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Archived threads in /sci/ - Science & Math - 151. page
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If the many worlds interpretation is valid, could we potentially dump all of our entropy into another universe and extract "free" energy without violating the second law of thermodynamics?
>>
They did this a few times on Stargate Atlantis. One of those episodes even has bill nye and neil degrasse tyson.

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>>8336699
Came here to post this.
>>
I don't think the second law of thermodynamics accounts for matter being pulled in from other universes, just the matter in ours.

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What are some decent websites such as Khan Academy that offer math and science help?
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>>8336579
>decent

That's where you went wrong.
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>>8336599
Yeah im noticing Khan Academy is shit. I need other sites or maybe i should stick with textbooks.
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>>8336612
>>8336599
What's so shit about it? I'm using it for math shit and HTML/CSS.

Was planning on looking into the science and stuff.

>Researchers always say that they are looking to recruit new grad students
>They can't make time to deal with their current grad students

Why do they do this?
>>
>>8336547
grant money
>>
>>8336547
I mean you're suppose to start being more self-sufficient, knowing how to learn the stuff you need to learn.
Other grad students have been the best resource in my experience.
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>>8336555
There's a difference between hand holding and being completely unwilling to meet with your students.

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So love's just a trick that makes us reproduce?
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>>8336504
No.
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>>8336504
d u h
u d h
h d u
>>
>>8336504
Yes.

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Recently I've heard that Tesla had some pretty outrageous designs bouncing around. We're any of them viable?
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>>8336367
The AC turbine seems to be fairly viable
>>
>>8336367
a bunch of his stuff is still classified material
>>
Tesla is the crowned king of meme science.

The few actual contributions he made to society were just continuing the work of previous scientists. That's completely fine, of course, because successive collaboration is the foundation of scientific progress, but he doesn't deserve the idiotic amounts of praise that get heaped on him. He was also a pathological liar. Read through his notebooks: they're filled to the brim of elaborate descriptions of experiments he clearly never did and wild claims of his abilities, like his "I built a tiny earthquake device...

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>basic research
>you have to pay to access the paper
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>>8336307
>what is sci-hub
>>
>>8336307
Use sci-hub, or email the authors.
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>>8336312
>email the authors
>email profs too
They don't usually respond if they do your waiting atleast a month

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What is /sci/'s favorite writing tool when doing science? I'm shopping for pens and need suggestions.
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latex
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>>8336210
>le rare pepe

>>>/reddit/
>>
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>>8336229
>le anti-frogposting
>>>/lgbt/

Why the fuck does spinning send things upwards?
>>
haha this is simple
entropy
>>
>>8335988
I am goung to kull yu
>>
Seriously why

What are you doing to change the horribly unfair gender disparity in science?
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lowering points of the male students in my ochem course and giving females extra credit, making sure there's a bimodal distribution of grades where the upper quartile is only females and lower males
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>>8335918
He did reduce the proportion of sane-to-insane people in physics, that's for sure.
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>>8335918
There's nothing to do, females have the same access and the same treatment.
Just go to r9k or something.

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I just wanted to remind you all today that before you start calling other posters dumb that you are ALL brainlets.

My mind is like a hive with thousands and thousands of bees. Each bee has a brain just like yours.
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>>8335888
>claims to be smart
>can't spell his own name correctly
good job buddy
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>>8335888
>dat shave
just
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>>8335888

And without all the brainlets to support you, you'd be nothing.

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How many of you autists ARE NOT positivists? And why not? I bet some of you have been espousing positivism without actually being aware of it as a philosophical position or of the many arguments against it.

>Positivism is a philosophical theory stating that positive knowledge is based on natural phenomena and their properties and relations. Thus, information derived from sensory experience, interpreted through reason and logic, forms the exclusive source of all authoritative knowledge.[1] Positivism holds that valid knowledge (certitude or truth)...
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>>8335844
Then where do you go when you want to find out how the world actually is? Metaphysics?
>>
>>8335844
It's well-known since the fucking Kant that one should not only account for what is perceived, but also for what (or who) is perceiving.
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>>8335851

https://en.m.wikipedia.org/wiki/Antipositivism

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>>
The trick is to hide an engine in your bicycle.
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>>8335738
he's changing the direction of farting to gain speed
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>>8335738
I can't imagine what his penis is going through

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What should you do?
>>
>>8335675
You should leave the situation because you'd get charged with murder if you pulled the lever.
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>>8335735
Probably this, but perhaps this is the most complex one, because you have to wonder what is real.
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>>8335815
5 people get killed if you leave the lever, but there's a 2/3 chance that those people won't even be in our universe. So it's obviously for the best to not touch the lever. People in other universes don't affect us.

