The new /sci/ wikihttps://4chan-science.fandom.com/wiki//sci/_Wiki(More resources in replies)
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.
for anyone in the orgo industry or the med chem industry, here's a leak to give yall a leg up
/sqt/ - simple questions thread (aka /qtddtot/)Previous thread: >>16893204>what is /sqt/ for?Basic questions regarding maths and science. Also homework.>where do I go for advice?>>>/sci/scg or >>>/adv/>where do I go for other questions and requests?>>>/wsr/ >>>/g/sqt >>>/diy/sqt etc.>how do I post math symbols (Latex)?rentry.org/sci-latex-v1>a plain google search didn't return anything, is there anything else I should try before asking the question here?scholar.google.com>where can I search for proofs?proofwiki.org>where can I look up if the question has already been asked here?warosu.org/scieientei.xyz/sci>how do I optimize an image losslessly?Comment too long. Click here to view the full text.
Did humans always find animals to be cute or was it parallel evolution as a result of animal husbandry? I imagine there is little evidence on account of writing of sufficient quality appearing too late.
>>17034382[math] n \rightarrow p + e + \overline{\nu}_e [/math][math] n + \nu_e \rightarrow p + e [/math][math] p + e \rightarrow n + \nu_e [/math]mathwise, a particle going forward in time == antiparticle going backwards in timereorganize your particles, ensure 4-momentum conservation, and voila(observe the lepton number conservation)
If gravity is not a force but only the distortion of space-time due to mass, then why does there need to be a Higgs particle or field?
>>17034817IdkHumans find human babies to be cute and the babies are evolved to be cute to promote the baby's survival. We're evolved to like cute things. Lots of animals like elephants and dolphins probably find other species to be cute too. Cute girls are also advantageous, cause eye candy makes boys happy.
>>17035280Physicists want to force a concept called local gauge invariance into Lagrangians that they care about cause it leads to the right equations like Maxewell's Eq, and it also works for the strong force too. Using it forces one to tack on a massless gauge field to the Lagrangian. For electrodynamics (E&M)and chromodynamics (strong), this is fine and the photon and gluons are massless. But the Z and two W bosons for the weak interaction are not massless. One could ask, is there any way or case to incorporate a massive gauge field with local gauge invariance?The Lagrangian T-U for a Higgs particle has symmetry to it (like an even function), and the Higgs potential U has continuous symmetry including about the ground states, so like if the two parameters are x and y where (x_min)^2 + (y_min)^2 = constant. You can "break" the equation symmetry by doing a variable change or transforming about any one of the infinite ground state solutions of the aforementioned equation. After expanding, you'll find the Higgs particle pops out (also something called a Goldstone boson but wtv)When you try to enforce local gauge invariance before all of this - meaning you have to also add that massless gauge vector field like the others - performing the variable change to break the equation symmetry will not only create the Higgs, but the terms associated with the added gauge field now have a non-zero mass associated with it. The end result is a Lagrangian with local gauge invariance and a massive gauge field instead of massless. So if the Higgs particle exists, then there exists a way for massive gauge fields to have local gauge invariance, the weak in particular.The Higgs also interacts with fermion fields - which start out as massless - via some Yukawa potential, and again by rewriting it/breaking the symmetry, you can give them mass. Gravity doesn't endow mass to anything, it just describes what happens when you do. Interaction with the Higgs endows mass
Can you answer that question?
>>17033876>a collection? elements? what are those?whatever you want (almost)
>>17034854>A set is defined by the set
>>17033905what is a container
>>17035310That which contains.
>>17035315that would be?
If Birds are descendants of Dinosaurs, how come virtually all dinosaurs are Reptilia, and virtually all birds are Aves. Checkmate Athiests...
>>17035317Aves are included in Reptilia.
-Reading causes micro schizophrenia: you just sit and watch scribbles that have nothing to do with reality.-Reading fucks your memory because you will be expected to put your brain on paper and remove your brain's memory, which makes it weak.-Reading causes you to focus on the abstract, not the practical, which means it's never useful in the real world.-Reading fucks your eyes.-99% of all texts have no plot.-Reading makes your brain focus on the linear nature of scribbles, unlike TikTok, which makes you focus on the exponential nature of videos.
>>17035222>People mostly read books in an attempt to signal that they're smart.reading books only seems performative to those who don't read. many of us readers have been reading since elementary school. we're just built different i guess.
>>17035227>heh... I've been reading hundreds of pages of filler and repeated info per day for decades now so it's not a big deal to me
>>17033659I've talked to someone who read a novel with themselves written into it. Hidden details, impossible knowledge of the reader. We worked through it and came to the conclusion that the number of people that read the novel was very limited; the writer could think ahead about who would observe it and craft it accordingly.
