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https://sites.google.com/site/scienceandmathguide/
>>
Reminder: /sci/ is for discussing topics pertaining to science and mathematics, not for helping you with your homework or helping you figure out your career path.

If you want advice regarding college/university or your career path, go to /adv/ - Advice.

If you want help with your homework, go to /wsr/ - Worksafe Requests.

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The 2017 "Great American" Solar Eclipse
The sticky

What is the solar eclipse? On August 21, in just a few days, the continental United States will experience its first total eclipse of the sun since 1979, and the first to cross from west to east coast since 1919. Please keep all discussion of this event to this thread, and share with us where you'll be viewing this amazing and rare spectacle of nature and what you'll be doing to commemorate this time. The next total eclipse to hit the U.S.A. will not be until 2024.

Totality: To view the full eclipse, you must be in the path of totality. This is the narrow, 70-mile wide path where the umbra (the darkest shadow of the moon) passes through. If you are not within the path of totality, you will miss the amazing spectacle that everyone the world over is coming to see. Do not be fooled by people who say 80% or 90% or even 99.99% partial eclipse is good enough. It's not. Even 99% obscuration is not enough to fully cover the sun in the same way that 100% can, and you will walk away feeling let down. See the resources below for maps of totality.

Traffic: Expect nightmare-ish traffic conditions as you get closer to and especially within the path of totality. Even in the middle of nowhere like Wyoming, traffic could be gridlocked for hours or even days on end. The state of Oregon is equating the situation to a natural disaster, with many rural as well as city roads at a total standstill. Gas stations may run out of fuel. If you are trying to get to the largest cities such as Salem, Nashville, or Columbia, you should depart wherever you're coming from by Sunday morning at the latest.

Lodging: Sold out everywhere. If you hadn't booked 6 months ago, you're out of luck.

Major cities within the path:

Salem, OR
Idaho Falls, ID
Jackson, WY
Lincoln, NE
Kansas City, KS
Columbia, MO
Carbondale, IL

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>>9115326
with give-away glasses, they seem more likely than others to be cheap fake pieces of crap.

Gasses with a strong enough filter effect will make it impossible to see almost anything other than the sun -- if you see room lights with a test-look through your glasses this evening they are unsafe fakes.

If you look at the sun with them, and it is brighter than a charcoal near the end od steak-grilling time, you have some fakes and they are not safe.

Decent glasses will show the sun as a easy-to]look-at orange (probably) object in a black sky.

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When someone is shot why is it not a death sentence? Like if they get shot in the gut why doesn't shit leak into their wounds and how do they live long enough for it to heal?

Why do bandages and the like not heal into wounds? Like the mending flesh doesn't slowly meld with the bandages? Or do they and that's one of the reasons you change bandages so often?

If veins are so important and carry so much blood what happens if they heal? Like if you cut your femoral or whatever and it heals but stays severed is your leg basically running on fumes from the other small veins?

t. brainlet wanting to learn
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thanks
>>
What exactly are you asking for the first one? Sometimes bodily damage isn't enough to kill you, what could be simpler than that? A gut shot can totally leak shit into you, but that doesn't necessarily mean it would always be severe enough to kill you.

And bandages don't "heal into you" because they're not in you, they're just on the outside, protecting the wounded, vulnerable area from getting shit in it. Things which are totally inside you, like a bullet, will absolutely get healed around and stay inside you (which will definitely cause problems later). You change bandages because over time they themselves get dirty and this makes them fall off, or cause the wound to get dirty, defeating their purpose.

And veins generally re-attach themselves when they heal.
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>>9115286
For the first one, I mean it seems very strange to me that people can heal from gunshot wounds

It goes through you all the way right so you've got a gaping hole in your muscles or liver or what have you, seems weird that people can survive that sort of thing long enough for it to close up
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>>9115463
That's why you're supposed to rest when healing and not exert the damaged tissue. If it's not a vital organ, your body will still function.

