Physics Definition and 985 Threads

Numerous curiosities that all have answers hidden in physics.

For starters, Im just an average student who just so happens to take an interest in physics. Yet this does not stop me from trying to gain more conceptual clarity on it. As a student, I feel I lack on explaining learnt concepts and discussing it. I believe this forum will help me overcome this...

PADME previous papers arXiv:2305.08684 (hep-ex) [Submitted on 15 May 2023] Status and Prospects of PADME Comments: 6 pages, 12 figures, proceedings from Moriond EW 2023 Subjects: High Energy Physics - Experiment (hep-ex)...

TL;DR Summary: Some universities offer online MSc and phd in physics,are they wirth it? I am what you would describe as wannabe physicist, i like the topic and want to study it but in my country there are no reputable universities that teach the topic in advanced lvls. So can i study it online...

I've noticed lots of physics professors reply before you finish talking. Not specifically talking about questions in a lecture etc, I mean more generally. Not sure how common it is in other disciplines or why, but generally they don't tend to let you finish. As a result often when someone has a...

Set up the force equations: (1) ##mgsin(\beta) - T = ma_{1}## (2) ##TR = I_{s}\alpha_{1}## Multiply (1) by ##R## and isolate ##TR##: ##R(mgsin(\beta) - T) = R(ma_{1})## ##mRgsin(\beta) - TR = mRa_{1}## ##TR = mRgsin(\beta) - mRa_{1}## Plug ##TR## into (2): ##TR = I_{s}\alpha_{1}##...

https://www.nobelprize.org/prizes/physics/2023/summary/

Hee, I believe I have to introduce myself here?😂 So my name is Kate (short for my real name haha). I’m still a teen and interested in physics. I’d like a mentor or something but idk where to get one 😂😂 Well, that’s all for now, Kate

m * g * h + (1/2) * m * v² = m * g * y Simplifying the equation: g * h + (1/2) * v² = g * y Substituting the values: g * 0.614 + (1/2) * v² = g * 2.73 * sin(26.7°) Now, let's solve for v: (1/2) * v² = g * 2.73 * sin(26.7°) - g * 0.614 v² = 2 * (g * 2.73 * sin(26.7°) - g * 0.614) v = √(2...

I received my degree some years ago. Been very focused on optics, astronomy, programming.

My attempt is: Archimedes' thrust on the balloon minus the weight of the air inside it is F=(\rho-\rho_{\rm in})Vg, where \rho_{in} is the density of the hot air inside. Now we have, in general, \rho=\mu {n \over V}=\mu {P \over RT} from the perfect gas law (\mu would be the molar mass of the...

The question : A car and a truck are both traveling with a constant speed of 20 m/s. The car is 10 m behind the truck. The truck driver suddenly applies his brakes, causing the truck to slow to a stop at the constant rate of 2 m/s2. Two seconds later, the driver of the car applies their brakes...

Interested in race car physics whether it be asphalt or dirt CT and chassis set up and all things racing .

hii guys I am studen of physics in high school of Seattle.

Hello, I am new to this website and just don't get everything yet (like attempt to a solution). I'm in the third grade of highschool and this is my first year of having physics as a apart subject.

Consider a pendulum swinging at the North Pole in an inertial frame of reference xyz with the x and y axes in the plane tangent to the pole and the suspension placed at elevation z = l. There is no induction \mathbf{B} and in the chosen system the plane of oscillation xz of the pendulum is...

So I started by just figuring out what forces are going to have torque. I know the one heading straight down from the pivot won’t have any and the one going at an angle from the pivot won’t be included in the net torque since it’s at the pivot. The rest of the forces have torque and they are...

So after Newtonian mechanics and electricity/magnetism, what do physics majors study? Also, is there a textbook you can reference me to that applies to that?

I realize of course that this will probably not apply to all physicists, but at least every physicist in my university's math department is very unrigorous when it comes to mathematics. This is frustrating because some of the physics material seems genuinely interesting, but the lack of an...

Hi, I graduated with an undergraduate degree in physics 16 years ago, and I would like to go back and relearn all that great knowledge that I forgot. I was thinking of the following series of books. -Do you recommend changing the order in which I go through them? -Do you recommend adding a...

Basically this is the Exercise In Fundamentals of Photonics book. We also need to use these two equation (1) and (2) As we all know, in order to make the z' as far as possible, we must place 2 lens with this distance I already figure that thank to the initial condition of the first lens...

Help me solve... I'm getting errors here..

Hi, I was going through “Fundamental University Physics” by Alonso and Finn, and I’m wondering how much of it is out of date. Obviously the tone and style is from the 60s, but if I were to go through all 3 volumes in depth, how much of the info would be inaccurate/wrong based on what we know...

