Anonymous
Weird stuff calculators seem to do 2017-02-17 07:45:13 Post No.8681374
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Weird stuff calculators seem to do 2017-02-17 07:45:13 Post No.8681374
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Weird stuff calculators seem to do
Anonymous
2017-02-17 07:45:13
Post No. 8681374
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I found today that my calculator gives the wrong answer, and all of the calculators I can find give different answers, when given the following sum:
[math](10+4\sqrt{6})^2-20(10+4\sqrt{6})+4 [/math]
It should be zero, right, I'm not just retarded?Can anybody explain? Why does this happen? Pls no bully
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>>8681374
https://en.wikipedia.org/wiki/Floating_point
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>>8681374
>using a calculator
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>>8681384
youre using one right now
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how long until i can record movies with my brain?
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>>8681258
Recently, electrodes were developed that have been shown to not kill brain cells in mice models. For medical uses, this technology might be approved for human use within 10 years. For nonmedical use, it might get approved.
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http://www.opnwatr.io/
2018 perhaps?
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>>8681258
Never, stop making this thread
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what was there before the big bang?
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>>8680449
We don't know. We're not even sure the Big Bang happened.
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Can something befor t he big bang occur or exist under a causal independance?
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Tom Bombadil
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Re-post and highlight everything you're competent in.
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>tfw you made this meme four years ago and retarded undergrads are still posting it
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>>8679837
Did you really create this?
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>>8681118
just past the serious math gap i guess
not really interested going beyond that though
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Let's see how smart is /sci/.
Imagine that you and another guy are playing a game. The rules are very simple:
> you have to choose a number between 2 and 100
> if both of you choose the same number both of you will get the same amount of money (equal to the number you have chosen)
> if you choose different number the one who chosen the smaller number will get that amount (equal to the smaller number) of money plus 2 dollars, the one who chosen the bigger number will get the value of the smaller number minus 2 dollars. (Es: if the choice are 80 and 56 who has chosen 56 will get 58 $ the other one 54$)
What number would you choose?
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* obviously you cannot know what number the other guy will choose
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>>8683402
game is not zero sum. if my opponent isn't a microbrain we both get $100
even if he's a dick and chooses 99, I still get $97.
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Alcubierre warp drive is a space explorer's wet dream: faster-than-light travel, without experiencing relativistic time dialation, or even g-forces! But is it really possible? Please say yes.
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>>8682955
It is not impossible.
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>>8682968
Why not?
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>>8682974
It requires a type of energy that as far as we know doesn't exist, but theoretically could exist.
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3,000
If you think that number means three thousand instead of three with four significant digits, you are everything that is wrong with the world. Learn international standardized notation please. The only correct thousand separator is a space.
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3.000.000,00
three million
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>>8681641
I guess I'll just end me whole sentences with a comma too. retard,
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>>8681645
stop it
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>first semester compsci
>linear algebra
>professor laughs at all the brainlets
>first lecture covered matrix inversion, multiplication, determinants, other operations etc.
>second lecture fields, vector spaces, subspaces, quotient spaces
>progresses continually at a fast pace
>everybody crying its too hard
>end of semester
>1/4 of the class still attending lectures
>professor gets scolded for not covering basic shit,
>mfw 75% of the remaining 1/4 of the class is going to fail the final
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>>8679430
>first lecture covered matrix inversion, multiplication, determinants, other operations etc.
>second lecture fields, vector spaces, subspaces, quotient spaces
To be fair, that is incredibly fast. What did you talk about the rest of the semester?
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>>8679430
Linear algebra can be extremely daunting if explained incorrectly, but when explained correctly it's extremely easy.
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only 75%?
if quotient spaces were already introduced in the second lecture, how far did you get in one semester?
Anonymous
brainlet Spivak help lmoa! 2017-02-18 08:17:31 Post No.8683808
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brainlet Spivak help lmoa! 2017-02-18 08:17:31 Post No.8683808
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brainlet Spivak help lmoa!
