Archived threads in /sci/ - Science & Math - 25. page
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How big is big enough? Shouldn't we built something like the "Overwhelmingly Large Telescope" in space?
Also, what is the max angular resolving power of interferometric telescopes? I mean how large can they be before they are hindered by their size?
Anyone here make their own Astronomical Interferometer?
>>8188154
>How big is big enough?
The size of your aperture largely dictates your maximum resolution. The larger the aperture, the better the resolving power. Thus, there is never "big enough", just "how big can we get away with?".
>Shouldn't we built something like the "Overwhelmingly Large Telescope" in space?
Yes, that would be nice. However Hubble pretty much pushed the envelope of what can be lifted into space. It...
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>>8188341
Put it together in space then?
Why was the overwhelmingly large telescope cancelled?
![latest[1].jpg](https://i.imgur.com/ytUxptz.jpg "latest[1].jpg")
What would an extraterrestrial vehicle look like ? And what propulsion technology would they be using ?
We build everything out of steel components for stability, heat resistence, endurance, etc. What would they be using for interstellar or simply aerial travel ? Also what would be their fuel ? Seems as if anti-gravity is physically impossible, would nuclear energy be their long lasting power source ?
>>8185144
Their spaceships wouldn't look to different from our own from the outside, unless they came from planets with very different gravity and atmospheres. Because the requirements for successfully launching spacecraft could differ.
Inside, I imagine most ships wouldn't be manned, at least not by biological intelligences. If manned, it would depend on what that specie is like. Maybe they'd rather swim around in an oxygenated, breathable liquid - this is a possibility for us humans too. See this:
https://www.youtube.com/watch?v=ACQr0IZIb5I
In...
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>>8185158
so like this
https://youtu.be/UEEES8BeNCg
You are a biologist traveling in the rainforest. You are bitten by a poisonous snake. Luckily, you know that the antidote for this poison is secreted by the female of a certain species of frog native to this rainforest. You remember that females and males of this species look exactly the same, and can only be distinguished by the distinctive croaking of the male. You also remember that the population is split evenly between females and males. Amazingly, you spot a frog of this species in front of you. At the same time you hear the distinctive croak of a male of the species behind...
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>>8186514
It's 50/50 either way.
>>8186528
So you're saying there is a 50% chance of licking a female if you lick the lone frog? And a 50% chance if you lick the two frogs?
>>8186528
Wrong. Try again.
Hint: That would imply that males are as likely to not croak as females, which can't be true.
>>8180674
Thanks, I'll keep in mind not to try.
>>8180674
Why [math] 10^{200} [/math]?
>>8180686
Number of atoms in the universe I suppose
>DUDE TELEPORTING / CLONING KILLS YOUR CONSCIOUSNESS AND REPLACES IT WITH SOMEBODY ELSE LMAO
Is this true?
If you actually understood the hypothetical mechanics of teleportation, you wouldn't ask this question.
To be able to say that it kills "you", one has to believe in an immaterial aspect of personhood that is somehow bound to a specific body, yet separate. Otherwise, a physical copy of a body is no different from living day to day. Personhood is the ultimate illusion.
>>8184574
Atoms of clone subject are scanned, logged as information, information is sent over a communication medium, information is received on the other end, clone subject is reconstructed using the received information that corresponds to the subject's atoms.
No?
>he emphasizes rigor over intuition in his proofs
>>8189417
so?
physicists and mathematicians are autistic
biology is best science
>>8189427
if u're a girl
Ask a pre-med who's just realising that he's not cut out for it, and is in fact, not as special as he'd like to think he was anything.
Keep going. It will be funny
>>8189275
Is your "special" defined as having enough patience and endurance to memorise whole books of raw data, as well as persevering even when you are toyed around during the merciless grind that is med school? If yes, kill self. If not, you might be redeemable after all, and study one of the natural sciences.
>>8189279
Interestingly enough, my pre-med curriculum involved a low amount of memorizing, and more physics/chemistry/non-anatomical biology(IE: the non-rote-memorizing kind)
My "special" is just realising that even though I may do quite well, there are still hundreds who do better.
Is it possible to make smaller versions of atoms? Like if you cut all the subatomic particles in half somehow could you make a smaller atom? I ask because I'm interested in producing a replica of a nuclear bomb explosion that can fit inside a glass jar, but I need the size of the atoms to be proportional
Sure you just need a really small knife and start cutting in fractions of like 0.1 pm or less.
>>8189188
And you need to start benching so that you can generate gigawatts of energy every cut
>>8189169
You just need a small enough knife.
