Archived threads in /sci/ - Science & Math - 540. page
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Hello, /sci/.
Complete science neophyte here.
I was having a debate about the sun today with a coworker. He said he wished the sun would just disappear because it was blinding him at that moment. Anyway, our point of contention centered around what would happen to the Earth if the sun just instantaneously disappeared. If it just "flashed" or "zapped" or whatever out of existence.
My argument was this - that after the sun disappeared, the Earth would flash freeze immediately after the ~8 minutes it takes for solar radiation to reach us...
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He is.
That scene is bunk.
>>7730562
>> https://what-if.xkcd.com/49/
Everything relevant that you need.
>>7730565
I knew it was in the context of that shit-ass Hollywood garbage, but wouldn't an immediate temperature change to almost absolute zero cause the Earth to flash-freeze? If not, how long would it take?
I'm tripping on acid right now but I was watching this video
https://youtu.be/JrOG1tKAatg
and it made me wonder why you can do this for exponentiation if you can't do this for multiplication or addition.
You can't, and it doesn't. The argument in that video shows that IF there is an x such that x^x^x^... = 2, then x must be sqrt(2) (or -sqrt(2), which the video ignores). That does not mean that such an x actually exists. (Note that this is the same process going on in your picture.)
In fact, it's not even clear whether x^x^x^... even means anything, much less what it equals. Meaningful interpretations can be given, but it's not cut and dry.
>>7730189
i could tell you, but then i'd have to kill you
>>7730189
For addition:
Any constant, regardless of how small, will not converge to a constant when an infinite number of terms are added.
For multiplication:
The expression at the top can be simplified to
[math]
x= \limit_{k \to \infty} 2^{\frac{1}{k}}
[/math]
which is evidently 1, but only because any number greater than 1 will diverge when multiplied infinite times. The same could be said for any constant.
What do you think about the relationship between religion and science?
https://en.wikipedia.org/wiki/Relationship_between_religion_and_science
My feelings on the subject are better articulated by Heisenberg, who said:
“The first gulp from the glass of natural sciences will turn you into an atheist, but at the bottom of the glass God is waiting for you."
They're different things. That's it. There is no relationship. They're not on a level playing field.
Someone who in 2015 is religious clearly hasn't got a clue of what evidence is and what it's for. Consequently, they can't be a real scientist; at best they can be useful grunts that get by by aping the motions of their betters.
>thinks iq is scientific
>>7729799
>just scored 115 on iqtest.com
When will this butthurt /sjw/ raid is gonna end ? We get it you don't like IQs because white people are good at it. You don't need to make ironic shitposting threads and flood /sci/ with your butthurt all day long.
>>7729818
I'm a white racist from /pol/
/lit/ on science
>>>/lit/7477592
> implying consciousness isn't completely materialistic.
>>7729652
I don't debate people who are unwilling to ever consider the possibility of their own view being wrong. Philosotards are as dogmatic as they are delusional.
>>7729959
sounds like a pretty lame excuse for lack of counterarguments desu senpai
How did you find out what's the best possible way to learn? Like, at first you struggle and don't know how to approach a topic. But now you've gotten to this point where you just execute and learn this stuff and even remember it without problems.
It seems like most things I learn are pretty fast forgotten. Any ideas?
>>7729625
As corny as it may sound, practice makes perfect.
Take time out to do homework and study well before you have to. If you always do your homework at the last second you will be in a rush to complete not learn the material.
When you do your homework write it neatly and carefully so that you learn it well at first and can review it easily later on.
In Freshman year of college I just did homework and handed it in, never bothering to save or organize my notes. After my second semester sophomore year...
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>>7729625
I started smoking in exam weeks. It helps you concentrate.
>>7729625
Find out what type of memory you have.
Can science make extremely retarded people normal again?
No. Thats not what "science" does
That's the plot of Flowers for Algernon
>>7729599
Yes once we cure the world of religion
Is math a meme?
Meme: An element of a culture or system of behavior that may be considered to be passed from one individual to another by nongenetic means, especially imitation.
>>7729591
What isn't these days?
Do you talk like this in real life?
Every math course at uni should be proof based tbqh pham
>>7729527
what are they in your uni lol?
Even numerical methods have associated proofs of convergence.
>>7729527
I agree but I feel weird about it. I wish that everyone, not only math majors like myself, would approach mathematics through proof based problems instead of the usual 'solve it' approach. But then I think that no engineer, physicist, chemist, etc. will ever be even close to proving a new theorem by themselves so it is a bit pointless to teach them the logic of proofs.