Reading is how dead people try to mind control the living
>>17033659Reading also makes you plagiarize. Name one idea you came up with that no one else did first....True independent thinkers independently form the axioms of logic, then set theory, ect ect
Remove HR edition.Previous Thread: >>17020803This 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!>If you have a question, before posting, read some of the older posts and ,if you can, try to answer their questions on your post. That way the thread isn't an endless log of unanswered questions.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/Comment too long. Click here to view the full text.
>>17035182Mostly I get up in the mornings due to habit and something like momentum
>>17035183yeah can be hard to change that.
>pivot to industry>think I may be doing alright for myself>click some YT vid about STEM careers>check comments>"...It is known in the circles that only bad PhD students end up in the industry. Those people lacking curiosity, ambition and intelligence">feel like a failure againI mean the poster was not wrong but it stings anyway
>>17031333>on a level far above a juniorwrong, agentic code is dogshit. Yes, the frontier models too>Even a guy like Linus Torvalds has made a 180 about its usefulnessNo, he just said it's a powerful tool and it will not be banned from use in linux, which is a perfectly reasonable and rational take. That's very different from him advocating people send LLM slop PRs his way, though it did get twisted into that my Musk's army of indian shills of twitter
>>17030118If you’re in the United States, then make sure you are able to get a security clearance before you switch into photonics, meaning you have citizenship, haven’t been arrested, don’t have family in Iran/Russia, etc. The hiring in this field has slowed down in almost every sector except for defense, so make sure you can actually work in that field before going into photonics.As far as whether or not you should switch, photonics isn’t a bad field for job security, and salaries are decent (a fresh masters graduate could probably expect $85-115k depending on location), but you’re going to be extremely geographically limited on where you can find a job.
Is this actually happening to us humans?
>>17035287That shit was more scientific that all the mumbo jumbo about dark matter/energy today.
We don't live in a state of overabundanceThis may be happening to rich idiots but the overwhelming majority of humanity is living hand to mouth one meal away from starvation
>>17035302Those segments of the population seem to be the ones that behave more normally, but the 'first world' is getting fucking bizarre in the same ways Calhoun's mice
>>17035164I've jumped into Asia in the far future, and some places are really bad with overpopulation. If energy and resources change over time with an increasing pressure of a population, it causes despair. One way they ignored it is through percentages of the mass over wealth still holding up the public to a death scene.
>>17035301>never been replicated>never been independently observed>most findings never even peer reviewed It's about as scientific as the guy that tried to recreate Rapture for his pet hamsters.
How is the force of gravity transmitted? If it’s through gravitational waves which have wavelengths that are millions of miles long then a rock falling 1 foot would fall between the waves and be unaffected
>>17035030How is it transmitted by mass? Mass isn’t reaching out and commanding the rock to fall to the ground
>>17035030That's a gravity wave, not a gravitational wave
>>17034975same as magnets
>>17035109We don’t even know how magnets worked
>>17034975>How is the force of gravity transmitted?According to general relativity, gravity is not a force at all. You are not being 'pulled in' by gravity. Rather, you're following a straight line in spacetime ,which is called a geodesic. A massive body creates a spacetime curvature around itself. Objects that are then seemingly "attracted" to the object are actually just following a straight line in this curved spacetime. A satellite orbit may look curved, but it's actually a straight line in spacetime, because it's the spacetime that's curved, not the orbit.A rather simple way to visualize curved spacetime around a massive body is to imagine space continuously flowing into the object over time (pic rel). When you let go of a rock, the rock isn't 'pulled in' by Earth. Rather, the rock is dragged by the flow of space into the Earth. The rock doesn't "feel" this flow. It's, in fact, not moving at all. The rock sits at a single point in space, while the space itself shifts towards the Earth. The rock isn't moving, the space itself is moving and dragging the rock to collide with the Earth.Yes, by this logic, Earth accelerates upwards towards the stationary rock. The earth would in fact explode without spacetime curvature and so would every star.>but how does it actually work???In general relativity metric *is* the gravitational field. Write the Schwarzschild metric (single massive body) in Gullstrand-Painleve coordinates:[eqn]\qquad ds^2 = -c^2t^2 + \left(dr + \sqrt{\frac{2GM}{r}}dt\right)^2 + r^2 d\Omega^2[/eqn]For a free falling rock [math]d\Omega = 0[/math], since a free fall is purely radial. We also set the radial part to zero to make the rock attached to a single point in space.[eqn] \qquad dr + \sqrt{\frac{2GM}{r}}dt = 0,\qquad v = \frac{dr}{dt}=-\sqrt{\frac{2GM}{r}}[/eqn]The speed is v is interpreted as the speed of the flow of space dragging the rock along with it. Then the second derivative would recover the Newton's gravitational law.
