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Archived threads in /sci/ - Science & Math - 81. page
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So i was reading the wiki and saw a recommendation of Guyton and Halls Physiology and Robbins Pathology and lots of other books studied at medical schools. Do people really read those huge af books just for the sake of learning a new thing here?
>>
>>8463003
So you're asking if people really do read/have to read fuckhuge bricks for university? YES WE FUCKING DO.

What the fuck did you think? Jesus christ...

t. medfag
>>
most of it is bulk of the writer reflecting his ego, to project his person personality, and be friends with the reader

if you don't care about him / her and just read the book it only takes a day or two and you get all the necessary info
>>
>>8463007
No. When recommending Guyton, wiki said after reading this you will know more physiology than a med student cause medstudents go for important things only.

So i was asking if there really are non-med autists who read these books for fun..

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Why do they call it "real analysis"?

Is there a "fake analysis"?
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Why is a $\mathbb{R}P^2$ a real projective space if we can't embed it in $R^3$? I'd call it fake instead.

Ps. nice duck.
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>>8462532

It's analysis of the real numbers. Yes, there is also an "imaginary analysis". No fake one afaik, tho.
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>>8462544
>fake
that's nonstandard

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Not sure if this is the appropriate board to ask this, but I'll give it a shot. Has anybody here had negative effects from long term use of legal, prescribed stims, specifically Vyvanse?
>>
lisdexamfetamine fucks your shit up and i feel bad for anyone who's parents have had them on it since they were kids or teens

people have given up on solving problems
>>
>>8462242

id say stims are pretty safe. i dont think the side effects are good in short term and can be bad (depending who you are). but yeah long term not much probably unless you get addicted and maybe bad teeth/breath. feel like if u take enough for a long time it can increase your risk of anxiety/panic. maybe it will increase your blood pressure too? i dont know.
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>>8462242
I love it. I'm writing my doctorate thesis on vyvanse. wouldn't take it if I didn't have to do intensive work though. I value my sleep. Otherwise great for doing mass reading and writing

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We invented bread millenia ago... but we only invented something to toast it in 1893
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Really gets those axons electrified
>>
Really causes those synaptic vesicles to bind to their receptor sites.
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>>8460985

sure triggered a statistically significant increase in action potentials

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How did we have the technology to send people to the moon in 1969? How did 47 year old computers control the launch and maneuvers that were necessary? We sent people to the moon 47 years ago, and 47 years before that people were driving Model T's. It's just crazy
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>>8460080
Shitton of manual computation.
>>
see that flag moving in the wind?
that vacuum moon wind?

well guess what
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>>8460138
Are you talking about how the flag is upright instead of just fallen over? Well that's because there was a horizontal pole going through the top of the flag to make it stay like that

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How do I show that the vector equation of a line

[eqn] r = (6, -5, 1) + λ(-1, 2, -3) [/eqn]

is perpendicular to the plane

[eqn] x - 2y + 3z = -9 [/eqn]
>>
take a picture and give it to whoever asked u
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>>8454762
A book doesn't really help.
>>
Set up the equation of an arbitrary line which belongs to the plane, take the dot product with the original line, show it equals zero.

Alternatively, find the equations of 2 perpendicular lines which belong to the plane, take their cross product, show it is co-linear to your original line

