million years ago, humans didn't exist, and that we had a common ancestor with a chimpanzee. They say that this "wan't a chimp" but that it also "wasn't a human." So that means it would have to have features of both. The problem is, chimpanzees don't have features of both, and humans don't have features of both. If humans...

Which of these accidents was worse?

It is my understanding that the Chernobyl core melted out of the containment vessel whereas the Fukushima cores did not, is this right?

Why did the Russians manage to fuck it up on there end so badly? Were building standards really that primitive compared to what we have today?
>>
Open. Chernobyl is stable, Fukushima is not.
>>
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Chernobyl was worse. The type of reactor in Chernobyl doesn't really have a containment vessel, so when it blew up the reactor core was out in the open. The graphite in the reactor caught fire and the smoke transported radioactive material high into the atmosphere, allowing it to spread over a wide area.

I don't know as much about Fukushima, but AFAIK the reactors shut down after the earthquake, but the cooling system was destroyed. That means that a lot of hydrogen gas is generated in the still hot reactor, and they had to vent it out in order to avoid an explosion....
>>
>>8529403
Chernobyl was by far worse but this is also true.

Give it 30 years and ask again I guess.

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Does $10k earned by doing EE/Comp EE/Math/Physics have the same value as$10k earned by some instagram model with 500k followers for posting a fitness ad?
>>
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Well let's see:

$10k=$10k

See this OP?? it's the same fucking thing, money is money it doesn't matter how you earn it weather it's through math or sucking your boss's dick it will still have the same value because IT DOES NOT FUCKING MATTER.

Now stop crying about how you don't have a vagina just so you can get money from instagram and start accepting reality as it is faggot.
>>
>>8529192
Yes. 90% of researchers contribute with nothing at all, and their papers never get read by anyone.
>>
>>8529192
Depends whos asking and perceiving and how u influenced others and the emotional and mental with scientific combination and well being lol

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Picture is of a giant strip mine where they try to locate isolated pockets of ore containing only 1000 ppm uranium. They have to destroy the environment worse than coal mines to extract the fuel.

That mining equipment runs on oil and to transport and refine the ore is also completely oil dependent and extremely fossil fuel intensive.

The byproduct producing nuclear energy is one of the most toxic substances humans have ever created and there is no way to safely dispose of the waste.

How the hell does anyone think this is in any way a good solution?
>>
It's scientific - jobs
It's not very efficient - more jobs
Requires a lot of research to (possibly) be able to clean up the waste - guess
>>
Why does the government insist on 100% employment?

Where does the extra +15% money spent on sundays come from?

Would there be another +50% spent if all shops were open 24 hours a day?
>>
Is inflation just a cover for ever-increasing inefficiency?
Why should money earnt earlier (when things were presumably less efficient) devalue?

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How do these things work?

It just doesn't make any sense... wtf
>>
Sometimes I look in the freezer and notice the ice in the ice maker is taking on shapes different from when the ice has just been freshly made. The ice chips melt a little bit and refreeze and melt together.
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>>8528512
Our planet's goddamn beautiful isn't she?
>>
>>8528512
What's the conundrum - what's your actual question?

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of all time?
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>>8528261

shes got a sexy cat eye look
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>>8528264

that's a boy u dope!
>>
>>8528267

no homo

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You're stuck in open water. What happens?
>>
You drown yourself in the water and end all the pain
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>>8527191
hopefully a tide carries you to a island with fresh water.
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>>8527191
Die a quite painful way

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>Scipione del Ferro (6 February 1465 – 5 November 1526) was an Italian mathematician who first discovered a method to solve the depressed cubic equation.

>There are no surviving scripts from del Ferro. This is in large part due to his resistance to communicating his works. Instead of publishing his ideas, he would only show them to a small, select group of friends and students.

>It is suspected that this is due to the practice of mathematicians at the time of publicly challenging...
>>
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>math duels
>secret math
can we revive this?
>>
>>8527074

You laugh, though the exact reason for your laughter is not perfectly clear. And yet there are certain very good, perfectly legitimate reasons for del Ferro's secrecy which were not only explained in the blurb, /but which remain true and relevant today/. Specifically, the fear of getting scooped. Cardano scooped Tartaglia, who was similarly reticient. This is one of the great all-time scoops in the history of science.