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>if you put something in a box, it will exist and not exist at the same time
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>>8335643
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>>8335643
that is why i can't take science seriously anymore.

fuck quantum mechanics.
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>>8335748
idiotic misunderstandings and wrong attempts by laymen at explaining things they don't understand is not science, and certainly not quantum mechanics

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Is it possible to recover from brain death? If yes, would the brain get "reseted"?
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>>8335541
No. Simply not possible.
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Poor Dick, years haven't been kind to him.
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>>8335544

not yet :^)

Tie a rope around the Earth's equator. Now untie it, and add one meter of rope. Tie again. How loose will it be? In other words: what will be the distance between the ground and this rope going around the Earth? Most people will either answer "close to 0" or (a few) "one meter". Do the math, and the answer may surprise you.

^mind was blown
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>>8335536
I think you stated the problem backwards, because the actual answer is 1/2pi meters which is pretty close to 0 compared to 1 meter. My mind was not blown.
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>>8335536
D=C/pi
D2-D1 = C2/pi - C1/pi = (C2-C1)/pi = (C1+1+C2)/pi) = 1/pi = ~0.24

Not sure what the point of this was, unless it's your homework.
>>
less than 1mm

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1234,56x10^7 or 1234.56x10^7 or 1234,56E7 or 1234.56E7?
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>>8335470
>starting an argument about notations and punctuations
>/sci/ - Science & Math
>>
>>8335470
$1234.56\cdot10^{7}$

back to plebbit my man
>>
>>8335470
the E stands for "Engineering is really all about sucking dicks"

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Hey fellas. I was walking home with some friends and we argued about probability.

If an attack has a 10% of landing, and you attack 5 times, what percent chance do you have of landing once?
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>>8335435
0.5%
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I don't understand. Why would it be 5 out of 10 chance if each attack is independent of each other?
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>>8335435
1-0,9^5=0,40951; -> ~41%

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Why are the insides of hands lighter than the upper sides?

And wtf is going on this this ad, I've never seen such hands.
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>>8335370
I have no idea, but it's really fucking creepy. Real hands aren't that black or shiny. Photoshop was almost certainly involved
>>
Sooooo how are the earbuds charged?
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>>8335370
>Why are the insides of hands lighter than the upper sides?
Because they're not exposed to the sun as much as the outside, so less melanin is needed to protect them from UV radiation

>And wtf is going on this this ad, I've never seen such hands.
This is probably shopped, for aesthetic reasons.

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This easily testable nonsense, the tongue map, long since debunked, is still being taught in academia as scientific fact, simply because the guy who wrote the book 60 years ago said it was true.

Why do you have so much faith in science?
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>>8335367
Because biology isn't a real science anyway.
>>
taste is truly the most patrician of the senses
pathetic AI senselets will never truly experience it
>>
>he typed into a machine that transmitted this information to screens 1000s of miles away

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Why do we get bored?
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>>8335255
we get bored so we start looking for things to do.

if we didn't get bored, we would never do anything.
>>
>>
>>8335255
Fuck you and fuck that fat cat

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Suppose a planet managed to develop an intelligent life form before sufficient coal or petroleum accumulated. What is the course of its technological progress?
>>
Biomass/water/wind/solar/nuclear for electricity.

Biomass for cars or electric cars or compressed air or syngas.
>>
Plant-based intelligences develop non-material, mental technologies and communicate using thought transfer.
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>>8335225
Most likely extensive use of hydroelectricity, no industrial revolution until they can make rudimentary electric motors.

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I demand scientific reasoning as to why leaning a chair back against a wall is more comfortable then sitting like a normal person
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>>8335213
>then
Then is temporal, than is comparative.

>>
cute snake
>>
>>8335215
It is, but he needs to understand it doesn't make up for the error in his post.

If you're in the mood for a laugh and you occasionally browse other boards such as /fit/, /r9k/ and /fa/ you will quite regularly see posts from men suffering from male pattern baldness either expressing their understandable displeasure at their situation or asking for treatment advice - but seldom is the question asked 'so, when is this going to be actually cured?' - it seems to be assumed that current options are all that will be available pretty much forever, which seems quite an odd thing to assume.

There seems to have been a decent amount of progress...
>>
In particular, there seems to be skepticism that this is even a solvable problem in principle. A number of people seem to think that this is something which literally cannot be done.

