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Archived threads in /sci/ - Science & Math - 954. page

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Do professors go easy on girls in STEM?
120 posts and 4 images submitted.
>>
ya
my gen bio prof promised to spare my gpa so that i can go to med school
>>
>>8607552
If STEM includes biology and chemistry then no because that would be half the class.
>>
Yes

Despite the memes girls in CS in particular take the babby road to graduation and onward

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I'm 22 and unemployed. I haven't studied Science or Maths for over five years. Is it too late for me to become a STEM lord? (pic unrelated)
43 posts and 2 images submitted.
>>
No, start from scratch using Khan Academy
>>
Okay, will do.
>>
>>8606945
Get a job.
Save money.
Learn German.
Enter ETH in your 30s. They accept everyone.
Get kicked out after a year.

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Can someone explain to me Euler's identity?
(besides the common taylor expansion proof)
7 posts and 1 images submitted.
>>
I won't tell you much but I did get the eulers identity as a tattoo on my wrist my senior year in high school. Most autistic move i ever made. You can imagine how it went for me at parties and hanging out
>>
>>8613250

has to do with a geometric interpretation of imaginary exponents

kinda like how multiplication of complex numbers adds there angles
>>
There's this one proof that I enjoy.

Let [math]f(x) = e^{-ix}(\cos x + i \sin x)[/math] for any [math]x \in \mathbb{R}[/math]
Then, [math]f^{\prime}(x) = e^{-i x}(i \cos x - \sin x) - i e^{-i x}(\cos x + i \sin x) [/math] which obviously equals 0, again, for all [math]x \in \mathbb{R}[/math].
Since the derivative is 0 everywhere, we can assume the function is constant everywhere. f(0) = 1, so f(x)=1. Therefore, [math]e^{ix} = \cos x + i \sin x[/math] for all [math]x \in \mathbb{R}[/math]

How come this can only go down a kilometer?!

It's a six inch thigh plexiglass sphere! That's thicker than the window on the bathyscaphe's that have been in the Challenger Deep!

What is this?

I need to know to my fantasies.

How thick does plexiglass have to be to go deep?
11 posts and 1 images submitted.
>>
>>8613221
You seem to have a handle on more information about this crafty than we do. Tell us more about it - what type of motors, how they're mounted, fuel or energy source....
>>
>>8613226

Quit thatthat.

I'm just asking about plexiglass strength.

If I recall the Trieste had 5 inch thick plexiglass windows. It went down seven miles.

Now here is a submersible with a 6.5 inch thick plexiglass sphere.... And it isn't even rated for a half mile.

This is a math board, right?

You see how it doesn't add up?
>>
>>8613234

common sense tells me that they use different types of glass

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What does /sci/ use to learn Organic Chemistry (High school and beyond)?
Is it Morrison and Boyd?
Can you recommend some good YouTube lectures on Organic Chemistry?
7 posts and 1 images submitted.
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>>8613102
script.
>>
>>8613102
OP here. Can you explain what >script.
is about?
>>
read the fucking textbook

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>a profession so expensive that people can only afford their services by pooling their money together into an insurance company

Is medicine a racket? People afforded doctor's services for hundreds of years, even the poor grandmaa could afford a house call(which they don't even do anymore).

And then suddenly in 1950 you need (((insurance))) to afford seeing them at all.

Is medicine a scam? Were the commies right?
7 posts and 2 images submitted.
>>
>a profession so expensive that people can only afford their services by pooling their money together into an insurance company
whats preventing someone from having that much money on their own?

oh wait, nothing
>>
>>8612990
I don't think there was ever a time when poor people could afford the doctor.

Middle class people, sure. The rich, obviously. But not the poor.

And it is still that way. It is just that now we have actual cures for big diseases instead of just giving you butt shock therapy but those cures happen to be really expensive. Therefore the middle class also need the insurance.
>>
>>8613006
Rich people don't pay out of pocket. Not sure I understand whatever dumb point you're making

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Physicsfags and fluid dynamics fags,

What's the most efficient and effective way to unclog a toilet using a plunger?

Pic related is the one I have.
6 posts and 2 images submitted.
>>
>>8612934
I CAN HELP
YOU PUT IT IN POILET AND PLUNGE

finally i can use my PhD for something else than particle acceleration, thanks.
>>
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>>8612934
It would take me a month to explain why that very sentence doesn't make sense.
>>
>>8612934

you take a bunch of metal bars

you hinge them together with some kind of joint so they snake down the pipe a little ways

then you hook up a very high pressure vacuum and suck all the shit out

this would probably work, actually.

if the cloggage is large ball bearings or something then you have to take out the pipe

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How can Neily boy even compete?
6 posts and 2 images submitted.
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affirmative action
>>
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>>8612892
No competition.
>>
>>8612924
fpbp

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What are some good introductory books on economics? I want to read something as unbiased as possible, presenting just the concepts, models and math behind those models. I know calculus(I-III) and linear algebra and some logic, so I wouldn't mind a slightly rigorous book.