Anonymous
2017-02-18 08:17:31
Post No. 8683808
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hi so im a brainlet and i started Spivak and I'm on like pg10 and what did he mean by this:
>"and also if a < 0, b < 0"
>"1 > 0 (since 1 = 1^2)"
i dont get the rationale here, just because 1^2 = 1 doesn't mean 1 > 0 since it also works if a < 0 for a^2 > 0
so why did he say this sci, i dont get how we proved that result from what he just said
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1 cannot be less than 0 since it is a square. Assume 1 is less than 0. Multiplying it by itself will yield a positive number as per the general rule, which is also 1. See the problem
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>>8683808
i swear to god im not memeing and im just retarded but
>1 cannot be less than 0 since it is a square.
can you elaborate? why can't we say the same thing about -1? im also confused why he's bringing it up at all
i thought the fact that it doesn't have a negative sign infront of it, and it's not 0, just implies it's positive off the bat
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If a tree falls in the forest and there's no one around to hear it, does it still make a sound?
Serious replies only.
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>>8683666
>if mirrors aren't real how can our eyes be real
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No.
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>>8683672
How do I know this post is real
Anonymous
Classic problems of open channel flow 2017-02-18 04:56:22 Post No.8683558
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Classic problems of open channel flow 2017-02-18 04:56:22 Post No.8683558
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Classic problems of open channel flow
Anonymous
2017-02-18 04:56:22
Post No. 8683558
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What the hell is this voodoo?
Please help
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is there an intuitive way to describe this?
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>>8683558
give me more info
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>>8683585
Look at the pictures, they are a side view of an open channel with water flowing left to right. When there is an obstruction in the water you intuitively think that the water elevation would rise over it, but instead it drops lower. Vice versa as well.
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does matter ever stop accelerating after crossing the event horizon? if a singularity has no surface, would it loop back and forth to each edge of the event horizon, stop at the center, or just never end acceleration?
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so this is the power of /sci/ not knowing anything.
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>>8681623
this is a product of popular science. it's not his fault.
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>>8681501
don't worry op neither of those guys knows the answer either
technically nobody knows the answer but the point is that everyone on sci only comes here to feel above everyone else
Will it fly?
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>>8683216
the conveyor belt is moving in the OPPOSITE direction as the wheels?!
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>>8683216
well, the 747 is powered using jet engine which blows compressed air in one direction to propel itself forward.
If there is not enough friction acting on the plane wheels by the conveyor, then 747 probably will be able to take off but if there's enough friction, then the plane will stay in the place
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>>8683216
https://blog.xkcd.com/2008/09/09/the-goddamn-airplane-on-the-goddamn-treadmill/
original troll plox
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Sup /sci, I saw this a while back on /b and never got the answer. Any theories?
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28
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>>8677847
But how
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>>8677841
32 because the answer has to square
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How does /sci/ get past HR and into a job?
I don't even think HR knows what they are looking for. One time I applied for a data analysis internship and a few days later they closed the opening and reposted the opening this time with a literal duplicate of my cover letter explaining all the shit I could do for them and would I would use. I got an interview, but the HR person was asking me irrelevant questions about how I would perform the job. She would ask me things like
"Why do you want to work here?"
"Why should we hire you?"
I'm not a communications expert.
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>>8677061
those are trick questions. it doesnt matter what you answer as long as you have that 'winning attitude' while answering. think of those subjects as small talk. also moar of here plox.
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>>8677061
They want to know what mindset you are in.
What I was told is that they basically want to make sure you'll fit into the work environment they provide. So the best bet is to be actually try to be sincere, because if you're not you might not integrate well in the position and team of the job.
But of course the main part is just a test to see how much you'll be willing to sacrifice in exchange for them providing you with a job.
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It's become a world of bullshit. They don't care what you know, how good of a worker you are, etc. They just want to know you can sell yourself. In most cases they want to see if you'd sell your own dignity or ethics in the interest of bettering the company. You just need to learn bullshitting skills.