Of course, the best way to avoid getting scooped is to publish first. But even this...
>>
>>8527452
>discrete math

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cmon /sci/ solve it, and proove that youre not a brainlet.
>>
>>8521666
I love you Destiny
>>
the
cube
is
not
in
motion
>>
>>8521666
It's prove, not 'proove', you fucking brainless monkey.

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Who /CommunityCollege/ here?

Since I know 60% of you fags go to one, why don't we discuss; what school you go to, and what University you plan on transferring into?

Also, general CC discussion. Also, this is a BULLY-FREE ZONE. Be nice.
>>
1. SBCC
2. Harvard University
>>
can you guys explain me what this community college shenanigans is all about?
t. not amerifat
>>
>>8521490
uni for idiots and poor people

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Is the direct relation between a society's technological advancement and social anxiety in that society's children the biggest detriment towards humanity advancing as a whole?
>>
>be liberalet
>post no source
>>
>>8532340
Yes, just look at the /r9k/tards
>>
I think technology works as a catalyst for social people, meaning that those who are naturally social are even more so, widening the rift between the social and anti-social.

I don't think this is necessarily a detriment towards human advancement. In fact, many of the "smartest" people throughout history have tended to be anti-social or marginalized from society, or at least capable of deep anti-social activity. I think this video touches on that a little bit: https://www.youtube.com/watch?v=Ym6whrAw8wU

If "genius" is truly innately inclined...

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Should I? I want to do it, but not to make myself feel good or superior or anything, I just want to learn more related material for when I go to grad school.

My main major is physics, but I also have a chem BA (because I used to be a chem major and switched when I was most of the way though (still gotta finish last two classes tho)). From what I've heard from you faggots, a math degree is essential to go on for a physics MS or PhD so now I feel like I have to stay on for another year to prepare my jewish asshole from graduate professor's throbbing nigger cocks...
>>
>>8532040
Sorry, talking about triple majoring and adding on a math degree in my fifth year of undergrad, forgot to include the expo
>>
Currently physics MS, you don't need to be a math major. Can you do calculus? If so good, that's a large chunk of the bitch work. Take a math physics course, work hard and put some effort into knowing basic linear algebra, differential equations, you'll be fine. Yeah, the further you go into theoretical, the higher the math you'll need, but you don't need to do a degree just for that. Wanna know what my undergrad degree was? Fucking psychology, if I can do it, so can you.
>>
>>8532040
>From what I've heard from you faggots, a math degree is essential to go on for a physics MS or PhD

Holy shit you've heard so wrong.

You know why physics requires you to do some math classes? Because those are the math classes you need to do physics. Everything else goes way beyond.

You are going to sign up for math and be fucking constructing the reals in set theory and you are going to ask your professor "How do I apply set theory in physics"...

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I know this is probably a common thread, but I'm wondering what is a good book for Calculus?

I've just finished up Calc 2, but I want to re solidify my foundation. I have calc 3 next semester, and so I'd like to study up during winter break.

I didn't save any notes or material from my calc 1 class (I took it over a year ago).

>>
>>
>>8532045

are there any other suggestions, or is there a consensus around this text?
>>
>>8531993
The most common names I see here are Spivak and Stewart.

Went through calc 1 and 2 with Stewart myself. Not great for first learning, but probably all right for review. Problem sets are good and challenging.

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I have a Chem final on Friday and a Bio one the next day.

Whats the most efficient way for me to study? Study for both a bit each day, or study for one the first half of the week and then the other the second half of the week?
>>
Devise a way to cheat
>>
>tfw finished my chem final a few days ago
>tfw I did great

>>
>>8531968
Get the fuck off 4chan and do it.

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My eye has been irritated for two days and it's getting redder, is it pink eye?
>>
/sci/ - Science & Math
>>
>>8531983
Fuck wrong board
>>
>>8531966
I've never had pink eye, and I shit alot.
I don't understand how it's so normal in america, no one gets it here.
Feels good not being americunt.