Today I was sitting in my quantum field theory lecture, and the lecturer was female. We were going over the canonical quantization formalism and writing fields $\phi(x) [\math] as integrals over momentum space and creation/annihilation operators. Every time there was some technical derivation, she said: There is a technical derivation here, and I'm SO lazy today, so I'm not going to do it on the board, it can be found in my lecture notes though, with a smug smile. WHY couldn't she just say: I'm not going to do it because it doesn't provide... Comment too long. Click here to view the full text. 11 replies and 1 images submitted. Click here to view. >> She sounds like terrible lecturer. Not all women in physics are like that; don't mark us all like that because of one lazy lecturer. >> >>8464966 Can I give you the D? >> >>8464988 Fuck it, I just recently got dumped, might as well File: fun circuit.jpg (721 KB, 960x916) Image search: [iqdb] [SauceNao] [Google] 721 KB, Does anyone here work in the energy engineering field? What is your day like? Does it suck? Does the pay suck? 6 replies and 1 images submitted. Click here to view. >> >>8464140 Wew lad >> >>8464140 >Energy Engineering God damn, that name is almost as memey as "computer science". Seriously, Energy Engineering sounds like it comes from a bad sci-fi movie. God damn. The new meme degree is in town and I LOVE IT. But you know what sounds even memier? Energy Science. Now that's a meme! It sounds like someone really high came up with that name. Too bad is an unpopular major, I guess CS wins the meme game once again. >> >>8464197 I cant wait for the inevitable "Climate Engineering" to combat the climate change File: mww.jpg (4 KB, 250x150) Image search: [iqdb] [SauceNao] [Google] 4 KB, it's 7, i mean, come on, it's just expanding brackets and PIMBO 26 replies and 2 images submitted. Click here to view. >> >>8464087 >PIMBO Is this some sort of mathS-tier britbong meme? >> >>8464104 Do you seriously not know what PIMBO is? Where were you schooled? >> >>8464125 Its 9 File: image.jpg (122 KB, 706x1024) Image search: [iqdb] [SauceNao] [Google] 122 KB, Can you pass a basic voter literacy test? 34 replies and 4 images submitted. Click here to view. >> These were designed to have ambiguous, questionable answers you knob. >> >>8464020 The only one that isn't perfectly clear and logical is 6. >> File: fug.png (554 KB, 706x1024) Image search: [iqdb] [SauceNao] [Google] 554 KB, 706x1024 >>8463985 Did I pass? File: 1478163400105.jpg (61 KB, 398x600) Image search: [iqdb] [SauceNao] [Google] 61 KB, I am looking for the reaction equation of sunlight bleaching colours in textiles. Pic not related. 8 replies and 2 images submitted. Click here to view. >> [math]Coloured \; textile \begin{matrix} h \cdot \nu \\ \rightarrow \end{matrix} Bleached \; textile$
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>>8463517
how long does sunlight bleaching take?
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>>8463618
Depends on the amout of oxygen. It's faster when the textiles are wet.

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What's this board opinion on the darwin awards?
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>>8462668
Not /sci/
>>
Crass and inconsiderate.

People who shit on people for dying in an unlucky way are generally abhorrent.
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>>8462668

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>>8462082
the main "joke" of these cancer riddles is using undefined notation like two overlapping horseshoes in one place and a single horseshoe in another. This is perfectly doable with the four pictures interpreted as variables, so you failed miserably, OP.
>>
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>>8462082

Ridiculous

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So /sci/fags, imagine space within our Solar System. Immagine that suddenly a black hole appears just beyond the orbit of Neptune. Would we experience the effects of the black hole instaneously, or would there be a delay before before the gravitic pull from the black hole reaches us?
>>
Now this is a SQT thread.

What is the lifetime of a hypothetical wormhole?
Is short?
Long?
Do live long enough to drag too much matter into it?
>>
short delay because gravitational waves.
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>>8464542
There would be a delay of a few hours(?) since gravity moves at light speed

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Just started a new unit in physics. Might be a brainless pleb but I'm calling upon the hordes of anonymous to help me out.

A 2.00-kg mass hangs from a wire. Find the tension in the wire under an acceleration of _____

(A) 5.00 m/s^2 Up.
(B) 5.00 m/s^2 down.

>>
F=MA; Force is equal mass * accelation and so is Tension

So start by computing Acceleration and mulitply by mass
(A) a= 5-(g) because its up
(B) a= -(5+(g)) because its down
substitute g for local gravity, usually 9.82 but it can change depending how close you are to the Ecuator

So (A) 2[kg] * (5-9.82)m/s^2 = -9.64N
and(B) is -28.64[N]
>>
Haaaa... Glock-amole.
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>>8464460
(B)-29.64[N]* typo

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>Unable to tell if a paper is made up bullshit or not
Theoretical """"""""""""""""physics""""""""""""" everyone

https://en.wikipedia.org/wiki/Bogdanov_affair
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>>8463663
French fag here.
They're like your Neil deGrasse Tyson but double the trouble, ans often used as reference by our popsci normies.
>>
>>8463663
> actually have a theorem that tells you, you can't tell whether a statement is bullshit or not
lol pure math
>>
>>8463663
Wtf is wrong with their faces. I thought it was shop at first.