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Do you regret getting your Masters/Ph.d?
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>>9115282
What about a business studies undergrad?
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>>9115292
Studying business is a mistake in and of itself.
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>>9115347
I know but mistakes been made
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>>9114419
>is this a joke lmao? finishing my phd was easier for me than the prior 8 years of fucking retardation in HS and undergrad
you didn't say you were a social sciences phd
pls go and stay go
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>>9115282
Econ. undergrad here

Why do i have to commit to a PhD?

Because undergrad is overesaturated and Econ. is only useful at PhD level?

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Latest issue of nature has a great article on China's explosive growth in the eugenics field.
http://www.nature.com/news/china-s-embrace-of-embryo-selection-raises-thorny-questions-1.22468

The country’s central government and its current 5-year plan has made reproductive medicine, including PGD, a priority

estimates from leading PGD providers show that China’s use of the technique already outpaces that in the United States, and it is growing up to five times faster. Qiao’s clinic alone now performs more procedures with PGD each year than all of the United Kingdom. The ever-present spectre of eugenics lurks in the shadows. But in China, although these concerns are considered, most thoughts are focused on the benefits of the procedures.

And China’s uptake is growing fast. At CITIC-Xiangya, the number of preimplantation testing procedures rose by 277% over just 2 years,

In the West, PGD still raises fears about the creation of an elite genetic class, and critics talk of a slippery slope towards eugenics, a word that elicits thoughts of Nazi Germany and racial cleansing. In China, however, PGD lacks such baggage. The Chinese word for eugenics, yousheng, is used explicitly as a positive in almost all conversations about PGD.
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>>9113390
The Odin. Look her up.
>>
Basically you were born right on time to die in the Eugenics Wars at the hands of a genetically enhanced central Asian warlord overman who will eventually lose and then be put on a space shift to drift in space for two centuries that eventually a star ship captain will discover who will then...
>>
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>>9113235
Make Animes Real!
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>>9114717
I aree wholeheartedly. But please notice that your argument also apply to stop supporting niglets.
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>>9114622
Not him but tribalism is something that will take a long ass time to be bred out of us by natural means.
Tribalism will still be important situationally, but what we don't need is the frothing at the mouth tribalism that we fall victim to today

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Would you rather your son be a tranny physicists or an engineer?
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>>9115424
A tranny, definitely.

That way he fucking kills himself.
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>>9115428
Only 48% of the time.
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An engineer. That way, he eats at McDonald's instead of working for it.

https://www.123test.com/iq-test/#classical-intelligence-test

What u get on the test only 10 questions.
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>>9115173
I'd like to hold out on saying how the sequence is generated until later in the thread, but it will demonstrate why these "complete the sequence" puzzles are completely meaningless.

>>9115341
I'm not questioning whether the explanation is "right" or not. It's a valid way to generate that sequence, yes, but you can find a reasonable explanation for any of those values if you really want to.

>>9115155
I really am, I got it wrong because I miscalculated 114 - 108 as 7.
>>
>>9115373
>time
your a fuckin idiot kek
*you're
>>
10/10 easy as fuck, golf club question was dumb though.
>>
>>9115391
kek im kidding your not dumb, your smarter than me bud
>>
Got 10/10 while drunk
The stamp collector question took a while to wrap my head around, though.

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NASA really expects me to believe this is a legitimate picture huh
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>>9113292
>no stars
fake af lmao
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>>9114450
Looks flat to me
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>>9115276
We've been over this. Try and keep up.

>>9113870
>>9113904
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>>9114028

you can but it's expensive as fuck and generally not worth it. it's called the dynamic range of the camera. if you take a picture of a room with a smartphone camera, you might notice that the darker parts are way to dark and the light parts are way too light. this is because cheap shitty cameras can only take a small "slice" of the total light enviornment AKA they can only really select one small range of brightness to view, and everything lighter or darker appears all fucked up.

the human eye has a very high dynamic range than most cameras, hence why with your eye you can see the detail on the moon and stars just fine at the same time, but with cameras they generally have to select either the stars or the moon because everything inbetween would look shitty.

pic related is an example of low dynamic ranger vs high dynamic range.
>>
>>9113833
>>9113661
You're a stupid nigger
The important thing is the relative size of north america you dumb fuck
its distance, not angles fuck sakes leave the board you're clearly too stupid

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Redpill me on the mathematician meme.
Is it real job someone can have?
How would you live off of it?
Is it the shortcut to commiting suicide due to self percieved inadequacy with dealing with the subject?

