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Archived threads in /sci/ - Science & Math - 1346. page

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Physics and chemistry accepted. I'll start.

Why is \pi sad?
cos \pi is negative
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Good joke
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This is a wonderful thread
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>>8386040
delet this

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Why has this cost $8 billion - and is that a price worth paying?
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Yes.
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>>8382826
fpbp, have a natalia
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>>8382802
NASA and the subcontractors incompetence/desire to keep sucking up tax payers cash. Im still not totally convinced it will launch in 2 years

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Why are people's IQs rising? Redpill me on the Flynn effect. Is it bullshit (bad tests)? Or some epigenetic shit?
64 posts and 5 images submitted.
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the government is spraying iq shit from planes
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>better diet/ more iodine
>greater access to education
>increasing familiarity with topics covered in IQ test through education and cultural habits
>>
>>8386082
>>8386084
actually pretty close.
according to youtube videos, the ammount of lead in hosing in the new houses has dropped to near 0. sure, its making a resurgence despite being highly illegal, but that's only in poor ppl's houses!
but hey, so are CFCs according to the latest research!

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>tfw I easily taught myself tensor analysis, differential equations, organic chemistry, analysis, complex analysis, abstract algebra, QM, and circuits
>tfw I have to start at community college taking tons of bullshit courses made of things I already know because I dropped out of high school (broken dysfunctional home ruined me, no money)
>tfw basically will be forced to transfer to middling state university because no money and nobody wants to accept a cc transfer student besides if they are forced to
>tfw people only care about the prestige of your college and not what you actually know (including on /sci/)
>tfw FORCED to take shit I already know

God college is such a fucking dumb meme. I want to pull my hair out.

Why is it in germany they just take a test and can get in anywhere? Here in america there's all these stupid extra-curriculars and whatever. If it was just on knowledge I would not have to deal with this contrived bs.

The university system is completely retarded. How can you defend this.
85 posts and 13 images submitted.
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>>8385158
It keeps out brainlets like you
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>>8385160
I am not at all a brainlet lol. I just had terrible life circumstances.

Not everyone has a rich daddy that pays for all his college admissions preening. Some of us actually have real life problems that get in the way of things.
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>>8385160
how is he a brainlet if he is equal in knowledge to a college graduate and just lacks the credentials

how does a piece of paper with a pretty stamp on it make you smarter

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Welcome to /CG/ - Chem General Vol. 1
Primarily for the purpose of discussing Chemistry, asking Chemistry related questions and showing off Chemsitry related pictures, videos or academic accomplishments.
318 posts and 39 images submitted.
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Why do I never undestsnd anything in class
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>>8366283
why tripfag lad
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>>8366337
So in 3 years from now, when this general has 60-70 individual posters a thread I can say I was the first

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So it turns out that the Falcon 9 was probably sabotaged by a competitor firm. This is appalling beyond imagination.

https://www.washingtonpost.com/business/economy/implication-of-sabotage-adds-intrigue-to-spacex-investigation/2016/09/30/5bb60514-874c-11e6-a3ef-f35afb41797f_story.html

http://fortune.com/2016/10/01/was-spacexs-rocket-sabotaged/

http://phys.org/news/2016-10-spacex-rocket-blast-probe.html
78 posts and 16 images submitted.
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>>8386493
>SpaceX vaguely considering a sabotage act in their investigation, which has by the way still failed to find the real cause of the explosion
>SPACEX WAS SAYBOTAGD ERHMAGERD
This is why this board is such bullshit
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Even if we manage to colonize other planets there's no hope for any world humans inhabit.
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>>8386498
>strong suspicions of sabotage
>makes an incoherent strawman argument in response
>calls the board bullshit

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Your favourite element? Let's see which element is the winner.
107 posts and 20 images submitted.
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>>8377787
Helium, because of alpha decay.
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>>8377787
Mercury is cool.
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>>8377787
carbon for life

"SpaceX propulsion just achieved first firing of the Raptor interplanetary transport engine"
>https://twitter.com/elonmusk/status/780275236922994688/photo/1

>3MN of thrust
>382 specific impulse
>30 MPa chamber pressure (highest ever for production engine
Jesus Fucking Christ.
328 posts and 37 images submitted.
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>>8371390

It's chemical fueled. Yawn. We have been building the exact same devices for sixty years, and it is just as inadequate for 'interplanetary transport' as it always has been.

We need 3000-12,000 seconds of Isp (or more) and meganewtons of thrust to make REAL spaceships.

Unfortunately, that requires nuclear pulse propulsion or Fucking Magic.
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>>8371394
>why aren't we using thing that doesn't exist yet instead?
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>>8371396
>>why aren't we using thing that doesn't exist yet instead?

Because we're afraid of it.

Not because it doesn't exist.

https://en.wikipedia.org/wiki/Nuclear_pulse_propulsion

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>tfw i use a,b,c instead of x,y,z in Calculus.