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I'm sure there must be some physics college students aroung here.
Pic related is what I'm doing. I have to do experiments and then put them on paper. What is this called in English? Laboratory tests? Laboratory works? I just need to find more information on those and how I should work with the data I obtain.
If you know, I would appreciate any site that could help me improving these papers.
>>
>>8531953
Its called research.
>>
>>8531953
Holy shit that's ugly. Use LaTeX for fuck's sake.
>>
>>8531953
Fuck I hated doing those, now in last year theres no lab left thank god

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I'm trying to do a thing with matlab but can't find anything detailing how to do it.

I have ode113 integrating a function for a certain amount of time, and after it's done, I want to ask the user for some kind of input, add that to the output conditions, put this addition back into the initial conditions, and run it again

I'm fine with getting that to work, but my problem is that I want to "keep going from where I left off" aka. right now it would just overwrite my previous output vector and I want it to append the new data to the...
>>
I'm not sure if I understand your problem, but maybe you can use save() to save the variable into a file? And then get it back with load()

Check the docs if you haven't used those functions.
>>
Dont think that function can do that. Easier thing to do is save the old output in another variable and manually stitch them together yourself. You could write a wrapper for the solver that does it and just call the wrapper.
>>
>>8531929
not quite the problem, it'll make more sense if I explain to you specifically. Basically you have a spacecraft moving with some initial conditions under the influence of gravity, then after a certain amount of time waiting, the user can give it a new velocity (presumably a rocket engine firing), and a certain amount of time to wait and it'll move as it's supposed to (again only under the influence of gravity) until the user is queried again
>>8532008
ah...

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What's the better indicator of a girl's physical readiness to have sex: the presence of boobs and pubes, or menarche?

Many primitive foraging societies have some kind of rule or ideal that a girl shouldn't have sex until her first period, though these rules are probably no more "natural" than the age of consent in modern societies (which are often broken and I imagine the same happens in primitive societies). If menarche was the natural age of consent then surely we'd expect girls to have evolved to physically advertise that they've...
>>
If there's fluff on the muff she's old enough.

It's just common sense.
>>
Yes, and that's why girls sprout tits on their 18th birthday.
>>
lol this question

Say youre driving down the highway at 65mph with your windows down, when all of the sudden you drive through a swarm of migrating bees And a bee flys through the window into your car

Does the bee stay stationary in your car and move along with you inside, or does it splat against the inside of the back window?
>>
There's no such thing as bees.

Next question.
>>
As you're traveling at 65mph the wind in your car is gusting at 65mph. This will create an angry swarm of bees that can fly at over 65mph trapped in the same car that you happen to have tied/bucked yourself to. At this point the only thing to do is unbuckle yourself and jump out.
>>
>>8531433

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what the fuck IS implicit differentiation? How do you do it?
pic is an uninitiated
>>
good song is "I Don't Like the Look of It"-Lil Wayne, Nicki Minaj as payment
>>
>>8531285
and whoeva answers b a motha fuckin starboi/girl
>>
>>8531294
>>8531285
fuck off nigger

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So if monkeys and humans ((((share)))) 1 ancestor, so how come monkeys dont speak, light fire (they are scared of fire), use advanced tools or build bridges?
>>
Ur a monkey
>>
>Monkeys don't light fires
>>
>>8531301

y i could train my chihuahua to do that too

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now that the dust has settled, does consciousness creates reality?
>>
>>8531137
No, the universe doesn't go away when people die.
>>
>>8531139
This is correct.

It just goes away when I die.
>>
no retard

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Hello /sci/. I fucking hate Optimization, the topics are uninteresting and the lecturer is boring as all hell. However, I have to learn it sooner or later because the course is part of my curriculum. The topics are Linear Programming, Integer Linear Programming, P vs NP, and some graph optimization. What are the best resources to git gud? I have 6 weeks until the exam.
>>
>>
>>8531005
u tube has a full few course
there will be vids for every section in your book
it is your interest to learn the material as it is some of the most practical math you can learn as is numerical analysis
>>
>>8531615
Do you have a specific youtube channel in mind?

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>>
1) The incentives favour incremental advances of questionable utility over asking the truly difficult questions.
2) Statistics is hard, and most people don't get it. The people that do, generally don't do much empirical science.
3) Negative results are not published.
>>
>>8530868
>Statistics is hard, and most people don't get it. The people that do, generally don't do much empirical science.

