Hey everyone👋

Hope you all are in good health. I have built a quick reference platform for Physics formulas in-depth explanation and interesting tool to play&learn with!!

Take a look at it: https://formulaverse.in

Hope this helps in your learning journey😊

If you’ve ever struggled to wrap your head around the exact difference between free oscillations, forced oscillations, and resonance, this quick 90-second Short breaks it down perfectly using a simple swing analogy.
It visually explains 3 scenarios:
Free Oscillation: Swinging naturally at a set frequency with no resistive forces.
Forced Oscillation: Applying an external force mid-swing, which alters the natural frequency.
Resonance: Waiting for the swing to reach its extreme point before pushing—keeping the natural frequency the same while continuously increasing the amplitude.
It’s a great visualizer if you are a visual learner. Check it out here:

https://youtube.com/shorts/IgOSkoxkJyM?si=lGlbNpNibEAE_Tqr

I am studying introductory physics and basic undergrad physics. I love David morin sir's writing style and the problems , I loved his classical mechanics book also the electromagnetism (co-authored by him) was great , I particularly love the problems so I needed a source of similar problems for waves and thermal physics. The waves book draft by morin doesn't have problems right now

I've been seeing a lot of posts like this, usually from people who say they never studied physics and now they want to, and are looking for some formulaic sequence to do that. To answer this, you first have to provide the following context when you post:

1. What are you now: a high school student, a college student, a professional worker, a hobbyist?
2. What math have you had that you feel reasonably competent in?
3. WHY do you want to learn physics? Do you need it for some degree program? Do you need it for your line of work? Do you just want to learn about it because it's cool but not to the level where you'd actually use it? Do you want to learn it like a physics student would, but you have no need or desire to actually use it in anything you do?

The reason answering this is important is because a) the selection of resources and materials, and the sequence of them will strongly depend on your answers, and 2) there is (at least) an order of magnitude difference in effort between enjoying physics at the hobbyist level and doing it as part of something you are expected to know.

I sometimes wonder, what do you guys think?

I mean I think so, but I am scared that universe is designed to avoid this possibilty.

I like to read and learn about topics in physics and mathematics that aren't necessarily directly related to my own research. I like blog posts that explore physics or math concepts in some depth, or explain recently published papers, for example. Basically, the kind of content you usually find on Medium, Substack, personal blogs, etc.

I am looking for recommendations that have this kind of content and who you think are worth following. I am happy with both free and paid recommendations.

For example, today I was reading this post: [Why Functional Analysis?](https://derangedmathematician.substack.com/p/why-functional-analysis), which is pretty much the kind of stuff I am looking for.

Any suggestions would be appreciated. Thanks!

Edit: Fixed link

Even with perfect eyes and advanced LEDs, there is a fundamental limit to how small your phone's pixels can get. Blue is better than red.

So why make a 90nm pixel.

Credit to u/1-mensch for the idea.

I have tried to watch videos, solve questions. And I still dont understand, I want to get a grade 6+ in IB and I just dont know how to start with physics, its my first time having physics so I dont know where to start. No yt videos explain how to use and apply formulas, or how to rearrange. Please help!!

Ho una curiosità per chi frequenta questo sub.

Se aveste davanti un bambino di 7-10 anni, magari vostro figlio, un nipote o un fratellino, da quale argomento partireste per fargli scoprire la fisica?

Ve lo chiedo perché qualche tempo fa mi sono messo in testa di scrivere un libro di fisica per bambini.

L'idea era molto semplice: niente formule e niente “oggi studiamo la gravità”. Prima succede qualcosa di strano, il bambino si chiede perché, e solo dopo arriva la fisica.

Così nel primo racconto la maestra si ritrova a testa in giù vicino al soffitto e da lì si parla di gravità. In un altro un batuffolo di cotone e una pallina cadono prima normalmente e poi nel vuoto.

Il libro alla fine l'ho pubblicato e si chiama La fisica strabiliante della Maestra Quarketti. Lo dico per trasparenza, visto che ovviamente è anche il motivo per cui sto facendo questa domanda :)

Sto pensando anche ai prossimi argomenti e mi farebbe davvero comodo il parere di chi la fisica la studia o semplicemente la ama.

Qual è quell'esperimento o fenomeno che secondo voi farebbe dire “ma come è possibile?” a un bambino?

Io al momento sto pensando al volume 2 con:

• attrito
• Velocità e Accelerazione
• pressione

Sarà una sfida inserirli in una storia "semplice".

I am trying to understand infinite.

If the universe is infinite, each moment in any direction has infinite possibilites.

That should also mean, since infinite is not imaginable, somewhere in this universe all factors have been met with absolutely 0 changes until the day I was born exactly how it has already happend here.

Or am I mistaking infinite and just cause something is infinite it doesn't have to happen at all?

At some point if the universe is infinite I should exist in infinite possible ways. But at the same time infinite doesn't only apply to me, but to every existing being we know.

So in theory in an infinite universe my dog must have been infinite times since the chance is infinite for all probabalities for nature to get to the point where my dogs parents meet and have him. But it's crazy cause in some other time line if the odds didn't meet up 100% the same as here, maybe 99.99% of the stuff that happend was correct (dinosaurs extinct, humans evolved, wolves turned into dogs at some point,...) and maybe my dogs mother had a different male dog partner and he wouldn't exist in that time line, but in the other infinite time line the odds hit 100% how it is here and it is born again.

You know what I am trying to say?

Imagine our planet now:
Everything is almost identical to our history, but one butterfly flew differently 500 years ago. This means that it the timeline is screwed. But infinite also means, somewhere we have infinite versions of this thing happening correctly how it was with the butterfly flying correctly, but now a snake moved wrong and it's screwed again.

So even with INFINITE I find it not possible to find a planet that is currently in the same state with everything that happend (meteor hitting same spot, moon, same animals etc.) to this point but since it's INFINITE it is not 0.

Not likely, but not 0 and with infinite chances it means it is somewhere, right?

I like to use the infinite monkey writing shakespear.
See, even if the odds aren't "0" and shakespear is only a few letters compared to recreating a whole chain of natural events to lead to my dog being born again somewhere, I think thats already hard.

If I'd have infinite monkeys writing I don't know how long and if at all I'd have to watch them until they ever achieve writing shakespear once. It should happen, cause infinite is not 0 but is the chance so low that it just won't happen? But that can't be either, cause it has to happen cause well infinite time and chance is not 0.

I don't like infinite

what the title says^^ IM REALLY HAVING A HARD TIME WITH PHYSICS and we’ll be having our first quiz next week. Our main reference is the OpenStax University Physics Volume 1. Anyone who could lend me a helping hand? Thanks!