I could not solve this in 20 seconds and needed it explained to me. I know (but am rusty) on calculus, laplace TFs, Mohr's circle, PID systems, and yet this eluded me. Am I just lacking in the part of my brain for critically thinking? Can you get it in 20s?In fact I'll also say even ODEs and several styles of integration by parts is very difficult from the sole fact that I don't always look at a problem and can piece together what technique will help me simplify or solve equations. I'm capable but lacking the ability to see something like this makes me feel like a total brainlet.
>>17035279>If you have EVER parked in a parking lot with numbers like thisI don't drive though.
>>17035281You're on sci. You should accept that all your experiences are just anecdotal and that we need a double blind study to determine if numbered parking spaces exist.
>>17035192Holly crap, and I was breaking out the finest maths for a minute or two.
>>17035192Holy shit
>>17035192The thing is, 87 isn't "reversible" like the other numbers are
What the fuck were they thinking designing this piece of shit? https://www.youtube.com/watch?v=3dTvUtXhLo0
>>17035260It's a goal issue. The end goal of constructing a pencil tower like this is to make something unique and weird enough to assist with marketing it as an investment vehicle, as well as maximizing return on investment. Because real estate is so expensive in new york, especially at such a marketable location, they needed to minimize the size of the footprint while maximizing the amount of sellable floorspace. With all of that in mind, an absurdly tall skinny tower was the optimal solution. Of course, it's pure garbage for anyone that actually has to be inside of it or god forbid LIVE in it, but that's irrelevant. It was not designed for a human being to be inside of it, it was designed to be viral marketed and then purchased as a line of numbers in a portfolio.
>>17033222Building in NYC costs 10 million dollars a square foot so you make a building and make it 5 miles tall. Long rectangle.I don't know what other answer you're expecting.
>>17033222They probably only managed to sell these penthouses to dumb trash entertainers (musicians, athletes, etc).>>17035293>Building in NYC costs 10 million dollars a square foot so you make a building and make it 5 miles tall. Long rectangle.>I don't know what other answer you're expecting.There is a middle ground between short buildings of low complexity (but high land price) and very tall buildings that are extremely expensive to build because of how technically difficult it is.
>>17035211I don't condone your picture but funnily enough Macklowe is indeed Jewish.
>>17033365>agreed, i like any high and flat looking building, they reallyt fit newyork and makes city looks alive, like they are regular in their structure and chaotic as the group of skyscrapers. The same can be seen in the living organisms, you have specimens which look all the same inside a species and species are different. Or organs and body fibres which are built regularly but the whole organism is fucking chaotic, so fun! The cities look to me this way.https://youtu.be/3dTvUtXhLo0?t=85>>17035219see >>17035307This is only true up to a point. There is a tradeoff between land price (much land required for low buildings) and technical complexity (which increases tremendously for very high buildings).
How do you show him that humanity is smart?
I'd tell him about our vaccines
>>17035298Give him an ayylmao doll!
Did India really land on the moon?https://youtu.be/dim8elzo5vE
>>17034329I bet it did. Bharat is no joke. People here on this chan tries to mock that country, but that country always end mocking them.
>>17034813Post hand
Have you noticed that Moon videos are always from a side, and never FPV, in a contrary to Starship videos, for example.
>>17034813"that country" doesn't have functional plumbing
>>17034329yes, it is super power now with space program n shit
How viable is a mobile death radiation gun with modern technology?
>>17034724Probably one of the funniest news story in a while
>Crawford even talked about concealing the weapon in a large panel truck on the side of which he would paint “Halal Chicken” to lure Muslim victims.
>>17033369>>17033381Holy based
>>17034763Springs would prevent it from going critical.
>>17034645>this anon unironically believes the claims that the Jews don't have space lasersstay ignorant, my friend!
Why do hippos have four toes in each foot but a rhino has only 3? I honestly don't know why one pachyderm would evolve to have an odd number of toes on each foot while another pachyderm that's closely related have an even number
What's the selective pressure for feet though, that's kind of interesting. Especially why do humans have so soft useless feet that we uselessly just use to walk on?
>>17033346are you the "why do we have two nostrils instead of just one big one?" tard?
>>17033399>/sci/ fails at taxonomyEvery time
>>17033934No
>>17033896>Especially why do humans have so soft useless feet that we uselessly just use to walk on?so our tongues dont hurt when we lick soft female feet
