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The new /sci/ wiki
https://4chan-science.fandom.com/wiki//sci/_Wiki

(More resources in replies)
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To use MathJaX, put your TeX code between [ math ] ... [ /math ] tags for inline equations or [ eqn ] ... [ /eqn ] tags for block equations.

[eqn]\zeta(s) = \sum_{n=1}^{\infty}\frac{1}{n^s} = \frac{1}{\Gamma(s)}\int_0^{\infty} \frac{x^{s - 1}}{e^x - 1} \mathrm dx[/eqn]

Note: You may preview the output by clicking the TeX button at the top left corner in the quick reply window.

Additional supported file type on /sci/ is PDF.


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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>passport found
>engine found
>Betty Ong's remains found
This is because when an explosion happens it blows shit in the opposite direction. If it just "vaporized everything" we wouldn't ne here (refer to the Big Bang).
>why did WTC7 collapse?
Because of fire
It heated up on 10 floors, with uncontrolled ones on 6 of thdm for hours which lead the girders to thermally expand, leading to the failure of a key support column, thus facilitating a fire collapse.
>fire doesn't collapse things!
Whaf the fuck is a flashover?
>how did it happen when other buildings withstood fires for much longer?
Because it was some experimental design from the 1960s.
>those terrorists didn't know how to fly!
You're right. Which is why NORAD couldn't detecf them soon enough because they kept going up and down.
>jet fuel can't melt steel beams
You're right, but it can weakene it to the point of structural failure. Which is why it collapsed, due to the trusses and floors sagging and the top of the building no longer being able to support the weight. So the top of the building tilted and crushed the rest of the floors underneath it at near freefall speed. But the difference is the collapse was more outwards rather than inwards, which is why the concrete inner cores were left intact 10-15 seconds after both collapses before they too crumbled and fell due to no longer having support.
>the black smoke meant the fires were oxygen starved
This is wrong on two counts: plastics were burning which is why the smoke was thick, oily and black, and the fireproofing was dislodged due to the impact. Also, is this why 200 people jumped to their deaths?
>but it was meant to withstand plane impacts
Not going at the speed of a .45 caliber bullet that's the size of a fucking Boeing commercial jet.
>aluminum is too weak to penetrate steel

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>>16743894 (OP)
Dancing israelis
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>>16743895
So FWIW I think OP got the explanation for 9/11 physics right, but there are many diverse kinds of thermates out there using common to very uncommon minerals and metals; I would not count on there being reliable forensics for detecting novel mixtures of it that used mostly ubiquitous elements.
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>>16743894 (OP)
Where are the engines in Pennsylvania?
>>
"9/11 Was an Inside Job"
by Brian Stuart Fox

https://youtu.be/oa0eEGsiNaI [Embed]

To see the lyrics,
click on "...more"
and then
click on "Show transcript".
>>
>>16743894 (OP)
>girders to thermally expand
JET FUEL CAN'T MELT STEEL BEAMS

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so what would first contact actually look like?
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>>16744623
>ayys would likely be hostile and after our resources
Why? Almost everything we have here is plentiful literally everywhere else. I don't think aliens would even notice or care about us, and if anything would avoid us just out of concern for our microorganisms infecting them and vice versa.
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That feel when you realize we probably should have included a message that said "STERILIZE EVERYTHING ON AND IN THIS!" with the rest of them when we sent the outer space probes.
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Accidentally getting through to a space trucker and promptly told to go fuck ourselves and get registered at the local branch like everyone else. Like a normal fucking planet.
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Have you considered that going to Earth might be like going to the zoo? To see less evolved animals doing funny things like shitting themselves at wallmart (americans), believing 1x1=2 (also american), or getting shot wearing refridgerates shoes indoors (americans, again)?
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>>16730762 (OP)
Aliens might know de ansa to mi question... but maybe also my bruddas and sistahs of /sci/!
>>16745068

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I've read claims that control trials use the term "placebo" but the vaccines are actually tested against an "already safe vaccine" and not saline?
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>>>/pol/512478710
>>>/pol/512478810
>>>/pol/512479166
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>>16733475
Because they can internally test another drug as the "placebo" and this lets them bypass all the FDA regulations with human testing.
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>>16733475
>>16744589
https://www.oregon.gov/pharmacy/Documents/excipient-table-2.pdf
Weird' they removed this from their site. Why would they do that?
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>>16743516
What is the definition of placebo adjuvant group? How does it differ from placebo group? How does this difference matter?
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>>16732557 (OP)
De only ting we can all agree on is dat we don't know everyting... so let's discuss what we don't know!!!
>.16745068

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How dead should you have to be before doctors are allowed to slice out your lungs?

https://archive.is/mdZuu
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>>16742095
This is a fine idea. It would solve a lot of crime. But at the same time organ recipients should be prioritized on the basis of their usefulness to society.
>Stare into their eyes while they feed them treats.
I like this. Imagine going to meet your new kidneys in person.
"Nice to meet you, Kidneys, now make sure you drink plenty of water and get plenty of rest, haha!"
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>>16742290
You are a fucking idiot.
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>>16739056
>triggered tranny immediately responds
pottery
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>>16742095
I like the way you think Anon.
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>>16742095
This could be quite profitable. I wouldn't mind being being a "Street Cleaner" for this purpose.