I have some friends claiming that economic models are implicitly morally biased, and I don't know enough about economics to confirm or deny that. So I want to get up to speed.

This relates to modeling behavior with mathematics, so I believe /sci/ is the right board for this
6 posts and 1 images submitted.
>>
>>8612641

>I don't know enough about economics to confirm or deny that

Perhaps before trying to delve into the mathematical models involved in economics, you should at least try to understand the topic you wish to predict?

Thomas Sowell Basic Economics is pretty good at that.
>>
>>8612749

I assumed a good introductory text would include and explain the mathematical models, but I admit that I don't know how complex they really can be.

I'll look into that book, thanks
>>
>>8612641
http://4chan-science.wikia.com/wiki/Economics_Textbook_Recommendations

What areas would I need to study to get into theoretical plasma physics? Especially dealing with turbulence? Currently an undergrad physics major taking stat mech and a masters-level EM sequence which will cover some magnetohydrodynamics. I haven't had any fluid mechanics, I'm assuming I'll need that
9 posts and 1 images submitted.
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why dont you go to your local institute and ask someone ?
>>
>>8612412
Yeah, talking to your smartest and/or friendliest profs is the best bet, even if they are not in that field chances are they could point you in the right direction.

Also, just pirate some books off libgen and see what they recommend as prerequisites in the introduction.
>>
>>8612412
Personality problems. Plus didn't so great, kinda embarrassing to ask them.

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I'm curious to see how smart you retards think you are compared to other retards:

http://www.strawpoll.me/12141706
9 posts and 1 images submitted.
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>>8612336
>only person who voted less intelligent
Th-thanks
>>
The results are pretty much what I expected but I'm bumping because I want more of you retards to answer the poll.
>>
>>8612336
bump

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> Walk into Calc II
> Start doing some practice problems
> "Can anyone solve this?
[math]\int \frac{1}{x}\ dx[/math]
> Poo in the loo autist:
> "The line of x plus C"

> mfw forgot absolute value
> mfw filthy Indian thinks natural log is pronounced "line"
9 posts and 1 images submitted.
>>
>>8612236
>> mfw forgot absolute value

You don't need it. ln(-x)=ln(x)+ln(-1) so the ln(-1) ends up in C.
>>
>>8612236
daww you upset your professor thinks you're both a brainlet and autistic?
>>
>"why can't this Indian speak perfect English?"
also
for the practical man the abs value isn't important.

kys.

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Am I doing shit?

6Fe2O3 = 4Fe3O4 + O2

Q = fO2 (fugacity)

ΔrG = ΔrG° + RTlnfO2

ΔrG = 0

- ΔrG° = RTlnfO2
- ΔrG°/RT = lnfO2
exp(-ΔrG°/RT) = fO2

fO2 = exp(-391.6/8.31T)

Inducing this plot.
5 posts and 1 images submitted.
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>>8611713
Fuck off thermofag
>>
>>8611713
Your notation is messy as fuck but yeah it looks like you did everything right.

ΔG = ΔG° + RT ln(Q)
Assuming equilibrium I guess lol
0 = ΔG° + RT ln(Q)
ln(Q) = -ΔG°/RT
Q = fO2 = exp(-ΔG°/RT) = exp((-391.6) / [(8.314)(T)])
>>
>>8611713
I can't read this shit, is that equation even correct? It doesn't seem so although that may just be it being unreadable.

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How do you deal with the soul-crushing fact that a human brain is unable to comprehend and fully understand/apply knowledge on some subject? That a human PhD is just 0.0001% of what lies down the rabbit hole in that subject? That human value to reproduce even if you work at mcdonalds far outweights the value of pursuing a PhD in mathematics.
7 posts and 1 images submitted.
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>>8611662
It bugs me all the time. Even worse is realizing that at every moment, I am losing information. The only way to retain information is by constantly rehearsing it. Otherwise you just forget. If only I was one of those superautists who can remember every detail of their lives. I would never have to read the same thing twice. I could learn subjects at lightning speed and become a master of everything. But no, it's more important for my brain to remember stupid everyday shit.

Then there's the fact that we're all going to die and all of our accomplishments will be for nothing.
>>
It makes you wonder if there is a limit to how far we can go. The more we learn about the universe, more is added to the knowledge pool, and the longer it will take for a student to reach that level. I really don't think anyone can understand cutting edge physics/maths until they're like 30, with constant study in the subject. It's just becoming so abstract and complicated. The human brain is designed to be curious, but it's also designed to not give a fuck.
>>
I would rather know some and have hunger for more than know none.

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Anon, thank you for coming. We want you to build a weapon capable of destroying a continent. You'll have access to as much funds you need.

Tell us, how would this super weapon work?
49 posts and 6 images submitted.
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Simple. Detonate a subterranean nuke at Yellowstone.

Funds plz.
>>
>>8611164
huh, I never knew china had its own Yellowstone volcano
>>
get the EU to initiate open border policies and accept millions of refugees

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