Stats suck!
>>
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>>8530870
>>8530875
Corroboration, mainstream science is on the back-foot.

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how long does it take to recover from porn adiction?
>>
>>8530330
logarithmicly proportional to thr number of days away from it.

(Your mind) = (number of porn avoided)*lg(days)
>>
>>8530330
There's no such thing as porn addiction, at least not in the same sense as nicotine, heroin, alcohol, etc.
>>
>>8532225
addiction is a spectrum. just because there is no physiological dependency does not mean you can't call certain habits addictions. addiction is defined by a habit that impacts your life in an undesirable way

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Do all of the non-trivial roots of the Riemann zeta function have real part 1/2?
>>
>>8530008

Yes.
>>
>>8530034
>>
>>8530008

That's the million dollar question.

:^)

why did we devolve in every way except intelligence compared to monkeys?
>less durable
>less strength
>less agile
>shit feet
>>
>>8529610
>devolve
please dont perpetuate this meme. evolution is only change to fit a niche.
biologically speaking, millions of years of genetic drift produced incrementally smarter hominids, who were able to survive and reproduce more than those who were merely robust.
>>
>>8529610
Because evolution is random.
>>
To create balance in the universe. Evolution is there to create balance. If we had all the strength, durability, intelligence, etc then we would destroy everything and we would be the only ones on Earth. If we were the only ones on Earth then Earth will start dying then we would die and there would be nothing left on Earth.

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Is this book a meme? I want to go back to learning math and I have a copy lying around. I was wondering if it was worth my time or if I should use another book.
>>
a + 0 = a
a + b = b + a
(a + b) + c = a + (b + c)
a + (-a) = 0
a * 1 = a
a * b = b * a
(a * b) * c = a * (b * c)
Given a != 0, then a * 1/a = 1

ax + bx = (a + b)x
x^a * x^b = x^(a + b)
(x^a)^b = x^(ab)
If xy = 0, then x = 0 or y = 0

Here you go. No need to read that book. Just memorize that top group of rules, and if you're feeling up to it, the second group as well, but they can just be derived, so they're really not as important.
>>
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>>8529856
>a * b = b * a
[eqn]
\begin{aligned}
\begin{bmatrix} 1 & 2 \\ 3 & 4\end{bmatrix} \begin{bmatrix} 5 & 6 \\ 7 & 8 \end{bmatrix} &= \begin{bmatrix} 19 & 22 \\ 43 & 50 \end{bmatrix} \\
\begin{bmatrix} 5 & 6 \\ 7 & 8 \end{bmatrix} \begin{bmatrix} 1 & 2 \\ 3 & 4 \end{bmatrix} &= \begin{bmatrix} 23 & 34 \\ 31 & 46 \end{bmatrix}
\end{aligned}
[/eqn]
>>
>>8529868
>matrices form a non commutative algebra
>in other news water is wet

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By autistic mess, I'm talking about blissfull social unawareness.

The kind of shit that pushes people to do this kind of shit
>>8529155

You'd think people with powerful reasoning skills would be able to pick up social cues faster than any other individual. But it's not the case. Instead, they become social parias, known as 'nerds' or 'dorks'.

Why is it that academia makes people completely socially retarded and emotionally stunted?
>>
>>8529257
Social charm is an ability not learned from a text book but rather from real world situations.

Introverts would spend less time interacting with others and perhaps would have a stunted sense of charm.

There is also the fact that intellectualism might bore most social butterflies.
>>
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WolfieCindy
>>
>>8529257
You have it backwards.

These men and women are not socially retarded.

The "normals" are retarded and conforming to their favored social protocol causes intelligent minds to either suppress their intellect, for the sake of the cattle, which usually comes off as awkward unless they are especially practiced at this (I don't know why anyone would want to be), or they come off like self-aggrandizing jackasses whose sentences can't be understood by the troglodytes with whom they are trying...

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Why are scientists so committed to spreading the idea of climate change? I thought scientists wanted to spread the truth
>>
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Because it's happening you illiterate motherfucker, it's people like you that makes it hard for science to reach the general public.
>>
>>8522754
>>
>>8522754
says who

>>8522781
fuck off, groupie

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