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formerly good vibrations edition

Previous Thread: >>16717506

This thread exists to ask questions regarding careers associated to STEM.
>Discussion on academia-based career progression
>Discussion on penetrating industry from academia
>Or anything in relation to STEM employment or development within STEM academia!

Resources for protecting yourself from academic marxists:
>https://www.thefire.org/ (US)
>https://www.jccf.ca/ (Canada)

Information resource:
>https://sciencecareergeneral.neocities.org/
>*The Chad author is seeking additional input to diversify the content into containing all STEM fields. Said author regularly views these /scg/ threads.

No anons have answered your question? Perhaps try posting it here:
>https://academia.stackexchange.com/


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>>16744762
LMAO

You have zero fucking clue what you are talking about you stupid fucking faggot. Professional Engineers in the US are the most racist white dude coded gatekeeping system you could possibly dream of. You want an exhaust system for a Buffalo Wild Wings? That’s a stampin’. You want to design a 15’ diameter corrosive exhaust ductwork system for a semiconductor application? That’s a stampin’. You want to design a bunch of fucking toilet drainage systems for an apartment complex? That’s a stampin’. You want to do arc flash labels for a power panel? That’s a stampin’.

Fuck you you stupid retard because 90% of the licensed engineers in the United States that LEGALLY make all the infrastructure run are white males. Go look at any “about us” page for any design firm in the US and almost all the PEs are white dudes. Please, please challenge me on this because I know you are fucking retarded and have zero (0) idea of how licensure and actual engineering works in the US. Cmon hot shot, let’s hear it.
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>>16744811
>>Quantum Mechanics
>no jobs
quantum computing and technology is a rapidly growing field that is one of the very few areas of science that even Trump actively supports and invests in
there are a lot of opportunities in quantum, both academic and industrial, and it's only looking to improve in the future
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>>16745048
You're wrong
>>
My supervisor is leaving academia after a botched penile lengthening surgery
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>>16736021 (OP)
Someting rong in da spaectiem continuum, brudda. Let's discuss!!!
>>16745068

H
Please remember to reference clinical guidelines. Gold standards for thread are as follows:
>Do NOT give medical advice
>Do NOT feed the nursoids
>Do NOT engage with premeds
And most importantly
>Do NOT respond to psych patients

These guidelines are recommended by the AAFP and supported with grade A evidence.
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>>16744980
Hospitalist same difference
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>>16744978
Not quite, the easy mode and one of the labs in particular should give you the answer
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>>16744966
emergency medicine probably
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>>16744966
EM
>CMP
Sorry, wasteful EM. Ordering BMP alone is cheaper and then you should order LFTs separately if a liver pathology is actually suspected
>>
>>16744592 (OP)
Dis tread remind me of a good question my brudda ask in anadda tread... let me link it!
>>16745068

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hOW IS this PossiBle? Scientists
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>>16741210
it makes perfect sense
you are just an ant trying to understand how a dishwasher works
every idea you come up with will be total garbage
but it still might be useful to improve your qol
give it a few million years of evolution and your ideas will be a bit better
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>>16743673
>local speeds always obey special relativity
Universe is not local

>time will pass by faster for everything in the universe, but not all of it
Timelike separated events retain order in every frame of reference. If one event (the end of the universe and every object in it) takes finite time in some frame of reference and the other (gravitational collapse or falling observer reaching the boundary) takes infinite they will happen in that order in every other frame of reference even if the second event happens to take finite time there. The first one will just happen faster, and if it prevents the second from happening then it won't happen.

>it takes a finite amount of time to reach the singularity
It's just a mathematical model, even if it gives you a nice smooth curve it still has to make physical sense for it to be a valid result. Specifically in this case it stops being valid when infinite time or more has to pass in the outside universe which makes no physical sense.
>>
>>16741133 (OP)
a Black hole significantly bigger than the Entire solar system.

keep in mind the solar system is approximately 30 trillion kilometers...
>>
Im not smart enough to understand general relativity.

Is it true that it is purely geometric theory? That is, it only tells you what the geodesics of spacetime look like but nothing at all about energy/matter?
>>
>>16741133 (OP)
Mi bruddas an sistahs, let me know what you tink about mi question!!!
>>16745068

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Alright mi bredren an sistren of /sci/, pull up a chair an reason wid mi a likkle.

Mi been sailin di quantum seas from Copenhagen Harbour to Many-Worlds Bay, but dis Many-Worlds ting... eh, mi cyaan fully reconcile it. You see, quantum theory tell wi dat di wavefunction dance like a reggae riddim — every instrument playin’ at once — until a measurement come an “collapse” di tune. But in Many-Worlds, nuttin collapse: every possibility get its own whole universe, like every possible note of a Bob Marley solo livin in its own parallel jam session.

