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Archived threads in /sci/ - Science & Math - 1825. page

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So imagine you want to go back in time to see the Ancient Egypt because who wouldn't want to see that. So you get into a time machine you've just built and go back 4000 years. Instead of Egypt you end up floating somewhere in space because because the planet and even the galaxy is inconstant motion.

Will this scenario be possible? I feel like the "back in space" is always overlooked in sci-fi movies. They talk about moving back in the past but why never mention that moving through space is needed as well and that you could actually fuck it up and end up floating somewhere in space 4000 years in the past?
25 posts and 3 images submitted.
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You're constantly moving forward in time, yet you don't float off into space. Why would moving backwards in time be any different?
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You're thinking of it as if you'd be in the same 3rd dimension while time traveling. Theory has it that time travel would be towards 5th dimension in which you can see time as it is and place yourself in any time.
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>>7954078
Well, I kind of thought about it . I think we don't float off in space because we're in the now so it's impossible because of gravity but if you went back 4000 years the earth wouldn't be in this exact position so... you'd be floating.

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Do you have kids /sci/? What kind of education did they have? If you don't, what kind of education would you want your kids to have? Do you think you could raise them into a prodigy?
25 posts and 4 images submitted.
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> do you have kids /sci/?
jesus christ more than half of us are still in highschool and begging others to do homeworks, other half are still in uni or recent unemployed graduate NEET faggots. Getting married isn't even on the list.
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>>7953924
This.
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>>7953924
I have been here for too long

There are more LSD molecules in this square of acid I just took than there are stars in our galaxy.

Holy shit
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And there are more positrons in space than there are protons in the universe
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Enjoy your trip friend. Stay off the Internet though.
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>>7953922
I didn't actually take any LSD though

It's just b8 :(

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>mfw I found long division with decimals harder to learn than quadratics, trig, and calc 1.
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>tfw trig was harder for me than every single calc class
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>>7953829
>tfw I found K-theory harder to learn than L2-invariants, quantum goups and differential Galois theory
A-am I a ... brainlet, /sci/?
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>>7953846
No autistic is the correct term

Are you all just meme /sci/entists or do you actually know something about a subject you speak about?

Is there anyone brave enough to say something about the uncertainty principle or any other popular /sci/ subject? I will then decide if you are a living meme or a true human bean.
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>>7953796
>Are you all just meme /sci/entists or do you actually know something about a subject you speak about?
yeah, I know your mom pretty well.
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What subject I like most is nature's play between mathematics and physics. Wherever the two delineate it's got to be an answer within the realm of creation. But to what affect. Is the answer hard to figure out as math is labyrinthian? Where do integers start for instance? 1? Why do we picture numbers alongside mathematics before we even start actually using math?
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>>7953820
well meme'd

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"was astounded by the intensity of his study schedule. “His habit was to do 36 hours or more at a stretch, collapse for 10 hours, then go out, get a pizza, and go back at it,” he recalled"
How does Bill pull this off? Is this even remotely possible? How does one even reach this level of mental endurance?
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>>7953755
Based on the evidence you've presented I can only conclude that pizza is the universal panacea.
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Like all successful people, he probably abused stimulants excessively in his youth. Now in his advanced years he's suffering the chronic effects of his old habit. As his cognition and self-awareness decline, his dying brain lashes out in odd ways such as donating a large portion of his wealth to promoting Common Core and various other bizarre religions.
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>>7953763
Nice bait, got me to reply

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Hey. I'm looking for an inexpensive process to synthesize a sturdy material from bacteria, plants or fungi.

What species do I need? How do I extract the compound from the rest of the organic matter? Does the compound need to be heated or treated in any way?
Thanks :D
19 posts and 1 images submitted.
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Materials scientist here. What the fuck is "sturdy". Bacteria don't just shit out metals, ceramics, glasses, etc.
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Also, why are you insisting on using bacteria? That has to be the worst way I've ever heard for producing materials with good mechanical properties.
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>>7953722
i was trying to get a compound first. and then treat that compound with a heating process or something. i was hoping that would make it sturdy.

i'm just looking for something as strong as balso-wood or less strong

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>Instinct is inextricably bound to unreasoning impulses, and today we clearly see its true nature. Instinct has just become aware of its irrelevance, and like a cornered beast, it will not go down without a bloody fight. Instinct would inflict a fatal injury on our species. Instinct creates its own oppressors, and bids us rise up against them. Instinct tells us that the unknown is a threat, rather than an opportunity. Instinct slyly and covertly compels us away from change and progress.
>Instinct, therefore, must be expunged.
>It must be fought tooth and nail, beginning with the basest of human urges:
>The urge to reproduce.

