I think in the future I'll be sticking with Grand Unified Physics Memes facebook page for these videos. I have to sift through less e = pi = 3 memes that way.
Antti Autio Isn't it already proven? I mean, they already showed it for more than 17 smallest non-trivial zeros. That's the best experimental evidence we can get right know. Ah, people these days... They don't want to believe anything without a general proof.
@@ty6339 At the risk of getting /whooshed, you can also prove that the first 17 cases of n^2-n+41 are prime numbers, but it is not the prime number sequence. Besides, researchers hope to find the prime number sequence with the help of the Riemann function, so the Riemann's hypothesis is worth proving in general. -- From a dude who is not very good at math
Physics memes come in two categories: ones that are too low brow and memes which aren't in your exact field of expertise and therefore make no sense at all
In astronomy, there are "order of magnitude problems," or "Fermi problems," where, given little data about a quantity, you estimate that quantity using relevant calculations to find an approximation within a magnitude of around 10 or so of the actual answer. In my astronomy class we do these problems fairly often; they are very useful on astronomical scales.
Used to work as the physics lab director for a small Colorado university. One of my favorite parts of the job were the crank physics theory letters we'd get. They almost all have the same form: "Einstein was wrong" (direct quote, word for word) vague appeal to Deepak Chopra style quantum mechanics, that has nothing to do with anything Einstein worked on So magnets are cool huh? free energy
When I saw the astronomers meme about approximating things, I thought of pi*10^7 seconds is in a year, and I always found that approximation hilarious, or I guess if you're an astronomer that dabbles in engineering it would be 3*10^7, so you would approximate an approximation, that's like an approximation^2.
Andrew, I am a 57 year old electrical engineer, ABD in Systems Engineering and now teaching at a community college. If you decide to teach after getting your PhD, you will be an awesome professor. I wish I had a physics professor like you.
I got the astronomers one after studying Introduction to Astronomy and then Star Evolution (both in direct translation from Portuguese). In many cases astronomers has to do 'astronomical' approximations (I know this was a bad one) because the data isn't enough or there isn't any way to collect from another angle, like in other galaxy perspective, so they have to work with a very large error margin.
10:03 einstein sticking with his cosmological model by just slapping a constant on his equations despite all evidence telling him it doesn't make sense
For engineering student pi=3 only when you have to do calculations in your head, for example it is easier to multiply 3x17 than 3.14... x 17. So, only to make rough estimates or calculate an order of magnitude. The rest of the time we leave the greek letter pi
Defining vectors by how they transform (in coordinate transformations) and then generalising that to tensors is good. It's probably the most informative way to define tensors. It's not my favorite way, though. My favorite way is the self-referential, recursive definition: "Tensors are tensor-valued maps of tensors. (and scalars& vectors are tensors)" That first sentence is the real definition, but it's hilariously meaningless. But as soon as you give a base case it builds on itself beautifully. By explicitly pointing to scalars and vectors, you have somewhere to start, first with dual vectors as scalar-valued maps of vectors, and then immediately from vectors+dual vectors you can get arbitrary tensors.
At 5:25 the meme is a vector field made of fingers which has negative divergence (all the fingers pointing towards the origin)-pretty sure it’s nothing to do with the Poynting vector!
C infinity is just a smooth function from complex analysis. C is continuous and when it has super scripts you’re saying it’s continuous on that order of derivative.
You should make a video where you make physics memes. I realize you did that thing with Flammable Maths, but just make a video of you making memes and posting them to the sub.
Astronomers approximate everything. I mean they basically only work in orders of magnitude. I once had an astronomy professor say "...and this is only three orders of magnitude so we can basically ignore it"
5:30 *cough cough* math major here I understand this, del dot F is just divergence and obviously that picture is a field with negative divergence (could just prove by modeling that approximately with some constructed vector field and taking del dot F)
GHOST MUT18 Try talking with whatever mental health resources are available at your school. I dealt with similar and foolishly never sought help. Better to sort things out sooner than later as your grades depend on it! Hang in there and study hard, best of luck!
Aditya Varma No, it would not work like this. It is not so simple. Firstly, the idea of an object changing direction only makes sense when you are considering objects for which classical physics are an accurate approximation of the actual quantum relativistic physics of the object. For such, objects, though, the only way to create blackholes is to have ludicrously high energy densities. The only way this would happen is if, prior to turning, the object was close to the speed of light, and then it turned into the other direction to also travel at the speed of light in a very small amount of time. Or, alternatively, if the object has an impossibly large mass. But this gets into some dubious physics territory, since we could be dealing with accelerations of the order of Planck's acceleration.
