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Archived threads in /sci/ - Science & Math - 1258. page

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So, I was wondering how can I calculate the total volume percentage on three liquids?
Assignment is as follows:
I need to add any amount of liquid A (Methanol 53 vol%) and liquid B (Methanol 57 vol%) to create a liquid C, which has a volume percentage of 86 and volume is 30 liters.
I hope my english is understandable enough that you understand what I'm trying to ask.
Pic related, it's the formula that you're supposed to use.
8 posts and 1 images submitted.
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Anyone?
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I'm not sure I follow, but you are mixing 53 vol% and 57 vol% methanol to create 30 liters of 86 vol% methanol? This is impossible IMO, you could only get a solution in the interval (53 vol%,57 vol%). Never less never more.
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>>8456848
agreed

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If I have a way to make a human level artificial intelligence, should I do it?
16 posts and 1 images submitted.
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Absolutely
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>>8456235
this desu senpai
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>>8456234
Just don't let it get on the webbernets if you can avoid it. May I ask what's the big idea...?

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Is there an evolutionary reason?
92 posts and 12 images submitted.
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>>8456181
>white
>race

>black
>race

>race

there's your answer
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>>8456181
probably the same reason aluminum is so diverse....quantum mechanics
>>
Phenotype and genotype. Why are feline so diverse?

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So... How do you plot this?
Is it like a function that you can type down in a plotting program?
6 posts and 2 images submitted.
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lorenz attractor. See http://mathworld.wolfram.com/LorenzAttractor.html and https://en.wikipedia.org/wiki/Lorenz_system
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I guess you just put the differnetial equation in, and some initial parameters and das it mane
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>>8456096
https://en.wikipedia.org/wiki/Lorenz_system

Why are science puns the worst puns?
19 posts and 3 images submitted.
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>>8455852
>tfw i'm tripping on acid
I swear 4chan turns into one huge solipsist box every time I do so.
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>>8455852
put your shoes on, omg
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>>8455867

Don't judge the man's corroding feet fetish, Anon. It's $currentyear

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Why is this still taught as fact? Is it because scientists fear/hate the idea of a higher power?
43 posts and 13 images submitted.
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>Creationism

Why is this still taught as fact? Is it because Christians fear/hate the idea of being a tiny, minuscule, unimportant speck in the grand scheme of things?
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>>8455844
>dodging the question by using a "no u" argument
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>>8455858
Only one of the two ideas proposed is plausible

Figuring out which one left as an exercise to the reader

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Went to visit a uni, they told me double majoring in compsci and mathematics is a great idea. Is it bait or should I go for it /sci/?
7 posts and 2 images submitted.
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>>8455790
If you do you'll probably grow to hate one or the other
The way that math takes so long to do anything practical with
The way comp sci uses retard level math and hardly ever uses it properly
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>>8455790
minors and double majors are only required if your actual major is not good enough. if you are doing math or CS you don't need a 2nd degree. its a waste of time.
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>>8455790
>majoring in compsci

A complete waste of time. Double major in math and CpE/EE.

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>Theories of how galaxies should move is contradicted by empirical reality
>HURP DURP LETS JUST ADD DAAAAAAAAAARK MAAAATTTTTEEEEER
>Universe is expanding at an accelerating rate
>DURRRRRRR DARK ENERGYYYYYYYY
Can someone please explain to me how physics is a hard science?
7 posts and 3 images submitted.
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We are certain now that there's energy in the vacuum of space. So as the universe expands, according to the square cube law, the amount of energy increases far above the rate of expansion. This is why in the early universe the force of gravity dominated but as we expanded the force of dark energy now dominates.

What we don't know yet is the amount of that energy per unit of vacuum, we're still trying to work that out.
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>>8455784
retard
>>
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>>8455784

There's a bit of truth in every bait, so I'll explain it to you like you're being genuine.

It's a hard science physicists don't claim to know what "dark matter" or "dark energy" is.

Some people have come up with some hypotheses that can be tested. Some of them have been shown to be false. Others remain undetermined from current observations.

Some people have come up with hypotheses that we're unable to test now, but may be able to be tested in the future. These hypotheses are naturally greeted by more skepticism from others in the field.

These are great intros to the topics:

Dark Matter: https://youtu.be/IhG1kHbRppY

Dark Energy: https://youtu.be/7w1t5ipDkjE

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Is water retention a real thing or is it a fad to make fat people feel better?

>INB4 "Go to /fit"
10 posts and 1 images submitted.
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>>8455711
Search "edema"
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>>8455711
of all things available, why such a disgusting picture
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>>8455716
/tv/ is a minority on this site

They used to be fairly dense with information, well explained, and coherent. Now they seem to be filled with irrealavant and distracting fluff that isn't of no use to the student.