The universe has infinite precision, so don't worry about getting the smallest pieces. Just need to make some better than the standard garden variety atom.
Hey /sci/,
I'm taking an ODE class in the fall, and it's been about 2 years since I finished vector calc. I can do most basic integrals/derivatives still, but the harder stuff isn't all that fresh in my head.
Will that be sufficient for the class? If not, what sort of stuff should I be reviewing?
Thanks.
>>8188533
>what sort of stuff should I be reviewing?
>vector calculus
Idk man, it almost seems like you should be reviewing vectors and calculus so that you're familiar with what you deal with in vector calculus...
>>8188533
Ordinary just means that they exist in ordinary n-complex-dimensional barnett integrable spaces.
Sure you'll be fine.
>>8188533
if its the generic ODE cookbook class you'll probably never need any linear algebra harder than taking determinants, finding (generalized) eigenvectors, computing jordan canonical form, and maybe matrix exponentials
What realm do numbers exist in?
>>8188365
The Meme Dream Realm
any realm with a concept of nothing and the concept of a container
>>8188365
Metaphysically.
hey, /sci/entists
Wanna watch the launch of the latest manned spacecraft to the ISS?
Streams:
http://www.roscosmos.ru/317/
https://www.youtube.com/watch?v=kdRlu-PYNJA
launch in about 2 and a half hours from now
Your friendly reminder.
>>8188214
Will NASA ever send/retrieve crews to/from the ISS again? Can Orion do this?
>>8188280
Dragon 2 next year
I have a sequence of numbers 0,1,2,3,...,2n
Can't figure out the sum formula for the values at the even places and the odd places.
Been stuck on this shit all day and no progress in this shittery I've got a test that decides if I go to collage or not on Monday and I've wasted all day on this shit cause I can't fucking let it go and move on for the love of fuck someone help me move on to other shit that I'm gonna get wrong and make me more miserable .
consider the modulus function
>>8188040
Man I learned how to add to fractions together a month ago ,all I know is the sum formula for the arithmetic and geometric sequences ,tried some logic and on the arithmetic sum formula and I've got n^2 for the even sum, where n is the number of values if I plug in 5 it will sum up 5 values from the series.
>>8188032
Is this how your sequence works?
n=0: {0}
n=1: {0,1,2}
n=2: {0,1,2,3,4}
n=3: {0,1,2,3,4,5,6}
n=4: {0,1,2,3,4,5,6,7,8}
...
If so then it took me like 5minutes to figure this out: the sum of the odd numbers is n^2 and the sum of the even numbers is n^2+n.
Just take the derivative of x^2 or play around with triangle numbers or look for patterns in a times table, you'll understand how I got those equations.
red pill me on things thatt are even more mindblowing than vsauce/numberphile
I mean give me some intense logic based mind fuckery...
i want full frontal cerebral bore..
what is the coolest thing you know, that pertains to mathematics/logic?
>>8188014
Have you read The Extended Phenotype?
It's easy to read, as it's biology, but also it's a big bundle of novel concepts and insights.
Plus, you probably won't fully understand evolution until you read it.
>>8188014
Holy fuck kill yourself you cancerous retard.
>>8188028
Mind blown.
so today i was making some HMTD ( quantities dont really matter here ) and everything was fine until after some hours i forgot to cool down the mixture back to ~0C i went up to 40C so took the mixture back to an ice bath.when i came back after a few minutes the whole room was filled with a digusting smell and the mixture in the beaker was dark orange-black.i know that the problem was that the temperature was too high but whats strange to me is the runaway product it looked realy familiar to phenol formaldehyde but it was
squishy like a play-doh
note that its my first...
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>>8187792
thats the only photo i took
anyone?
Hope you're hiding behind 7 layers of shitposts m8.
inb4v&
Is plasma donation worth it? What do they actually use blood plasma for? I've heard conflicting reports, some say that it's used to save lives, others say it all goes into cosmetic production. Any plasma donation stories anyone would like to share?
you usually get 20-40$ for it. America is worlds largest plasma producer because the poors donate as much as they can for the $$.
As for the plasma itself, its actually full of many useful things. Mostly various clotting factors and antibodies. Which companies purify out and turn around and sell to hospitals for a fuck load of money.
Ive never heard of it being used in cosmetics.
>>8187289
https://www.blood.co.uk/why-give-blood/how-blood-is-used/blood-components/plasma/
>>8187289
The CEO of rackspace highly recommended it. When he was starting his business, they needed extra cash so they donated blood.
But it turns out you could only donate blood once per week. This is not the case with plasma.