I think in the future I'll be sticking with Grand Unified Physics Memes facebook page for these videos. I have to sift through less e = pi = 3 memes that way.
@@dy_physics9183 no u
Why? Isn't reddit like a jackpot for physics memes
Andrew missed my 2.7k upvoted post for a few days ago :(
Victor P. Send it to my email and I’ll review it next time
@@AndrewDotsonvideos Andrew miseed some Twitterer's 1.5k upvoted ok Bohmer meme a few weeks ago
“If I sound sick it’s because I’m a little sick. “
-Andrew Doston, 2019
“The rocket equation, it’s a beautiful thing”
Aiden Watler No astronaut
Aiden Watler i thought i was the only aerospace engineer in the comments
You ever derive the rocket equation?
Bad Beard Bill best day of my life
Yes it is
The "pi = 3" joke in physics humor is the equivalent of "wife = bad" of boomer humor.
Can we get a video of you debunking the theories send to you?
GroggyLP I approve
Please do it
Seconded
I concur
Pls do it
I'm going to write all my integrals as the inverse derivative now
Each and every integrand can't be integrated silly!
@@ganeshprasad9851 I don't believe in un-integratable integrands and things of that nature.
@@FlipJanson_ then integrate this function f(x) = e^xsinx ( without using zeta functions and complex numbers..)
@@ganeshprasad9851 woah dude just take it easy
@@FlipJanson_ I m physics + mathematics student.... (:D)
I want a video of you reading the physics emails you get from amateurs who think they have proved Riemann's hypothesis.
Antti Autio Isn't it already proven? I mean, they already showed it for more than 17 smallest non-trivial zeros. That's the best experimental evidence we can get right know. Ah, people these days... They don't want to believe anything without a general proof.
@@ty6339 At the risk of getting /whooshed, you can also prove that the first 17 cases of n^2-n+41 are prime numbers, but it is not the prime number sequence. Besides, researchers hope to find the prime number sequence with the help of the Riemann function, so the Riemann's hypothesis is worth proving in general.
-- From a dude who is not very good at math
Ψ is pronounced "psee"
Source: Am Greek
My whole life has been a lie.
@@tuna5618 /psi/ the letter ψ is basically a combination of the letter π (or p) and the letter σ (or s)...
As a συμπατριώτης, I confirm.
@@backwards3454 Πολλοι Ελληνες μαζευτηκαμε ρε παιδια
@@proghostbusters1627 Sorry I don't speak science.
Physics memes come in two categories: ones that are too low brow and memes which aren't in your exact field of expertise and therefore make no sense at all
Matthew McNeany yeehaw
Andrew sees actor
"On that note let me end the video here "
thanks Andrew. Love ur vids, they inspire me to keep working at physics!
He's also a physics professor
@@atrumluminarium He's also an astronaut
Man that first meme really got to you didn't it..... π=5m³
10:10 There is another level of this. Comletely making up data to fit (and of course adding weird decimal places, so it doesn't look suspiciuos).
As someone who pronounces it uPUHSI I am UPUOFFENDED
Dude the meme reviews are what got me into your channel, I stopped everything I was doing to stop by and watch! Awesome indeed!
@Deniz Göksu ikr tf is this person talking about
we at the smart people association thank you for your continued support.
@Deniz Göksu Bro you are so right, my memory is shot down in flames xD
@@AndrewDotsonvideos And I will love to continue supporting
Came for the memes, stayed for the tensors
This is a great new format I look forward to seeing what you can do with this!
I'd be honored to have people sending me emails about how they disproved a certain theory. Great video as always Andrew :)
In astronomy, there are "order of magnitude problems," or "Fermi problems," where, given little data about a quantity, you estimate that quantity using relevant calculations to find an approximation within a magnitude of around 10 or so of the actual answer. In my astronomy class we do these problems fairly often; they are very useful on astronomical scales.
Claire Bolda I’ve actually made a video on fermi problems. Might make another
great video as always andrew
making my day way better thanks :))))
This was hilarious! Keep them coming!