Describe your study routine /sci/? How many hours per week do you normally study? What techniques do you use if any?
>>
0 to 15. Depends on my brain if it starts wandering or not. Also it has to be start of an hour. For example if its 9:44 i'll waste time till its 10:00. If by mistake I am not vigilant about the time and waste it like its 10:08 or something, i'll have to shitpost till its 11.
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>>8463154
are you me
>>
Usually i study maybe 3 hours over the couple days before a test tops, then the day of a test I wake up at 3am, take stimulants, and study with no breaks until said exam. If there's no exam I don't study.well for the vast majority of classes I do this, I'm taking on that's split between undergrad and grad students that's finally hard enough I have to study normally.

Is it possible to take a continuous function and add an absolute value somewhere (e.g. $8x^2 + 7x$ to $8x^2 + 7|x|$) so that it ends up being discontinuous?
>>
Absolute values are still continuous, so it's the sum of two continuous functions.
>>
>>8462974
continuous: $\frac{d}{dx}(x)$
Not continues: $\frac{d}{dx}(|x|)$
>>
>>8462978
This.
In fact, the Weierstrass function is continuous everywhere but fails to be differentiable at every point where it is defined.

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why do non /sci/ people take /sci/s stuff and then take away the meaning
>>
>>8462172
because they're fucking normies appropriating our memes
simple as that
>>
4chan page's admin's really come a long way since I followed his page. Could someone with an account explain the joke to him?
>>
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>>8462172
crossposters/tourists that are okay with killing jokes as long as they get coolkid points from their peers

they're the absolute bottomfeeding scum of the internet

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>>
Oh god yes thanks for reminding me. This is gonna be so embarrassing, it'll be great.
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>>8462025
>This is gonna be so embarrassing, it'll be great.

Goldbach Conjecture

Pf:

- There does not exist any natural number > 10^200

- Thus problem is trivial computation.

QED
>>
H Y P E D
Y
P
E
D

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What could be outside the observable universe? More of the same or different physics like different particles types and forces?

Could spacetime itself fade into some other kind of medium? Maybe the GR equations are only valid in a patch of this medium we find ourselves in.

Maybe at the very highest levels it's all just randomness and what we think of as the fundamental laws of physics are really just some local regularities.
>>
>outside the universe

LOL wut?
>>
>>8460443

Spacedicks.
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>>8460461

Why did you leave out the word that explains why the question makes sense and then act like it doesn't make sense?

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WILDBERGER LITERALLY RECONSTRUCTING THE FOUNDATIONS OF MATH

HOW CAN YOU STAY SILENT ON THIS? ENJOYING YOUR IGNORANCE?

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>>8459461
Too lazy to watch it and give it a view, pls infodump it on us.
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>>8459461
don't know what the fuck he's doing, but it reminds me of hash tables
>>
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>>8459461
>vexels
>maxels
Oh boy he's feeling real creative again

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anyone wanna type a psych paper for me in the next few hrs? $50 to whoever does it 8 replies and 2 images submitted. Click here to view. >> File: Screenshot (4).png (161 KB, 1920x1080) Image search: [iqdb] [SauceNao] [Google] 161 KB, 1920x1080 already toook the two tests will send results to whoever needs them >> 500$ and I'll do it, when is it due?
>>
in 5 hrs can i make payments? lol

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What systematic sampling errors could possibly produce results that end up being this wrong, /sci/?
>>
>>8464445
Liberal bias
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>>8464445
>systematic sampling errors
More like outright propaganda. Dems and women oversampled.
>>
>>8464445
You can't get accurate results when you constantly attack one candidate and his supporters as being monsters.

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Pic unrelated.

If probability exists, then doesn't 'luck' exist? A property one can't control, like how it's said fate cannot be controlled. There's probability of something happening--like drawing a certain colored marble from a bag of marbles, at random. But 'luck' is what drives what marble you get.

What matters is the 'universal intellect' and 'context' that factors into fate's path. If it is specifically a wager, fate will side with 'a single thing'. If something is 'up to luck',...
>>
>>8464345
>If probability exists, then doesn't 'luck' exist?
No.