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Is he, dare I say it, /ourguy/?
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>>9115388
Dubs confirm, but an /ourguy/ has to be a person who isn't a fictional character.

>>9113871
>high-school student
I'm sure most of /sci/, or even most STEM majors, were able to understand the 4th dimension in middle school.
>>
>>9113871
He's probably a brainlet but he's super cute and I want to fuck his mouth.
>>
>>9113871
literally an idiot. Sounds like half my friends when they're stoned. bad post.
>>
>>9115406
Therefore /ourguy/
>or at least /ourboi/
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>>9115432
> /ourboipucci/

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Didn't use math other than simply addition and subtraction in 20 years. I honestly don't remember how. I probably could work it out somehow but I don't feel like it so I came here.

Problem:
Going /out/ in a few days and decided to take some milk powder with me. It needs to be mixed with hot water (50°C-60°C) but not boiling hot. Can't measure anything other than seeing the water actually boiling.

With how much cold water (10°C-18°C) and how much boiling water needs to be mixed to get the desired temperature for the milk powder?

How long does it take for a "steel cup" (500ml) of boiling water to cool down to milk powder mixing temperature if the ambience is 21°C?

How do the results of those question change when it's done 1000m above sea level?
>>
\u gotta include wind,time,ur stupidity and some other things too
>>
>>9115407
>...change when it's done 1000m above sea level

Thanks for the laugh.

I bet you finished high school as well. This is why we radically need to change the school system and cut off people like this.

What did they mean by this?
>>
X-Man?
>>
>>9115450
* men.

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>Calculus III this semester
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>>9114509
My uni still has those separate courses.

In Calc IV we just see an introduction to these topics I think.
>>
>>9114509
at my school all of his calc 4 is in calc 3.
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>>9113475
Calculus 3 is the best calculus.
>>
>Electricity and Magnetism
>Thermal Physics
I'm actually kind of excited
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>>9114520
>>9114613
at the university i attended, calc 3 was multivariable shit. partial derivatives, equations of planes, the shapes - hyperbolic paraboloid etc
calc 4 was greens theorem, stokes' theorem parametric equations, and i forget a bunch of the other topics

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I am due to sit for some really important exams about this time next year, and until then, I will have to study for extended periods of time, as well as attending 4 or 5 hour long classes, every fucking day.

Has anyone used pills like Adderall/Ritalin/Concerta for scenarios like these? How long till you are addicted to them?

If they are addicting/cause more harm than good, I am then only going to use them 1 or 2 months before, and of course, during these exams.

Where can I get them for a reasonable price without a prescription?

Post experiences, advice, whatever.
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>>9114689
Meth is methamphetamine, adderall is 3/4 dexamphetamine and 1/4 levoamphetamine.
>>
>>9114740

According to my calculations a very small dose of street meth is the same as a prescrived dose of adderall
>>
One time I had wasted an entire semester doing drugs and drinking and I needed write to this essay (phil major), so I mainlined a point of crystal meth and then stayed up for 6 days straight smoking and shooting over 1.5grams of meth jacking off, aimlessly driving (literally drove the entire length of my country and back, stealing petrol the whole way), by the end of it I was heavily hallucinating and almost becoming delusional, my teeth literally felt like brittle bones it felt like meth was literally sweating out of my pores, my dick was at the same time swollen and shrivelled, I had sex with 3 street hookers and I payed this one to slap her around and choke her, by the end of it my condition had become so bad I took like 5 levopromazine (heavy antipsychotic) just to sleep. Man at one point I had taken too much meth and I was literally shaking all over and unctrollably jerking I honestly felt like I was dying and was seriously debating going to the emergency room, i took like 10mg xanax and I was still shaking then I sank 1 liter of whiskey all the while contiung to smoke meth it was so crazy it was like the pipe would just appear in my hand and I'd be smoking it, I'd be like "NO MORE STOP STOP FLUSH IT FLUSH IT!" and then I'd be like time travelling exhaling it. Had the worst 'hangover' of my entire life from it I literally took around a week and a half to feel the same again I was like the walking dead, the first couple days after I had slept from the sleeping pills I was completely bedridden.