Used to work as the physics lab director for a small Colorado university. One of my favorite parts of the job were the crank physics theory letters we'd get. They almost all have the same form:
"Einstein was wrong" (direct quote, word for word)
vague appeal to Deepak Chopra style quantum mechanics, that has nothing to do with anything Einstein worked on
So magnets are cool huh?
free energy
When I saw the astronomers meme about approximating things, I thought of pi*10^7 seconds is in a year, and I always found that approximation hilarious, or I guess if you're an astronomer that dabbles in engineering it would be 3*10^7, so you would approximate an approximation, that's like an approximation^2.
Michael Padgett Imagine approximating e^e^10^1.1 as 10^10^10^1.1
The joke about the QM book falling >>> most of the physics memes
Great video (:
F
(For newton, who is my boi)
I remember when I was so desperate to learn about quantum mechanics, now I just wanna die
Why do I feel like Andrew has been drinking
Andrew: “I’m about to end this whole mans”
Physics textbook: **dies**
Andrew,
I am a 57 year old electrical engineer, ABD in Systems Engineering and now teaching at a community college.
If you decide to teach after getting your PhD, you will be an awesome professor.
I wish I had a physics professor like you.
This is the video I needed to see today
came back because i'm proud to understand the tensor meme at 4:39
deriving/deducing the rocket equations for acceleration, speed and height was last weeks homework ^^
4:20 I actually laughed
I got the astronomers one after studying Introduction to Astronomy and then Star Evolution (both in direct translation from Portuguese). In many cases astronomers has to do 'astronomical' approximations (I know this was a bad one) because the data isn't enough or there isn't any way to collect from another angle, like in other galaxy perspective, so they have to work with a very large error margin.
I haven’t even read Jackson E&M (HS student) yet I recognized it right away because I watch so many of your videos
3:28 your reckless mockery of engineers has angered the ghost of Isenbard Kingdom Brunel
I missed these so much I actually clapped along
No nut November day 26 going strong....
Then Andrew uploads a meme review 🙈
Boris Johnson you may rest soldier
Great video having fun
How is this the first meme review video, I have seen your meme reviews many times in the past....I guess my time machine started work...🤔
For your first meme review video, you did OK. You'll get better though as you do more of them
Thanks for the feedback. The pilot is always a little rocky
You can't even stand up for yourself 😂😭💀
10:03 einstein sticking with his cosmological model by just slapping a constant on his equations despite all evidence telling him it doesn't make sense
Next time you flex with those books in the background, i'm gonna kidnap them and make them switch to engineering
These memes makes me harder than NNN challenge
Its finals week+ this is a physics video.... = studying, thats math right? -Physics Major
As an Engineering Physics student I'm unsure how to react to the pi=3 memes
Right now UA-cam be like
UA-cam: 0 views
Also UA-cam: 55 comments
.....
even as an undergrad astronomy major, we approximate everything.
Lucky bastard.... We did the whole Jackson text in 1 semester.
"whats going on smart people"
cries in year 9 learning energy conservation
Good idea for a video, I hope this isn't the only one you do
So *that's* how Johnny Sins became a physics professor
Can’t wait to use pi equals 5 on my physics homework
Thanks Angela for your kind response.
Everything in this universe is uncertain...
Except for one thing, which is:
How handsome Andrew Dotson is!
I miss watching your videos, even though this is the first one I watch.
In Planck units length is dimensionless so I guess they used these units in the text book, 10e-34 m seems like a reasonable height of a cylinder to me
For engineering student pi=3 only when you have to do calculations in your head, for example it is easier to multiply 3x17 than 3.14... x 17.
So, only to make rough estimates or calculate an order of magnitude.
The rest of the time we leave the greek letter pi
In my astronomy classes I've approximated pi as everything from 1 to 20
the rocket equation IS a beautiful thing
You inspired me to go into physics :)
:)
studying physics is amazing, just try not to hate him too much when shits hit the fan. xD
Defining vectors by how they transform (in coordinate transformations) and then generalising that to tensors is good. It's probably the most informative way to define tensors. It's not my favorite way, though.
My favorite way is the self-referential, recursive definition:
"Tensors are tensor-valued maps of tensors. (and scalars& vectors are tensors)"
That first sentence is the real definition, but it's hilariously meaningless. But as soon as you give a base case it builds on itself beautifully.
