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Archived threads in /sci/ - Science & Math - 499. page

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Can anyone recommend this brainlet a history of mathematics book?
13 posts and 1 images submitted.
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>>8937546
probably numberphile on youtube
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Why would you study that?
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>>8937555
Its interesting

Are Algae plants?
12 posts and 2 images submitted.
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some
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>>8937398
I think they're sponges.
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>>8937398
No they're algae

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to find the composition of an RNA molecule?

I've taken pic related from Wiki and summed up all elements (plus the ones that make up the ribosome) and come up with this:

C5H15N5O18P2

but that doesn't seem to be the answer, so which is it? I've tried looking for RNA in pages where they tell you the composition of molecules, but they apparently make a fucking exception with RNA

pls respond
16 posts and 3 images submitted.
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>>8936290
Please reread your book or stop trolling
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>>8936290
Anon, RNA is not "one molecule". It is a chain of ribose molecules linked together via phosphate groups, with a base (Adenine, guanine, uracil or cytosine) attached to the 1' location of each of the riboses.

Chain lengths can vary and base composition also varies, so it wouldn't make sense for there to be 'one composition'. Usually, non-repetitive polymers like DNA, RNA and proteins are written down as a linear sequence of their components.

Just, fucking, read the wikipedia page or your textbook holy shit.

Also, the 'ribosome' and the 'ribose' are two different things. The ribosome is a piece of cellular machinery and the ribose is a sugar molecule.
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>>8936333
all races are equal

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how do I prove this? (linear)
||u+v|| < ||u|| + ||v||
using Cauchy Schwarz
18 posts and 2 images submitted.
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>>8935899
Im guessing counterexample, c'mon bro that's textbook
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>>8935901
can't. has to be generalized.
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>>8935902
what fucks me up is that
<u+v,u+v> = <u,u> + 2<u,v> + <v,v> which is > than <u,u> + <v,v>
so how can their magnitudes be smaller
logically it makes sense to me but the math is fucking me up

Is synthetic marijuana that bad?

Was the guy that caused the car crash in Times Square under the influence of these drugs?


http://www.sciencedirect.com/science/article/pii/S0165614716301857
Synthetic Pot: Not Your Grandfather’s Marijuana

http://journals.lww.com/nursingmanagement/Fulltext/2017/03000/The_emerging_threat_of_synthetic_cannabinoids.7.aspx
The emerging threat of synthetic cannabinoids

http://www.sciencedirect.com/science/article/pii/S0967586816307731
Buzz Juice: Neurological sequelae of synthetic cannabinoids
12 posts and 1 images submitted.
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>>8935593
I have no personal experience with it but my understanding is that "synthetic weed" could be any one of several chemicals, some of which may not be that bad. But it's not sold for human consumption so they basically have no responsibility to actually tell you what it is. It could be bad.
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>>8935593
They're basically research chemicals that resemble the thc molecule but have totally different effects

One friend of mine told me he tried it once (unwittingly) and it made him feel full on psychotic
>>
https://youtu.be/mhV2n0Mlucw

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Well?
49 posts and 7 images submitted.
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>>8934998
diphantone equation thing so really fucking big
natural numbers
qed.
like really fucking big numbers
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>>8934998
https://mathoverflow.net/questions/227713/estimating-the-size-of-solutions-of-a-diophantine-equation

Then multiply the whole thing by 4.
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>>8935034
>Then multiply the whole thing by 4.
explain how multiplying a, b and c by any common factor will ever change the value of that expression

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It's a simple one, just use latex suit to confine water and air flow. Enable them to clean your body and keep your body in a comfort temperature. The aim is using this suit to make travelers no longer have to carry a lot of clothes and of course don't need to wash them. And they Don't need to take off the suit everyday because the suit don't get dirty and can wash your body.
Furthermore, the suit has a air conditioning. You don't need hotel any more. You can sleep wherever you want as long as you can find a socket and feel safe. In the end, this suit may replace house or apartment in some very crowded cities or become a first layer of some exoskeleton system.
I did managed to creat a few .stl files by solid works . But I'm not a professional designer or engineer. I'm just a first year IT student. I do have a proper solid work skill but i have completely no idea on what's next.
How can i make this happen?
66 posts and 15 images submitted.
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is this a joke?
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>>8932353
>hey can you help me make this product that I plan to sell even though I don't know any of the science needed and you would be doing all of the work and also I won't pay you
Why should I not just make this myself?
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>>8932353
>>8932378

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Everything has a cause and an effect, right? So, why do things exist? I mean, yeah, everything started with the Big Bang, but what caused the Big Bang? You can say it was other Universes crashing into themselves, but then, how did those former Universes came to be? Some say they have always been there and everything is cyclic, but doesn't that ruin the laws of causality? If not, how did that cycle came to be? It can't have always been there, and it can't have just came to existence out of nowhere. So to me, if our current framework is correct, then things shouldn't exist. There's no reason for timespace, energy, matter and everything else to exist. Things shouldn't exist. But since they exist and assuming the laws of cause and effect are true, then it suddenly makes perfect sense to admit that an almighty mythical creature like God exists and He's the one running this show. The final possibility is just that there's something inherent to the human thinking that makes us think everything has a cause and effect. If we are wrong, then suddenly the models we propose make sense, since we're just mistakenly assuming everything has cause and effect. But then, how did science get here in the first place, when one of its fundamental principles is cause and effect?
57 posts and 6 images submitted.
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Somebody clearly hasn't seen "the entire history of the world, i guess."