What do you think about that?
>>Expects us to believe because he memorized a proof and it's consequences he understands the material.
ITT: Cool elementary paradoxes/unintuitive stuff
>>7729491
In general rings you can have much smaller examples. Zero char fields a shit
>>7729491
>>7729491
[math]\int_0^{\infty} \mathrm{sinc}\left(\frac x1\right) dx=\frac{\pi}2[/math]
[math]\int_0^{\infty} \mathrm{sinc}\left(\frac x1\right)\cdot \mathrm{sinc} \left(\frac x3\right)dx=\frac{\pi}2[/math]
[math]\int_0^{\infty} \mathrm{sinc}\left(\frac x1\right)\cdot \mathrm{sinc} \left(\frac x3\right)\cdot \mathrm{sinc}\left(\frac x5\right)dx=\frac{\pi}2[/math]
[math]\cdots[/math]
[math]\int_0^{\infty} \mathrm{sinc}\left(\frac x1\right)\cdot...
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>>7729535
You know what fucks me up? Infinity. Very idea of infinity is pretty crazy.
First up, real number infinity is pretty easy to grasp, because these numbers represent an definable countable object or what ever. Then you get the infinity of Pi and that shit. What ever, easy stuff.
What fucks me up is space, if you were to travel in one direction forever. You would ALWAYS find new "space". There is no edge, and if there was... would it make sense? But then how could it possibility exist infinity, and then how could just the idea of our universe exist without creation. I mean every particle, energy exists in a system, infinitely and always changing states or existing. But always existing. We exist because more matter exists than anti-matter. But what came first? The very fundamental particle we're all made up of, or the universe?
Doesn't even the idea of the string theory blow your mind? Because we can break up the quarks, then keep going, and going until we make up the fundamental particle. But what is that fundamental particle made up of? Just itself, but how does it exist just within itself that it made up everything but still it's here? Like how is this "string" particle able to make up fucking everything you see, but. It wasn't created by anything else?
It blows your mind because it's doesn't fucking exist outside of math mental wankery.
The "space" is infinite by definition. it means empty area, which is what you get by default. It's a pretty understandable concept. The matter that fills the space is finite and has a limit and ends somewhere.
It's not mindblowing at all.
>>7729388
Just because something is defined as infinite doesn't justify it to be understandable to finite minds, aka us (humans).
Schrödinger's cat is a meme-tier thought experiments that holds no real significance or scientific merit.
Its only purpose is for normies to say
> oh i am such le nerd ;) quantum physics amirite lol i love sheldon ZIMBABWE
fucking assholes pride themselves on their understanding of it, but it's so simple and dumbed down a 7 year old could understand it.
>>7729319
/sci/ is not your fucking eco chamber retard.
[spoiler]But yes.[/spoiler]
>>7729319
>normies
you do know that using terms such as the one above make you look like an über-cringe-inducing clot, don't you
>>7729324
> current year
> uses the word über
Not sure who the cringe is here
![498840535[1].jpg](https://i.imgur.com/LJGFsN7.jpg "498840535[1].jpg")
Does /sci/ recommend brainhacks that can make me study?
I can never study, and if I do I can't keep on studying for more than a moment, so I've been considering taking modafinil.
get off 4chan
>>7729038
Close your laptop, open a book, don't look away for 5 minutes
There, you've entered study mode
>>7729044
It literally doesn't work
I once smashed my router, phone and laptop and still couldn't study
It was possible to pass without studying all the way through highschool, but Uni is too big to bite, desu.
http://www.technologyreview.com/news/544421/googles-quantum-dream-machine/
What is /sci/ consensus? Breakthrough or impending failure?
>>7728944
>and cooled the apparatus to a hundredth of a degree Celsius above absolute zero.
facepalm.jpg
>>7729132
Are you sperging out over the unit? It's not wrong.
>>7728944
It's really pretty
What's wrong with this /sci/? Why I am getting the last result 'half' wrong?
>>7728812
well to begin with you're assuming that P = 2pir = one anus
it's actually two ani
insert that into ur equation f a m
>>7728818
>it's actually two ani
what? isn't the perimeter of a circle 2·pi·r ?
>>7728812
Think shells
V= ∫[0,R] 4πr^2 = 4/3πR^3
For disks
V=∫ π √[R^2-r^2]^2 dr = π ∫ R^2-r^2 dr = 2π[R^3-R^3/3]=4/3πR^3
