You can calculate how long a pencil can stand on its tip before falling using quantum physics.
Basically a version of this was on our freshman accelerated physics final, and no one got it right so our professor happily explained it to us the next day.
It was pretty much the same as is described here.
https://thephysicsvirtuosi.com/posts/old/how-long-can-you-balance-a-quantum-pencil/
Whether or not an irregular verb retains its irregularity depends largely on how much it is used in everyday life. If it’s a common word, it’s more likely to stay irregular, because we’re frequently reminded of the “correct” form. If it’s a rare word, the irregularity tends to disappear over time because we simply forget. That’s why “to be” couldn’t be more irregular (it’s used enough to retain its forms) and the past participle of “to prove” is slowly becoming regular “proved” (it’s rare enough to be forgotten).
yes i like language very much
Edit: typo
It’s also interesting how the past-tense of “to dive” has changed over recent generations. “Dived” is supposed to be standard, yet people turn it into “dove” so frequently, it’s becoming the new normal.
Wait, what’s the other option for past tense ‘to prove’?
“I have proven”
Ah, duh. Interesting that it’s moving to the more typical “ed” ending
Exactly, that’s the expected path: the irregular form disappears as more and more speakers forget it and instead, “on the fly”, apply the general rules of word formation in their language. Over time the “regularised” form becomes the accepted, “correct” one.
That would be the past participle wouldn’t it?
Yeah, that’s what I said earlier.
OP has just proven their point.
One of the most accurate and successful theories in physics contains the single worst prediction and isn’t mathematically rigorous at all.
Doing calculations with it feels like doing vibes based maths, and you spend a lot of time doing things like: “oops divided by zero guess I’ll cancel it out by multiplying by zero” and it works.
In engineering we have a simmillar thing for some cases where we replace 0 with a variable that is 0 at the limit but not 0 itself then continue on like nothing happened. It all cancels out at the end but feels so wrong.
Can you give an example?
In control dynamics u have a transfer function and need to determine the Routh-Hurwitz criterion it will sometimes give u division by 0 errors so u sub in a variable and say its almost zero but not quite and continue on like nothing happened.
Eg determining the stability of a system with characteristic eq of A(s) = 3s4+6s3+2s^2+4s+5=0
If u do a RH array u will end up with a zero which then will give u (4*0−30)/0 so u sub in 𝜀 for 0 giving (4𝜀−30)/𝜀 and continue on. That eq obviously evaluates to negative infinity. U are essentially just saying 𝜀 is an infinity small positive number ie it is the number next to 0 on the positive side.
EDIT: If the markdown is messed up the eq should be
A(s) = 3s**4+6s**3+2s**2+4s+5=0
When using ** as super notation
control dynamics
Well, that’s a relief! That’s a completely different kind of engineering than I studied, so I can stop being worried that there was something I was supposed to have learned but didn’t.
Its general mechanical background stuff
My degree is in civil.
Ahh. Mechanical before shit starts to move.
π=√10
π=√10=√g=3=e=c*10^-8
It’s truly the universal constant
Physics in general has not caught up to the fact that locality isn’t a thing. Nobel prizes were handed out for this in I think 22… And people still think the notion of spacetime can be taken seriously. It can’t.
What does that mean?
Which part
locality. what was it supposed to be? and why doesn’t it actually exist? what model “replaces” it, if any?
maybe the meaning of spacetime isn’t obvious either, and I just misunderstand what it means
In short locality states that things are only directly affected by their immediate surroundings. This is provably untrue in quantum mechanics.
Thanks!
You know how you get COVID from being in the same room as someone who sneezes on you or something? It’s that.
Non locality is when you get COVID from someone the next state over.
That the diesel engine wasn’t originally ran on diesel fuel. (In college I was led to believe that it was hemp oil). It was actually peanut oil and later they tried hemp oil.
I’m not trying to be a smartass, but wouldn’t the name “diesel fuel” be assigned after a certain substance was found to be the optimal fuel for a diesel engine?
Honestly, good question and I actually don’t know
I learned women actually don’t have the same access to higher education as men. That misogyny and rape culture is real and heavily affect people’s lives in present day. And that it’s about isolated incidents with bad apples, but about the structures around bad incidents, and how they systematically facilitate bad situations, don’t help or silence victims.
I genuinely believed it was safe to give my peers the benefit of the doubt and assume that their ironically bigoted jokes weren’t their actual views. And it was heartbreaking to realize that that is not an assumption you can make. You don’t know people’s values unless they tell you, seriously and genuinely, straight from the heart. You cannot infer values from ironic jokes, and you cannot assume that the nice people around you share your core values, that you’d otherwise take for granted that everyone but lunatics agree with. You don’t know before you ask.
I learned that humor isn’t always innocent. That not everyone who hears you make an “ironically bigoted” joke laughs because of its absurdity - they laugh because they agree. They think you agree with their bigoted views and values, and your joke further cements their worldview, that everyone thinks like them, everyone else is just too scared to say it openly. That jokes can be used as a weapon to create a culture where i.e. overt “ironic” racism is considered normal, and genuine conversations about real racism is taboo.
None of this was in the curriculum. It came from experiencing the social setting and viewing the effects of a broken administrative system at an “elite” engineering college.
I was not a feminist when I walked into my STEM education, and I was when I left.
I learned women actually don’t have the same access to higher education as men.
You’re right - women have significantly better access to higher education than men, and have demonstrably better education outcomes as a result.
For example, women are significantly more likely to receive scholarships and grants than men in undergrad.
Partially as a result of this lack of access, men have dropped to almost 40% of undergrad students, while women make up nearly 60%. Women also receive more doctorates than men, and almost twice as many Master’s degrees as men.