How evil are you /sci/
178 posts and 30 images submitted.
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>>8379998
I use random japanese characters
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>>8379998
I use newton notation and I never add the constant after integrating an indefinite
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D,L
d,l
different conventions?
surely there will be no confusion!

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Is Dark Matter the "luminiferous aether" of our time?

If no, why not? It seems the truth will embarrass many people in research.
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>>8384792
what if it's not matter?

sounds like they should have called it "dark mass".
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>>8384792
There's a lot of evidence for dark matter. If it turns out there's another explanation, nobody will be embarrassed. That is what science is, you make observation and try to explain them.
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>>8384802
>There's a lot of evidence for dark matter.
Actually there is no evidence of dark matter. It had never been observed.

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"The problem is energy... I thought we could solve that with a large solar panel array"

How are solar panels a good idea on Mars? They're heavy af so taking them there will be ridiculously expensive, and producing them there will require crazy mining operations to get the raw materials you need as well as factories to actually process these materials and make the panels. This in turn will also have huge energy requirements which will be very prohibitive if you don't have the solar panels there in the first place.

Furthermore, the intensity of sunlight at Mars is half of that at Earth, and there's all the dust buildup that you need to worry about too. Why not just use nuclear power instead?
141 posts and 13 images submitted.
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>>8378290
Yeah, solar panels will work just fine. They can spend the extra money to get them up there. This doesn't seem to be a cost-saving or money-making venture to me. If one company can get a real foothold on Mars that will lower costs from everyone else then it is a huge step forward for everyone.

Dust and half the sunlight isn't a real problem as demonstrated by the rovers. Nuclear is more hassle than it is worth at this moment. It may be good later on though. It is best suited for satellites and unmanned stuff at this time.
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Air isn't dense enough for wind.

Combustion fuels are to much mass and no free oxygen on mars.

There is a critical shortage of plutonium for RTGs. RTGs are only good at providing a small steady current for a long time. Plus the God damned hippies protest against them.

Uranium or thorium fission power plants are massive and need someplace to dump heat.
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Does launching a rocket require a lot of electrical energy anyway? I'm guessing most electrical requirements will be for life support systems.

I can't imagine they'd actually want to use EVs on Mars. For exploring a planet, you need the range, payload capacity and independence of a chemical engine. It's not like there's an atmosphere to pollute.

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>his favorite area of math is category theory
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its literally the comfiest
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>>8378830
spotted the analyst
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category theory is pure philosophy, not mathematics

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explain complex numbers to be like i'm a highschool dropout that found algebra hard
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extra component in other dimension
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>>8382040
Square roots of rationals do not generally exist in the sense of calculation. But you can model them as if they existed.

For instance, there is no rational which when squared is equal to 2. So when you do arithmetic with the square root of 2 you just have to carry it around as an uncomputed term. But there's nothing special about doing this with 2. You could also do it with -1.
>>
Think of it like this: counting numbers you learned in elementary school:
>0 1 2 3 4 5 6 (...)
Okay, now say there is an extra dimension at the other side of the 0, we call them negative numbers, denoted by a - character in front and they represent shortages for example. Our number line now becomes:
>(...) -3 -2 -1 0 1 2 3 (...)
Hmm, quite strange. When we take a square root, we can only really take it from a number >=0, since what number squared could ever equal a negative number, if (-1)*(-1)=1? Alright, let's yet again define a new number i^2 = -1 such that now, we can also take square roots of our newly acquired negative friends. Lets represent these new numbers as being orthogonal to the numbers we previously know, since it's basically like you're representing two different types of quantities (those that square to positive and those that square to negative). We now acquire
>....i....
>-1 0 1
>...-i....
and we are at what you now already know. So really, if you are comfortable with us expanding positive numbers to the negative numbers, you should feel comfortable expanding the real valued squares to the negative valued squares. Turns out this expansion has some really cool and useful properties, which is why you need to know about them.

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http://www.iflscience.com/environment/no-turning-back-as-earth-permanently-passes-co2-threshold/

What do you guys think of this? Fear mongering, or actual end of the world stuff?
175 posts and 31 images submitted.
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>>8380952

>permanent

So does that mean we don't have to hear liberals complain about climate change anymore since it can't be helped now?
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fear mongering, the problem with humanity is global warming it's pollution. We're being too wasteful and fucking up our land and water. That's something that's going to affect us much more than having warmer weather.
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>>8380952
>this value is mostly symbolic
sadly not the happening we're waiting for.

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What is your major/specialization and why do you love that subject?
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Specialize in industrial and municipal water solutions, love it because it's water how can you hate it and I am also good at it.
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Computer Science because I get to be in control, use my creativity, and I generally don't have to deal with the irrational apes that inhabit this planet and their social games.
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>>8379941
Majoring in math. I love math because it is comfy, I am good at it and presents a lot of opportunities for my future.

They also call me 'the mathematician' at my job and that's also cool.

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