>But 'luck' is what drives what marble you get.
If it's truly random, then nothing drives what you get. You're just naming nothing "luck".
>>
>>8464356
'Luck' is what chose what marble you'd pick.
Luck pushed you to not 'make the choice', but that the marble would end up with you.
>>
>>8464366
>'Luck' is what chose what marble you'd pick.
Nothing chose what marble you'd pick, in the hypothetical situation in which marbles are chosen randomly. In real life there is a physical process which leads to a marble being chosen which appears random because of unknowns and chaotic processes. Again, you are just calling nothing "luck". You're saying anything meaningful.

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What is the best way to tackle any vector calculus question?

With the extensive list of theorems (Green's, Stokes', etc.), and "shortcuts" (conservative ⟹ path independence, etc.), there must be a type of flow chart for tackling vector calculus problems.

Are there any general rules of thumb that I should be aware of throughout my semester? My lecturer has provided us with all the theorems and how to apply them, but they just seem so disconnected. With the final exam approaching, what should my thought process be during the exam?
>>
Dude that notation sucks and green's is just stokes
>>
>>8464200
Which notation?
I know Green's is just the 2D version of Stokes'.
But what I'm asking is if there's some sort of flowchart of list of steps to check when I see any VC problem.
>>
>>8464199
pls halp I be retard.

I only know the normal integral. When will I see those crazy integrals my man?

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You wake up on Venus.

How do you react?
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>>8463896
Attempt to scream in pain, be unable to, die
>>
Get cooked to death in more ways than one.
>>
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>>8463896
You can't wake up on venus. The CO2 atmosphere would asphyxiate you

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http://www.ibtimes.co.uk/space-race-revealed-us-china-test-futuristic-emdrive-tiangong-2-mysterious-x-37b-plane-1590289

>Space race revealed: US and China test futuristic EmDrive on Tiangong-2 and mysterious X-37B plane
US and Chinese governments are already testing out their own EmDrive devices on spacecraft, sources say.

>Leaked NASA paper shows the 'impossible' EM Drive really does work

WHERE...
>>
we will travel to the stars on memes
>>
>>8463433
Finally we can travel outside of out galaxy and back in time.
What a ride,I am getting high on life.
>>
Newton on suicide watch

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Given enough free time, can someone with a degree in math/who studies Math teach themself other quantitative fields, such as physics or engineering?

Would you actually be able to get to grad level of that subject?

What would be the proper literature to do so?
>>
>>8463342
Bump
>>
>>8463342
Many mathematicians just casually get into other fields, start solving problems that have been avoiding solution for centuries like it was nothing, collect easy fields medals/honorary degrees and then go back to math.

Just look at Djikstra or Knuth. PhDs in math who one day slipped and when falling their heads hit a CS book that someone had left there, saw the title and immediately learned everything, then published algorithms and became famous, got books and honorary degrees and Knuth even got a comfy position...
>>
>>8463373
>Or look at Cedric Villani. PhD in mathematics who one day was visiting a pre-school and saw a kid reading a book. He asked the kid 'Hey, what you reading boy?' and the 5 year old replied 'oh, just mechanics. Just some trivial stuff' and then Cedric immediately had dollar signs in his eyes

My sides are in orbit

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These are the Hartley Hooligans, 15 and 10 year old sisters with microcephaly, CP, dwarfism, epilepsy, and a billion more problems. Their mother, who chronicles the torture chamber that is their lives in minute detail, is famous for claiming that the girls fully comprhend nearly everything around them and are getting better by the day.

To those who actually know a thing or two about the human body: is this possible? Are they sentient at all or are they just pure vegetable?
>>
1st, I dont know shit.

Having cleared the air, their experience is subjective. Unless they experience physical pain life to them is the same (likely) for you and I. Able to have good days, bad days, be shit on and do the shitting. They have no other frame of reference to define their torture chamber except for the same "wow i wish I had that" that you experience when youre witnessing the grandiose outside world on tv/pc (fapping). So i think they are likely just fine, and wont get the hot guy on tv, like you only drill bree olsons asshole from your computer chair.
>>
The question is are the conscious of the world or not? Is it even possible for humans with the litany of issues they have?
>>
Consciense at what level? I dont think they understand enough to know how fucked they are (hopefylly)

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