man that first iv shot though (it was my first and only time/binge doing meth) was icredible, I've literally never felt anything really close to how good it felt, it was almost like a heroin nod I like dozed out into this weird sleep state for 30 seconds and then 'came to' with this massive inhale it's like the world hit me at 1 million miles a second I was fucking flying it was unbelievable how good it felt there were these waves of orgasmic euphoria all over my body
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>>9115417
needless to say I failed the essay
>>
If you need stims to do fucking SCHOOL work, then you're a lazy bitch in need of whipping.

Seriously though, if you can't do your schoolwork like every other student, don't bother, academia obviously isn't for you.

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And if yes, how can something immaterial define everything about the material world?
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>>9115295

No, math exists as patterns in human brains. There are no "immaterial" things, the concept isn't even coherent.
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>>9115313
>>9115329
Listen. Math is a lot more than counting rocks and imaginary patterns humans see. The fact that we can accurately describe everything from the movement of stars to the probability of things so small they don't even take space being somewhere with this language that is Math tells a lot about the Universe. If Math is just a human observed pattern or just something that logically derives from counting rocks, then we should have already found out that this mechanism doesn't work to describe reality at a fundamental level. But as it turns out the same human observed pattern that can be used to count rocks can be used to describe both biggest and smallest, everything of all colors, shapes, sizes and origins. Math is everywhere. It's the digits I'm typing, the binary code of the software you're running, the quadrilateral shape of this reply's box. It's obviously something material. But at the same time, Math can be said to be immaterial. Numbers and Pure Math formulas don't need space-time and/or energy-matter to exist. Numbers and formulas, Math in general, is something immaterial. It's what gives material things its materiality in the first place. So I think Math is something completely immaterial but at the same time it defines this material reality (if it can be said to be material at all).
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>>9115367
>Math is a lot more than counting rocks
I already wrote "and its consequences."
>as it turns out the same human observed pattern that can be used to count rocks can be used to describe both biggest and smallest, everything of all colors, shapes, sizes and origins
How could it be any other way? If mathematics didn't apply in different situations it would mean we lived in a retarded inconsistent dream-like world where logic and causality don't apply.
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>>9115381
I think we're getting a little off topic here. Look, what I'm trying to say is that Math is immaterial. Here's an argument for that idea. Numbers don't exist. Try to think of a number. Any number. From 0 to 10. Got one? You're probably thinking of the numeral, for example, if you thought of three, you're thinking of that drawing of a horizontally inverted E. Numbers, formulas, they don't need on the existence of spacetime or energymatter to be real. So, Math is immaterial. But at the same time it has many material implications. Like every single thing about the Universe. How come? How can something immaterial give birth to something immaterial? Does that mean we're really just living a dream and none of this is real, at all? I think Math is the greatest mystery of mankind. I like to think of Math as god itself. Not a humanoid god, but certainly an omnipresent creator. I can understand how you might think I'm crazy, but it makes a lot of logical sense to me.
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>>9115404
Is anyone arguing numbers are material? Abstractions aren't material.
>So, Math is immaterial. But at the same time it has many material implications. Like every single thing about the Universe. How come? How can something immaterial give birth to something immaterial?
Because you have the cause and effect backwards. Abstractions are derived from specifics, specifics aren't created by abstractions. Because physical reality is consistent and quantities don't magically increase or decrease in the absence of a cause for increase or a cause for decrease, we can trace out the consequences of numbers abstracted away from the specific material details that play out in the real world.
Abstraction lets you focus on one aspect of real world things while intentionally ignoring everything else so you can work more intensely with that one aspect on its own.



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