Here’s mi dilemma: if all di worlds are real an decoherence just hide dem from each odda, den how come mi consciousness only track one bassline? And if probability is just di fraction of worlds where mi see a given outcome, is dat really explainin’ or just changin’ di words pon di label? Plus, dere’s di measure problem: how yuh define di ‘weight’ of worlds in a way dat match Born’s rule without sneakin’ it in through di back door?

Some big physicists seh dis is di cleanest way fi keep di Schrödinger equation pure — no collapsin, no extra rules. Others seh it just push di mystery into a corner an call it decoration. And mi nah even start pon di philosophical side — if trillions of “mi” deh out dere, which one is di real mi? Or is “real” even a ting we can use here?

Mi ask unu: is Many-Worlds di true roots riddim of quantum mechanics, or just a likkle dub version we like because it sound neat? And if yuh don’t rate it, what’s di better road to take? Just keep it mathy an no pop-sci fluff — mi want pure ital physics talk here.
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>>16745068 (OP)
Me tink dis board in't as sharp as de /pol/ folks med me tink... nobody have de ansa!!

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Why isn't this board more hands on when it comes to science ? Should have named it Science & Engineering instead of math. Maths has a tendency to open the door to a lot of pseudo philosophical schizo blabber no one wants to read. Can /sci/ do science with its own two hands ?
>>
if you want to build shit then >>>/diy/
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>>16744935
kek, bodied that freak!
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>>16744935
fpbp
>>
>>16744917 (OP)
I wonder what you guys think of this??
>>16745068

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Curb Your Materialism
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>>16744675 (OP)
>>16744782
Retarded hippies see pretty shapes and learn about fractals then suddenly they forget one of the first things they learn about math:
A train traveling southeast from Chicago at whatever miles per hour follows the same general equation that you would use to figure out if you're gonna pay the rent on time.
The spiral on a nautilus shell grows logarithmically for the same fundamental reason certain galaxies have a vaguely logarithmic shape.
Some contrived hypothetical about the population of immortal rabbits follows the same sequence as another contrived hypothetical about frogs hoping over lily pads and that matches some contrived way you can arrange sanskrit poetry because they're all asking the same question.

Math is just downstream from logic and it's simply a way to express a relationship completely devoid of context.
Many unrelated sets of things have the same basic relationship within each set. That doesn't mean the sets have anything to do with each other.

This isn't some profound spiritual insight.
1+1=2 regardless of whether it's apples or oranges or dragon dildos.
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>>16744967
ironic that you dont really understand math. I am pretty sure Pythagoras and Archimedes were a tad bit above your level and IQ
>>
@16745054
horrible bait anon
>>
>>16744675 (OP)
Pantheism is cope
>>
>>16744675 (OP)
Thoughts on the following?
>>16745068

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Reminder - Earth is the only planet that we know of that has a perfect solar eclipse, since our moon happens to be about the exact same size as our sun when viewed from the Earth.

Nowhere else in the universe does this happen.
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>>16706883 (OP)
eh, since the moon is moving away from us that shit will cease to be in due time
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>>16741509
Hundreds of millions of years is "in due time"?
>>
>>16706909
Leads to a reasonable question, what are the chances? What are the chances of this and life at the same time? What a strange place we live on.
>>
>>16706883 (OP)
um no
>>
>>16743270
>what are the chances?
they are not that small, like 0.16%
considering the size of the universe it's pretty common
>What are the chances of this and life at the same time?
no clue about that, but the fact that life happened here, where this happens and also we only have 1 moon is odd
perhaps this combination affects the type of life

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the unveilings of all universe mysteries from quantum physics to the paradox of divine .
the call for truth for oppressed ,requirement of computer experts for securing voice on other platforms.
>>
await the main mysteries like quantum physics, why nothing cant exists perfect logically which proves the god existence finally(the mystery waited for thousand years),and all, requirement of smart peoples and experts in all field like computer or science or even mystery answer seekers, to work alongside for truth.

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Which is the superior form of it? PEDMAS?
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>>16744965
And instead says you should be able to understand how I solved this
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>>16744973
"He is like the fox, who effaces his tracks in the sand with his tail"
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>>16744951
It just reflects grouping.

PEMDAS is taught as P E MD AS. If either MD or AS are present they have equal precedence. A bracket without a symbol is just an implied multiply.

It's 9.

You don't look at 5 + 6 - 10 + 8 -3 and do
(5+6) - (10+3) - 3, do you? No, you just go from left to right. Or you consider the minus to be an implied negative sign for whatever number comes next.

Same with multiplication and division.
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>>16744951
Correct. Stop writing equations like a fucking baby
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>>16744942 (OP)

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There are brilliant high iq savant level Chinese mathematicians in China, right now, who still worship Mao in their bathrooms, believing him to be a god, like how the Kims are worshiped as gods in North Korea.

How does this make any sense?
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>>16736968 (OP)
Mao was awesome. Lern 2 history
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>>16742098
He had lice in his crotch
>>
>>16736968 (OP)
>How does this make any sense?
It doesn't.
You should stop believing CIA propaganda.
Probably read the little red book instead.
>>
>>16736968 (OP)
Beware the smart idiot.
>>
>>16736968 (OP)
>who still worship Mao in their bathrooms,
They are just pervs who would fap to the craziest things.


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