I’m not trying to minimize the bigotry that you observed (or faced), but it’s objectively false to claim that women have worse access to higher education than men.
That Earth was in fact way older than 6000 years.
Did you believe otherwise growing up?
Some religious people do.
I was a jehova witness an I believed science class was all wrong and that my job was to just get through it without believing it.
Not the person you asked, but it’s commonly taught as science in a lot of Christian themed curriculums, including a lot of homeschool programs. Source: friends who believed it, and seeing the homeschool program of my step-kids. We had to teach facts on the side and introduce them age appropriately to real science.
“It” being Creationism.
Here’s something fun to learn more: https://en.m.wikipedia.org/wiki/Creation_MuseumYes. I grew up in the Dutch Bible Belt, with very strict evangelical parents. They sent me to a Christian school that taught a literal interpretation of the Bible. So I was taught at home, in church, and in school that Earth was created about 6000 years ago.
Nothing mind blowing? Only mind blowing course was Sociology. My professor worshipped Bernie Sanders and I appreciated him engaging his students to do better.
But also, That succeeding in college/university just shows that someone can learn, follow instructions, work in a group, etc. It really is to prepare someone to show up and do the work. I mean everyone is different and there’s just more likelihood of someone being a better person to work with than someone who doesn’t have that structure or ability to absorb info and think.
I don’t think necessarily that people need higher education but it helps. I tell people I think careerwise it helps to have at least two of the three:
- skills
- networking/network
- higher education
Know college isn’t for some people and the people I know that are successful are often very skilled or/and have connections, can make connections to get employed where they are.
Oh and STEM though, I think people 100% need college/university for more specialized fields and STEM like medical professionals, physicists, etc.
My polisci teacher day 1 really hammered in that literally everything is political, that it is unavoidable, and all you do by avoiding politics is giving up your own agency when it comes to the things that you care about. It was 2017, so a lot of political apathy at the time, idk it reallly made it click that every single thing is poltical, based on it or decided by it.
Like not caring about politics is just not caring about how you live your life and giving up any control you have to others. People only realize when they lose something they care about like porn games lol
she was an older teacher, so makes sense it was the ideal she grew up with
It really depends on the line of work if you need higher education or not.
In my work, where we create software in the automobile industry, Only 1% or so don’t have higher education, and even if they can work around it, it shows pretty fast once you look at how they organize their work, code, documentation, etc.
Shale tastes like mud, yes, but it has the consistency of a chocolate bar if you eat a little.
Honestly not bad. Great experience.
Bit too busy with the ole undiagnosed adhd and a hankering for world of Warcraft
You can tell from my transcript the exact week Elder Scrolls Oblivion came out.
For me it was might and magic III, yes I’m very old…
My roommate, RA for the dorm, and I played for 3 months straight on my computer. It was never turned off 24/7 …
My highschool friends weren’t really friends, just people who’d been temporarily thrown into the same unfortunate position as me.
Relevant: https://youtu.be/rGDBTLT9__s
(if I’m honest, this is not his finest work. his videos are usually way funnier than this)
Computer science students multiple years into the course think I’m a hacker for using the linux terminal
I once showed that
trickfeature - opening the terminal - to an Apple Genius Bar employee once. His brains almost fell out of his ear he was so surprised.Classmates of mine who moved to Linux in college, 20 years ago, all graduated at least a semester later than I did. To be fair, I got my pirated copy of everything from them.
Granted, linux is probably much more user friendly now. Although I still see mysterious errors on boot and cannot boot into newer kernel versions. How peculiar.
I’ve used a Linux desktop for 25 years now
Yeah, it’s gotten a bit easier, just like Windows and Mac.
Not that much has changed, and frankly, most of basic Linux really isn’t that hard, it’s just getting people off the shitty windows concepts that is the hard part.
I am getting into Linux now with Bazzite, but back then, Windows was still okay. Nowadays, Windows is as enshittified as MSN.com was back in the day.
What is this even trying to say?
When we had to team up for lab assignments I was working with a like-minded guy and we did everything Linux when the assignment didn’t specifically specify that we had to use windows. The teacher was constantly updating the wording of his assignments and asked us to put a little bit of windows in there. We were way ahead of the rest of class and had plenty of time left to switch the windows parts in and out like nothing. That was 12 years ago.
If it was possible on Linux we used Linux, if not then we used windows. We used a very pragmatic approach, but favored Linux where possible.
We are all pretty much screwed
I know people’s experience varies on this but I absolutely hated high school, and only discovered that I enjoyed learning as a process because of uni. And I’d probably still be small minded and somewhat bigoted if I hadn’t gone. Simply because it forced me to critically evaluate my own views and also exposed me to a number of types of people I wouldn’t have encountered otherwise.
It’s a shame it’s so expensive in some countries, because I think it’s important to have a well-educated society more broadly.
Just how greedy some professors can be.
Like the one that had a publishing deal with Pearson. He wrote his own textbook, charged $700 for it, then made you remove parts from the book so it made used copies of the book worthless.
That sounds like something news worthy with name and everything
If you were to put a big fan on a sailboat and point it at the sail, it would move the sailboat in a similar way as if the wind was pushing the sail.
Which actually makes sense if you understand it’s not the wind pushing but the generated updraft at the sail.
(also not point at, but sideways)
😁
Even if you are sailing directly downwind, it works. That was actually the professor’s demonstration. He said that at the time it was accepted as a physical phenomenon, there were many physicists who said it wasn’t possible, but it was being actively used by some engineers to make jets go in reverse.
Cool stuff!
(I am not in aerospace or sailing, so I was guesstimating)