Forgive me for my bad explaining. What are all the usual sites/tools/etc. that physicists and physics students use? For example--arXiv, LaTeX, the best journals to keep up with the latest physics research/discoveries, the Feynman Lectures (and Feynman himself), Griffiths Electrodynamics, CERN...

As an undergraduate highly considering graduate school, what are some ways I can still remain engaged with physics and with my institution's physics department despite my delayed start (I cannot take intro physics until my second year)? I was thinking of regularly attending department colloquia...

Hey! I'm Parker, an undergraduate physics student with hopes of going to graduate school. I'm excited to learn as much as possible and to interact with people just as passionate about physics as I am :)

I might have some other questions related to this topic, but I will ask them in further replies. Isotropy of space is explained such as it should look the same in every direction. It's not enough to imagine ourselves to be in the center of the sphere, because definition says that to call space...

I would like to subscribe to a general science periodical (emphasis on physics would not go amiss) other than Scientific American that would explain new scientific discoveries and ideas in popular terms. A hard copy magazine best but digital okay too. Please, no defense of Scientific American...

Hello everyone . Recently i have been thinking about the importance of math in physics . There are many times that i read books or papers that contain tons of hard math and yet i feel it doesn't really add that much to my understanding . On the other hand there are sources that provide a very...

Would a professor in a linear algebra, another upper-level math course, or an upper-level physics course take off points if I don't show steps when factoring an equation expression?

I like creating physics and chemistry problems and i want some feedback on them. What is the most appropriate forum to post them and ask for oppinions?

Hey Everyone, I'm a recently new bachelor student in Physics. I'm around my 20's. I'm from switzerland.

What can AI do, and not do, in physics currently? Can it navigate hilbert space (I don't know what this is, just coming from an HPS undergrad background)? Can it design atomic bombs? Has it solved any problems? I suppose much research uses AI. In what forms?

I learned some computer science basics from the book SICP ( Structure and Interpretation of Computer Programs, Authors: Gerald Jay Sussman, Hal Abelson, Julie Sussman ) and I've witnessed a book about mechanics from the same author called Structure and Interpretation of Classical Mechanics...

I learned physics( MSc) & my academic orientation was elementary particles and QFT . My thesis is about quasiparticle interaction from the quantum field theory point of view. I like QFT, basic particles, quasiparticles, accelerators, plasma and superconductivity.

I have program that i want to follow to try to self learn undergrad physics deeply but i find myself hating when i have to check the solution of a problem set but at the same time if i didn't do that i wouldnt have the time to do other problem sets. So i want to know how much it takes you guys...

Please can anyone help me with problem? I don't know if the work is 0 J

I am a retired associate professor from an engineering college. I am a fan of physics. I have published many papers in scientific journals and mathematical journals. I am very happy to join this forum.

I don't have much to say, at the time I had to drop out of university but I've always been passionate about science and I can't stop reading and thinking about it, especially physics and mathematics.Welcome everybody.

$$ f=\frac{cs}{2\pi}\cdot\sqrt{\frac{A}{VL}} $$

I'm in my last 2 years of high school, and I have to pick a speciality to study before becoming an undergraduate and studying in college. In the future, I'm hoping to become an experimental physicist. My high school offers 3 specialities that are relevant to physics to pick from, all of them...

Here is question + drawing.

Hi, I’m a student studying physics that’s trying to learn more niche information for the purposes of my senior thesis that I have to begin to plan.

So, first of all, why and how are we taking the derivative of the vector r or s as d/dt if t is not a parameter of the equations? Second question is what is the difference between d/dt(r) and d(theta)/dt(r) and also between d/dt(s) and d(theta)/dt(s)? Like, both of these appear at the bottom of...

I approach this by considering the four springs in parallel each with spring constant ##k## as one spring with four times the spring constant ##k' = 4k##. The car is dropped and at the moment its tyres touch the ground I assume that the spring is in its resting position. As the car continues to...

Recently I started making physics problems and I made one that I really like, but I would like some feedback from other people (how difficult it is, how enjoyable it is to solve this problem, what I could improve about it, etc). Here is the problem: A cannon is fixed at height H relative to the...

We all know the four fundamental forces in physics: gravity, electromagnetism, and the strong and weak nuclear forces; and there is now some discussion about a fifth, more obscure force involving muons. But I have a question; could the fifth force be something we deal with every day? Could it...

I will update soon..

Hi folks, 50 odd years ago I did a physics degree - wonder if anything interesting has happened since. Logged in a while ago, but seems lost. Worked in signal processing, still do the odd wee research contract. Nothing right now, thought I would have a look in here.