Breen's Schopenhauer-ish thinking makes an awful lot of sense, actually. On the hypothesis that IVF could become standard procedure for reproduction, would eliminating sexual urges genuinely improve the human condition?
25 posts and 5 images submitted.
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No.
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No. Instinct (including sexual urges) is only bad when it leads to horrible consequences. But it's wrong that instinct should be eliminated completely.
For example, instincts such as urges to murder should obviously be eliminated, or, at the very least, controlled (be it via punishment or, if appropriate, the use of special tranquilizing chemicals for those who committed murder)
But instincts which are good, such as our natural curiosity and the will to explore, and to care for one another shouldn't be eliminated.

Half-Life 2 was a very cool game though, and Breen's speeches were produced very well and are of high quality. They show how far one can get with pure rhetoric and sophism. Breen uses a form of rhetoric called ethos. He tries to make himself seem like some kind of a representative of rational thought and science, and make people respect and obey him (and the combine, who are his puppet masters).
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......

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College dropout reporting in.

What are electrons? Can you explain it to me in the most honest and literal way possible?
14 posts and 1 images submitted.
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https://www.reddit.com/r/explainlikeimfive/search?q=electrons&restrict_sr=on&sort=relevance&t=all
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>>7953464

That's why I asked here.

I know what would they tell me and I find that confusing.
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http://www.chem4kids.com/files/atom_electron.html

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So I'm reading a lot about the curvature of the universe lately and I'm trying to work something out.
3D flatness is easy to conceptualise, of course it's how we experience 3D space.
Positive curvature is analogous to the outer surface of a sphere; it's convex. That's fairly simple as well.
But negative curvature is always represented by a saddle shape. I would have thought that negative curvature would be more like the concave inside surface of a sphere, like a bowl.
Is negative curvature actually concave in one axis and convex in another like a saddle?
28 posts and 3 images submitted.
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> negative curvature
What the hell is that ? Curvature is curvature. There are concave and convex forms, is that what you mean ?
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>>7953392
The angles of a triangle on a sphere is the same no matter if you are looking outside than inside.
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>>7953395
of course, I hadn't thought of that.
>>7953394
"positive" and "negative" are the terms that are used the most in terms of the shape of the universe. "negative" curvature is usually describes as a saddle shape

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Good luck loves

1
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wtf is this?
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>>7953362

Minesweeper BC edition.

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give me one good reason we shouldnt all just saw off our legs and replace them with myoelectric wheels.
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Because it's fucking retarded idea, that's why.
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>>7953315
Stairs
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>>7953349
fuck. Well we can all just use ramps now.

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i made a hypercube!
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>>7953300
good, now shove it up your arse
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>>7953300
You look very feminine.
Post crossdressing pictures.
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>>7953396
fuck off weeabo faggot

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If Godel's incompleteness theorems are true, then how can we make accurate predictions about all of the physical properties of our universe, given that the mathematics physics is based upon is inconsistent?
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>>7953019
It's not inconsistent you popsci faggot.
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>>7953019
You're a fucking idiot lmao
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>>7953048
Today the mods made me smile.

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Hi.

Why do we need proof of the Cauchy-Schwarz Inequality? Why couldn't the statement be accepted as a [word for statements which didn't require proof when they were first stated such as shortest distance between two points is a straight line] like most other obvious things?
14 posts and 1 images submitted.
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>>7952985
>word for statements which didn't require proof when they were first stated such as shortest distance between two points is a straight line

Surely there's a word for that thought
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>>7952985
One of the requirements for a norm is that the Cauchy-Schwartz inequality holds. For something to be a norm you must show that the inequality holds.

If you're talking about absolutes in Analysis, then it must be proven because you can't just assume the absolute value is a norm. Once you just start assuming things, you start fucking up your math.

Shortest distance between two points is a straight line is something that needs to be proven. You can come up with geometry where that is not true. That point highlights my point that things need to be proven, no matter how "obvious" it might seem to you.
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>>7953160
>norm
You're confused about what this word means

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