I had my cousin over for a visit today, and he had me help him with some of his trig homework. The textbook they were having him read was complete and utter garbage compared to the textbook I had that was published in 84.

Why do they give students today's such shitty textbooks? Why the hell are they still even publishing new editions of books covering basic concepts like trigonometry and calculus? it not like anything has changed between a hundred years ago and now regarding the fundamentals calc, trig, and many other areas of study.

ITT: we shit on the textbook industry
38 posts and 4 images submitted.
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>>8455707
HEY GUYS, LET'S BUILD A CAPITALIST ECONOMIC SYSTEM IN WHICH THE MEANS OF PRODUCTION OF TEXTBOOKS ARE IN THE HANDS OF LARGE COMPANIES AND MILLIONS UPON MILLIONS OF STUDENTS ARE IN NEED OF TEXTBOOKS EACH YEAR!

GEE, I WONDER WHAT COULD POSSIBLY GO WRONG!
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>>8455717
The issue isn't capitalism. The issue is the fact school is publicly funded and the free market has zero say in determining matters( such as what textbook to use) as there are no penalties in getting it wrong.
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>>8455747
BINGO!

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>The Sun has fallen out of orbit and is going to crash into the Earth. Humanity has randomly chosen people to enter an underground nuclear shelter with enough food and provisions for the next 50 years until the Earth is habitable again, luckily you were picked.
>You are allowed to bring one scientific instrument with you.

Choose wisely /sci/...
12 posts and 2 images submitted.
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>the sun has fallen out of orbit

A fucking dildo
I want to ram something up my ass one last time before the solar system fucking collapses in the next few minutes
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>>8455619
>The Sun has fallen out of orbit and is going to crash into the Earth

I wonder how big the crater in the earth would be if that happened. :^)
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>>8455619
What if the sun gets deflected by the moon?

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Guys im going to be the next alber einstein ask me anything
>>inb4 you are not smart and i am the real smart guy here
13 posts and 1 images submitted.
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>>8455618
How can we formulate QM without reference to imaginary numbers?
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so OP how do you wanna become the next einstein if you cant even spell his name correctly
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>>8455631
Ok, good question!
Say we have 1 thousand dogs, if W=Fdx and I = Fdt then W/I = |v|

Can someone please help me with this problem? I don't see a way to do it.

Also /SSG/-Sequences and Series General
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integral diverges, series diverges
it doesn't even tend to zero baka
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>>8455612
The argument is not monotonicly decreasing you mong.

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You folks hyped for ITER or what? This will blow every single solar or other "clean" energy arguments completely out. Hell, you could probably find enough deuterium on Mars to run this thing.
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It's still like 15 years away from full operation. And that's assuming no more setbacks. It has already been pushed back a lot from original estimates.

Assuming it works, it's still only a proof of concept--- that concept being a fusion reactor that puts out more energy than is put in. It would be up to its successors to "blow every other clean energy argument out". It would still be awesome.
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>>8455560
this

ITER's goal is to be a test bed for Fusion and "energy out" Fusion. Not as an actual proto-type for a producible fusion reactor.
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>>8455519
Fusion research is great, but I can't see this (or anything similar) as ever being viable as a practical energy source.

Fast neutrons make it much harder to get useful energy out, as well as making radiation shielding a nightmare. Capital cost will be astronomical (capital servicing is the primary operating cost for fission).

What problem does this solve that fission isn't a better solution for?

IMO, fusion power is only going to be viable if we can get aneutronic fusion working, and tokamaks aren't going to do that (1H+11B fusion has 1/2500 the power density of D-T, so we'd need something 2500 times larger for the same power).

Can someone explain (or prove, though not required) why two intersecting perpendicular lines diagonally across a plane with an infinitely small circle of radius r in the center does not disprove the Four Color Theorem? In the middle do they all not touch and either two sections of the four quadrants would be forced to touch along the sides, or through the center, or standing as it is in pic related where the four quadrants support the Four color theorem, the circle that is colored any color would touch one of the four quadrants?
13 posts and 2 images submitted.
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Can you articulate in a little shorter sentences?

Also, state what you think the theorem is about.

Also
>infinitely small circle of radius r
while you shouldn't even fall for the Descartes meme of thinking it needs points to make up for lines and planes, please don't reason with infinitesimals like properties for finite things apply to them
>>
In mathematics, the four color theorem, or the four color map theorem, states that, given any separation of a plane into contiguous regions, producing a figure called a map, no more than four colors are required to color the regions of the map so that no two adjacent regions have the same color. Two regions are called adjacent if they share a common boundary that is not a corner, where corners are the points shared by three or more regions.[1]

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