Their justification for this belief, when asked, is typically that 'it hasn't already been done' - which doesn't seem to be a strong argument.

Are there any good reasons to suspect that this is something which, in principle, is not amenable to medical intervention?

There is also a common belief that nobody 'wants' to cure it because then they wouldn't...
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>>8335036
It will be cured with genetic engineering, since its a pretty simple genetic trait
>>
>>8335048

Do you mean for future people (i.e. those not already born) or for everyone?

Obviously this is something we'll want to edit out of the genome in the future; and that should be reasonably easy. I suspect it will be routinely designed out of the equation in the mid to late 2020s; and be out of the germline almost entirely by mid-century.

But for those people already alive, are you proposing somatic cell gene therapy or what?

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Do you get headaches when you think too hard?
>>
No. Maybe you are dehydrated.
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>>8334984
Yes. You should take a break from that precalculus.
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>>8334992
I was playing the guitar.

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There are some people saying that wheat is bad for you. How right are they? Does it just apply to some people with an intolerance to wheat?
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>>8334969
It's bullshit. The problem is that people will eat 6000 Calories every day in cake and then blame it on the fact that it came from flour.

What you really have to worry about is how much sugar is in your diet.
>>
>>8334969
I haven't seen anything beyond the paleolithic diet argument, which isn't that compelling. From what I've seen it boils down to the same argument against corn syrup. It's so damn cheap that it's usage provides humans with more Calories than they know what to do with, but that's not a problem with the food. Just eat fewer Calories in general and there is no problem.
>>
>>8334979
Flour is mostly made up of sugars...

Wheat is not good for you, but not because of some weird gluten allergies...

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Let ${X_5}$ be the variety over ${\mathbb{F}_5}$ defined by taking the elliptic curve $X = V\left( {{y^2} - {x^3} + 1} \right)$ mod 5.

Show the number of ${\mathbb{F}_{{5^n}}}$ valued points of ${X_5}$ is $1 + {5^n}$/
>>
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>>8334947
do you know this is true? what's the context?
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>>8335051
>do you know this is true
yes

>what's the context?
just an example building towards some weil stuff
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>>8335060
it's not quite true, you might want to use a different textbook then whereever you're getting this info from. you can find it on page 7 here (https://eprint.iacr.org/2005/374.pdf) but basically you just:
1) write a=#E(F_5)-(5+1) and x^2-ax+5=(x-b)(x-c)
2) by theorem 4.12 in reference 15 in the above link we have #E(F_(5^n))=(5^n+1)-(b^n+c^n)
3) manually check that there's 6 points over F_5
4) so 6=#E(F_5)=5+1-a implies a=0
5) so x^2+5=(x-b)(x-c) implies b = -c = sqrt(-5)
6) so #E(F_5^n)=5^n+1...

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What is some good 3D planetarium software? Pls help, it seems like whenever I finally find what I'm looking for it's clunky as shit with a shitty GUI.
>>
>>
>>8334872
3D as in I can change my position and see the stars in their true positioning to each other.
>>
http://www.amnh.org/our-research/hayden-planetarium/digital-universe/

I keep trying to download it but I'm technologically inept and I can't figure it out

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So in recent News, apparently North Korea has set off a nuclear bomb underground.

No one ever explains this. In what kind of hole or chamber in the ground do you set off a nuclear bomb to test it, and how do you construct it? And what danger does it present as far as radioactivity?
>>
>>
>>8334858
Might be the wrong board for this but. If North Korea were to nuke the US would we really just nuke them back? Is that the only option? Seems kind of outdated with little respect for life
>>
>>8334881
it would probably open up the country for being taken over. I'm sure Russia would pounce at the idea of taking north korea for itself if its given a reason to.

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>tfw you figured out why P=NP in a dream but then the alarm clock went off and you can no longer remember it.
>>
>>8334580
You were wrong. Clearly, P = NP is not true for all N.

For example, consider N = 2. Then P = 2P, which implies 1 = 2, which is false. Therefore, P != NP.

Where is my million bucks?
>>
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>>8334596

>it's another "anon intentionally treats P=NP as an algebra equation to try to be funny" episode
>>
>>8334580
OK it seems like everyone is just making P=NP way more complicated than it needs to be. Like all it's saying is that any problem that can be verified quickly can also be solved quickly. But obviously that's true because how could you verify it if you hadn't already solved it? People just get too caught up in the obscure math hieroglyphics and lose sight of the bigger picture

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