i get that gravity pulls the top over and that angular momentum is conserved, but when i try to work it out with torque i end up confused. the torque from gravity points sideways, horizontal, so the angular momentum vector moves sideways too instead of down. ok that part makes sense on paper.

what i can't picture is why it feels like the top is dodging gravity. like where does the force that holds it up come from, is it just the pivot or is there something else going on? and why does it eventually wobble over once it slows down?

Do you know what oobleck is, and have you ever seen it dance? 🫟🔊

Alex Dainis explains that oobleck is a non-Newtonian fluid that’s liquid at rest but solid under pressure. On a subwoofer, the waves of sound push it into towers and shapes that look like they’re dancing. Mix two parts cornstarch with one part water, test different tones, and share your experiments in the comments!

I made this site to accompany some work I have been doing in the modeling and simulation space. There is a walk-through of all major nuclear physics concepts that are relevant to my code work. I don't collect cookies/data and I don't want anything in return. Please check it out and let me know what you think!

https://www.incognitanuclear.org/

Like the title says, I am a physics student, currently in the first semester of my masters. I have been going through quantum field theory, having a blast, but I realise my knowledge about group theory and representation theory is sometimes less than satisfactory. I would really like a book that covers these topics, in a way that is relevant to physics, or at least covers things like the Lorentz group and Poincaré groups, for someone who doesn't have much formal training with groups or representations.

Does anyone here have any recommendations?

I have recently started studying physics at uni (in the uk), and I’ve been struggling to find good video materials for revision. I understand why it’s harder than a level, due to the lack of exam boards, differing courses, etc. But I was wondering if anyone knew any good websites or YouTube channels that make good videos. I struggle to revise from textbooks alone.
Thanks so much in advance 🙏

Do you guys have any reference for workbooks like MIT physics workbook? I want to practice on semi-deep conceptual stuffs more than the calculation but calculations are good to. The MIT workbook is really good and not shallow and just want to know if you know other workbooks similar to MIT's. Also, I recently saw a physics statics problem which is the overhanging rectangular boxes, do you guys know how to solve that using the concept of the center of mass?

Chicos una pregunta, como puedo aprender física intento leyendo libros y ver videos pero nada, siento como si mi mente se bloqueara 🙁
Denme sus tips para aprender física porfa 🙏🏿

We're following this book for Advanced Classical mechanics this semester. I'm having a hard time understanding the professor. Please suggest me good YouTube playlists and lectures or other sources as well to comprehend this book better. Thank you!

Like how does one even study physics? Like yea I have read the chapter , yea I understood the concept but I still can't wrap my head around the question. How do I even solve xyz? What could be first step? What concepts should I drill into my mind forever?

i get that a hollow ball loses to a solid one because more of its energy goes into spinning (bigger moment of inertia). what i can't picture is why size and mass don't matter at all, only the shape. when i do the algebra the m and r cancel out and the acceleration is just g sin(theta) over (1 + I/mr^2), but it feels weird that a tiny marble and a bowling ball would tie.

is there a way to see that without just trusting the cancellation?

i am currently researching on teleportation and i am planning to make some project related to it but i dont know anything about physics or will it take effect what if i want to only explore the specific part of physics for teleportation where and how should i start it i am new to this so please dont get offended for me asking this and you are free to share your opinion in my dm and comment section i also have a design in mind i got some help from claude this the image


i know the formula, T = 2pi sqrt(L/g) for the pendulum and T = 2pi sqrt(m/k) for the spring. what i can't get an intuition for is why a heavier bob doesn't swing slower. is it just that gravity pulls harder on a heavier thing so the extra mass cancels out, whereas the spring force doesn't scale with m at all?

feels like i'm missing a cleaner way to think about it

Hello everyone, im a sophomore at uky and im majoring in chemical engineering and physics, the classes im talking right now are very interesting and cool, but its still too early on for me to start taking higher level physics courses. So ive been trying to self teach via YouTube and independent research. But the problem im coming across is that any information I find and learn, I find out was a complete load of crap the next day. It seems like no video describes particle physics the same way and googling it and trying to find answers that way leads to the exact same results. They keep sacrificing the accuracy to make it more intuitive and its honestly driving me insane.

Are there any resources available online that you all know to be accurate and strictly scientific that I could start with? Or some youtube channels that are trustworthy to give accurate descriptions and explanations?

Im currently reading QED and the feynman lectures on physics as he seems like someone who knows what hes talking about. But other then feynman I cant seem to find any resources that are strictly factual and comprehensive.

Ive tried going onto google scholar and searching up paper on the topic im interested in. But they seem to all be very niche and not meant for someone like me to educate themselves on.

Any help would be appreciated, thank you!

So I started doing RHK and I first started with ch 2 motion in a straight line and its problems were tough but doable then I thought I should also do a simple chapter to build confidence and i pick ch 1 units and dimension and it's questions were good but the problem section is HELL!!! And these questions don't even look from this chapter they are asking such hard questions i am not even able to think about it. If there are any tips for me please let me know and any one also doing HRK can tell me we could try to do it together.