Archived threads in /sci/ - Science & Math - 309. page
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Why do we round 5 up?
Magnets.
[0 1 2 3 4] [5 6 7 8 9]
because its in the second half of base 10 digits
>>7945640
/thread
ITT: Theories about aliens and the universe
>>7945585
https://www.biblegateway.com/passage/?search=Genesis+1
>>7945585
I theorize that OP is a tremendous faggot
>"""""""""Theories"""""""""
Hypotheses faggot
How do you think, /sci/?
This is something I think about a lot because I have ADD and seem to think differently from most people. When I try to describe how I think to someone I usually frame it in terms of making really rapid connections between ideas and jumping all over the place. If I'm working through a physics problem, instead of approaching it from a single angle and delving deeply into the problem from there, I tend to go more for a shotgun approach to problem solving and try a bunch of different things until my train of thought leads me somewhere useful....
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>>7945521
i'm so disinterested in everything in life please god help me
>>7945521
The sooner you realize you're just a garden variety human being, the better off you will be. Self indulgence is not a positive trait.
>>7945542
no im special
anyone else starting to feel a little uncomfortable with the direction technology is taking society?
https://www.youtube.com/watch?v=ohmajJTcpNk
this is old news
If you weren't already uncomfortable with technology in principle, consider reading a bit of Marx.
I'm okay with this. I don't really see an issue.
>it's only 1,400 light years away
>>7945477
let the normies do their thing. it doesn't affect you.
>>7945477
>tfw you will never walk on the soil that covers kepler 452-b
>tfw you will never be able to hike the mountains of kepler 452-b
>tfw you will never be able to swim in the great lakes of kepler-452b
>tfw you will never be forced to lose weight so your bone structure can support you in the higher gravity
feels bad man
>>7945503
The same thing could be said about Earth by a person on kepler-452b. Personally I'd rather be here than there.
why do we rate geniuses based on the potential practical applications of their research and not on how smart they are?
>>7945397
Nigga in 50 years IUT could be taught to postgrads, "everything is trivial" is the most insufferable meme on this board and the easiest way to spot a high school student.
>>7945397
Because geniuses are people who are extremely smart. That's why we rate them on how smart they are, dumb fuck.
>>7945406
Oh shit I am the dumb fuck.
I thought you were saying the opposite.
My b
I think most geniuses ARE judged based on their smarts.
[eqn]0 \in \mathbb{N}[/eqn]
>>7945161
One sided approximation in a given limit
>>7945161
but 0 is a natural number and [math]\mathbb{Z}^+[/math] is {1,2,3,...}
>>7945192
>but 0 is a natural number
0 is neither positive or negative mate, elaborate.
>mfw
>mathematicians spend time proving mathematics works on paper
>engineers spend time proving mathematics works by building the society and infrastructure, which consequently allows mathematicians to spend time proving mathematics on paper
> to an engineer, infinity equals 1
How fucking more off could you be?
>>7945084
Actually, you pleb, from a mathematical standpoint, that statement is almost correct.
infinity equals -infinity is not almost correct, but literally anything else is.
>>7945090
>it's ok to be almost right! you did your best!
are engineers really this cucktacular? you approximate everything and ignore the discrepancies that physicists and mathematicians have to fan out for you. case in point? look at ductility decrease in steel when temperature dropped in liberty boats. they couldn't figure out how to stop those fractures because their knowledge of materials and physics was so "hurr it's almost correct" tier that they fucking caused...
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Hello /sci/, first time poster here.
I have been wondering for a time what if every organic component is obsolete; im not native english so my english is not as good as I desire; I'll explain myself.
>Every organic being needs a source of food, for example, humans need to eat, breath and drink to survive, machines dont.
>Humans have chemical responses that a lot of times triggers some kind of behavior that dont allow us to make some things, for example, when we are sad are less productive that when we are...
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>Organic beings die, we cant reuse ourselves to create new life but just to give another person a bunch of extra years of empty existence just because the dead was a donor.
Everything dies. The Universe dies eventually. You're only looking at things with the perspective of trillions of years being long. It's not.
This whole premise is just silly. You're deluding yourself into creating a 'purpose' for the universe that's not objective.
>>7944945
You just made myself ask more questions.
It's gonna take a while before machines come even close to being as self-sustaining as organic lifeforms. Machines also have their own vulnerabilities, there is no 'perfect' being.
So Im in the 5th semester of CS and I can calculate all kinds of crazy shit but whenever Im using imaginary numbers and quaternions I dont know what the fuck im doing and why it works.
Why is sqrt(-1) = i ? Ive watched like 100 videos but no one explains how the fucking point with the coordinates (0,1) on the y Axis becomes i.