By explicitly pointing to scalars and vectors, you have somewhere to start, first with dual vectors as scalar-valued maps of vectors, and then immediately from vectors+dual vectors you can get arbitrary tensors.
At 5:25 the meme is a vector field made of fingers which has negative divergence (all the fingers pointing towards the origin)-pretty sure it’s nothing to do with the Poynting vector!
If you assume pi is equal to infinite, the whole structure of physics breaks down and you cant even
Damn rocket equation. I took my core physics exam last week and one of my questions was to derive the rocket equation. Big bruh moment
10:43 WAIT NO KEEP SCROLLING MY MEME WAS THE ONE ABOUT THE SIMPLE HARMONIC OSCILLATORS NOOOOOOOOOhhh well it wasnt that funny anyways
lol that meme about the fat racist really got me
ψ is pronounced like oo*PSIE*
"He is even wo... ok moving on"
C infinity is just a smooth function from complex analysis. C is continuous and when it has super scripts you’re saying it’s continuous on that order of derivative.
I was wondering where my 900 upvote post was, then I remembered it has a bad word in it and UA-cam dun like that.
I really expected you was to see my meme on Grand Unified Physics :v
More math memes please.
Keep making more!!!!!!!!!! Me and my girlfriend love ur physics meme reviews!!!! We wait to watch them together!!!!! Btw this is the girlfriend!!!!!!
uhm how can distance be energy inverse? like just energy ^ -1? wouldnt that be [M^-1 L^-2 T^2]?
You should make a video where you make physics memes. I realize you did that thing with Flammable Maths, but just make a video of you making memes and posting them to the sub.
Alexander Hamilton i like that idea
What even is a meme? did you coin this term?
Epic Math Time I think I did, but I didn’t want to make the claim
Richard Dawkins coined it in the 1970s
OShit Boomer
@@sunshinedaniela8572 a biologist... of all people
Notice me Lord Dotson
I love these videos even though I don't get every jokes ^^
Astronomers approximate everything. I mean they basically only work in orders of magnitude. I once had an astronomy professor say "...and this is only three orders of magnitude so we can basically ignore it"
Try reviewing more on the Grand Unified Physics Memes fb page
Kelly is a lucky gal. Happy thanksgiving!
6:27 nice save.
the memes he scrolls past...
10:38 I don't quite get it, is it because it's cool and want to learn more or because it's pretty damn hard and want to skip through it
If you don't use dark mode on reddit, you're definitely not an engineer
I am studying introductory mechanics as a chemistry student. Help
I guess Calc 1 homework has to wait.....lol
“Shankar is Dankar” kid over here...
That would actually be the pseudo inverse of the matrix, not the transpose
It's time to get serious
I have my math methods midterm in one hour and I’m watching this video instead. No ragrets.
The delta function is not a function but a distribution
Andrew Dotson That’s been burned into my brain! We were also tested on Green’s function. And Grammy Schmidt 🍏
Explain, Kelly!! Explain!!!
I really wanna quote the sick phrase :(
5:30 *cough cough* math major here I understand this, del dot F is just divergence and obviously that picture is a field with negative divergence (could just prove by modeling that approximately with some constructed vector field and taking del dot F)
Infinite friction to ground would maintain speed If there’s no friction to ground the tires would spin but the car wouldn’t moove
for the first part of the video your comments were funnier than the memes
Professor:Draws Hexagone
Math Studens: LOOK its D6
Physics Studens: LOOK its our boi graphene
Chems students who see benzene: Am I a joke to you?
Got any tips for a 1st year physics major with depressions?
GHOST MUT18 Try talking with whatever mental health resources are available at your school. I dealt with similar and foolishly never sought help. Better to sort things out sooner than later as your grades depend on it! Hang in there and study hard, best of luck!
If an object changed direction nearly instantaneously, could it become a black hole?
Aditya Varma No, it would not work like this. It is not so simple. Firstly, the idea of an object changing direction only makes sense when you are considering objects for which classical physics are an accurate approximation of the actual quantum relativistic physics of the object. For such, objects, though, the only way to create blackholes is to have ludicrously high energy densities. The only way this would happen is if, prior to turning, the object was close to the speed of light, and then it turned into the other direction to also travel at the speed of light in a very small amount of time. Or, alternatively, if the object has an impossibly large mass. But this gets into some dubious physics territory, since we could be dealing with accelerations of the order of Planck's acceleration.
6:27 you're on thin ice man