>https://www.youtube.com/watch?v=xuCn8ux2gbs&t=

You're welcome.
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>>8931023
1. Which god?
2. Out of the thousands invented, how do you know it's that particular god?
3. Why does that god exist?
>>
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>>8931043
Look. I already watched this video. The very idea of a Big Bang doesn't make any sense. Was it a nothing that somehow became an everything? Or was it an everything that was always just there somehow? If the former, what made nothing become everything, and if the latter, what created this every thing that was always there? This doesn't answer any point in the OP at all. Cause and effect.

any biology majors here?
is it true that'll i need to get a masters if i wanna get any chance of landing a job. more interested in microbiology if that helps.
20 posts and 1 images submitted.
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>>8935293
Only if you wanna get an actual research job where you're not just a lab monkey pipetting stuff but rather participate in original research under a lab head. This is how it is with all science degrees, the real jobs are available to the PhDs and postdocs that can later become research assistants.

Lab monkeying is about the most realistic job choice you have with only a bachelor in the life sciences if we're talking scientific jobs. But you should know by now that repeating the same braindead experimental protocols every day is extremely tedious. If you enjoy it though, go for it. Most people think PhD when they imagine research, however.
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>>8935293
>Microbiology
>>8935332
This hit the nail on the head.
Field bio has the best research options for bachelors, you'd still be an assistant. Unless you are skilled and good at networking, then you can bullshit your way to higher postions(which will probably be a postgrad research program)
Jobs are lame, don't buy into the corporate dogma. Aim to become a researcher or drop out because you will hate your life doing capitalized science.
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>>8935341
What's wrong with doing SCIENCE?

Neil Degrass Tyson--hack, physicist or something else?
20 posts and 5 images submitted.
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>>8933598
Hack and fedora.
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>>8933598
A nigger?
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he's mostly an entertainer and partially a physicist

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What does /sci/ think about the ASTROMASTER 130EQ-MD? Is it there a better reflector around it's price?
13 posts and 4 images submitted.
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it's garbage
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Get it without the motor drive, the motor drive mount is garbage but the standard EQ mount is great
Overall the scope is good and I adore mine
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>>8936941
Had one after falling for the stargazing live meme and sold it.

Was great for the moon, shit for everything else.

>ahh yes Mars is a very slightly red dot
>ahh yes stars
>this is boring

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The Catholic Church is now more scientifically aware than the US Presidency.

How does this make you feel?
11 posts and 3 images submitted.
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>>8936890
not surprised
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>>8936890
I can see this blowing up /pol/
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>>8936890
Well, one of the founders of the Big Bang theory was a priest. I think the Catholic Church has always been more aware than the Presidency.

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I read that there isn't a unified theory of everything. Is that because there's some lurking misunderstandings in our rules/knowledge of the universe, or is it because tying multiple (correct) bundles of rules together is tricky work?

tl;dr
>Do we know everything there is to know about the basic nature of the universe/what'll happen to it/etc and are just operating within our known bounds for optimization in technology now?
12 posts and 1 images submitted.
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We know very well how reality functions on a macroscopic scale and we know very little on how it functions on the smallest of scales.
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>>8936835
That's odd; you'd think so much uncertainty (pun not intended) on a quantum and below scale would make for very big discrepancies in macroscopic scale projections.
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>>8936893
the classic analogy is like rolling a dice

roll 6*10^30 dices (die?) and you're going to get 10^30 1's, to many decimal places -- if this was something in the real world that you were measuring, it's going to be close enough to 10^30 that your sensors aren't going to be able to tell the difference.

Meanwhile, roll a dice once, and try predicting what you're going to get, or why you got it. Absurdly complicated.

All the "quantum fluctuations" effectively end up cancelling each other out on macro scales due to law of large numbers

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Why did ours develop so much?
16 posts and 4 images submitted.
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>meaningless question
We can only observe that it did
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cooked meat
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Honestly my opinion is to better predict the future, which is literally one of the most advantageous aspects of being alive.

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So i'd like your honest thoughts on something /sci/, ill start with story/effects.

>be me, take ~30 hits of LSD
>nod off without tripping (within 10 minutes)
>wake up, recollect only my death/being in hell
>in hospital, police found me, fines ect

ever since ive had these effects
>hyperrealism in dreams down to smell
>random 'false memories'/events that couldve happened in that moment pop up in my head (an example is I live in the woods (in a house) and people shoot guns, see bullet travel, hit me in head, i die, all in third person in that instant)
-drinking makes me be able to feel all my organs working, like literally feel them, prior it did not
-Also prior to the experience I never had a dream/couldn't imagine anything whatsoever, now like i said my dreams are hyperrealistic, I have all sensations almost as if its just another me
>still very little recollection of that night
>sometimes ill catch myself in a hardcore daydream where I am talking to another person (out loud, in real life) or making gestures ect, this includes replaying moments back in my head with near 100% accuracy

Tell me whats wrong/right with me pls

>pic unrelated, its all I have saved
15 posts and 1 images submitted.
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Sorry about the half greentext, half not I was busy daydreaming and forgot I was greentexting
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>>8936574
What does the functioning of kidneys feel like?
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>>8936576
Its like a small suction feeling, almost like if you put a straw on the end of your finger and suck on the other end.

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