It becomes worse when they say "the real part is a and the imaginary part is b*i", why do I need b*i at all here, what happend to the fucking Y axis, y = b*i obv but why? Why isnt y = b + or - i or b^i?
Ive seen explanations...
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>>7944803
>So Im in the 5th semester of CS
Yeah
>Why is sqrt(-1) = i ?
There it is
Nothing to see here folks, just another retarded CS major flopping around in their own stupidity
>>7944811
Im so sorry for asking pleb questions...
SORRY I FAILED YOU MATH OVERLORD
To understand where the multiplication rules come from, you may think of the set of complex numbers as the set of polynomials in x, where each occurence of x^2 is set to -1.
[math]p(x) := 3-4x+2x^2+7x^3 = 3-4x+2(-1)+7x(-1) = 1-11x[/math]
[math]q(x) := 1-x-3x^2 = 1-x-3(-1)= 4-x[/math]
[math]p(x)·q(x) = (1-11x)·(4-x) = 4 - 45 x + 11 x^2 = 4 - 45 x + 11 (-1) = -7 - 45 x[/math]
And indeed
[math](1-11i)·(4-i)=4-11+(-1-44)i[/math]
The x with the x^2 -> (-1) property is a symbolic tool here.
You may also think of a complex number a+ib as a...
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Sup /sci/ who here is a teacher? Worth it or not? Tell us about it.
Professor of Biology here.
Worth it if you really love teaching and/or are reasonably young and decent looking.
Fortunately, I'm both.
I teach at a small college and we don't exactly get the brightest students, but I receive great satisfaction from exposing their minds to new concepts and ideas. I like to think I'm making the world a little less ignorant every semester.
On the other hand, if you're reasonably good looking and personable, you can score some primo tail. Current gf is a former student, and I have a very beautiful and very...
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>>7944535
Sounds good. Do you think teaching at a high school level would be much better/worse? In my country HS teachers get more than Professors in terms of wage.
>>7944570
Difficult to say; here in the US I wouldn't teach K-12 if they tripled my salary. High School kids are little shits, used to being spoon-fed the bare minimum to pass a standardized test. They get no respect from students or their parents.
>Names a rocket after a mythological character who cannibalized his own children
What did NASA mean by this?
we shoulda named it "moon penetrator"
>>7944246
Because it sounds cool and plebs don't know the full story.
>etymology
>a hard science
[math] \color{red}{\mathbf{(USER~WAS~ BANNED~FOR~THIS~POST)}} [/math]
I think I found a truly free clean renewable energy source to power our everyday lives.
What if there was a power plant were we hooked up a bunch of exercise bikes and treadmills then hire people to run or pedal on them which will generate electricity into batteries which is then sent across the power grids of the United States of America?
The question becomes how much should these employees get paid for such hard work? I suppose you could always use slaves, but where would you find slaves in today's world?
This could also resolve the obesity epidemic...
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>>7944122
Why not use teams of horses?
>>7944122
The best way is to make this easy for the users: let the houses hook up and produce current to sell it back to the power companies. Several countries already do this, letting people generate solar power and sell it back to them.
>>7944124
What happens if horses go extinct yet humans somehow miraculously survives?
Plus it's much more funner to watch humans work out and be enslaved.
What's something that's notoriously hard to understand in your given field of study?
Pic unrelated
>>7943992
What is the square root of negative four and can I divide it with a number closer to zero than itself and receive a dividend of positive four?
>>7944031
sqrt(-4) = 2i
okay
>can i divide it with a number closer to zero than itself and receive a dividend of positive four
...no...
the fact that the dividend be closer to zero than itself would not allow for the dividend to be four...
>2016
>being in college
>not dropping out
Get real
Why can't we turn heat into energy by layering hundreds of very thin photovoltaic cells so that all the photovoltaic cells absorb each other's black-body emissions?
It'd be amazingly useful deep underground or in refrigeration if it worked, and I can't think of why it doesn't work, but no one does it.
No amount of finnicking will break the law of conservation of energy. Assuming you have a perfect thermal to electricity converter, you will only be able harvest the total amount of thermal energy you have.
Second, black body radiation will always escape into space and cool down your object till it's in equilibrium with incoming rays. So if you aren't getting light, you quickly lose the ability to give off black body radiation.
Also, there's the photovoltaic effect limitations. It's impossible to produce a current with a stream of photons below...
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>>7943833
I wasn't thinking about this as a way of violating entropy, just as a way of making a somewhat passive cold region by liberating thermal energy.
Is that threshold energy the only limitation for actually getting a setup as described to operate?
>>7943833
im pretty sure he means he wants to throw a block into his campfire and make it create enough charge to power his house.
RIP OP, was prob assassinated by exxon
