Physics Definition and 987 Threads

Degree in chemistry and at one point was a physics and mathematics double major, but life intervened. Never got to finish but still read and work on novel amateur theory. At least, what I would call novel and amateur. My focus is on putting together theory on space-time and quantum field...

Hello everyone, I am a mature student applying to an undergraduate course with a foundation year, and as I finalize my university application, I'm seeking valuable feedback on the content and structure of my personal statement. I would greatly appreciate any insights and perspectives you may...

My question is how come the tension in pulley 2 is pointing downwards. I was under the impression that tension always points away from the mass.

[rant clipped] I digress, meander even...I found this: Autobiographical Notes of a Physicist under physics.hist.ph. A place I suspect not many of you look regularly ;) Which sounds pretty prejudiced I'm aware. :) ) This guy's experiences may well be out of date for the need of todays STEM...

Hi, I have a few questions about the timeline of pursuing a PhD after a master's degree. Applying for PhDs seems quite a hassle as of now because each university has their own set of application procedures, academic requirements and deadlines. I am currently in the process of navigating where...

Hello! As I nervously wait to hear back from my physics PhD applications, I thought it would be helpful to see what you guys think of my profile and the schools I applied to. Note: I am a senior undergrad and will be graduating this upcoming summer. Domestic applicant. Research Field: Quantum...

Studying physics and related topics for 3 decades. Working on a project to better understand the origin of mass, energy, time and charge.

Hello. I write this in regards to enquiring whether you can address various questions I have in relation to acoustics and the physics of sound. In particular, I am interested in ultrasound. I have various questions in relation to it. In particular, I am interested in understanding the nature...

Homework Statement: Could be silly to some, but I am writing a short story and hope someone can help. Relevant Equations: I am clueless, forgive me. Hello all! I tried asking Bing/CoPilot, Google, and visited some medieval war machine forums, but could not find something that could help me...

Not clear how to proceed. Does the cylindrical surface of the ungula need to be considered?

Solution:

Hi, I'm Torque fan. A fan of torque or a fan that generates torque whichever you feel like. I'm a physics enthusiast and I want to further my knowledge on the subject and pursue it as a career if fate has it for me! I also want to contribute to the forum in helping people wherever I can and...

Other ways of wording this finding about the extended SC (Schwarzschild) spacetime: - in the local frame of a free faller, radial distance is given r coordinate difference - in either Fermi-normal coordinates, or Riemann-Normal coordinates built from a free faller at an event, coordinate...

Hi, I am a physics graduate student focusing on experiment related to nanotech devices.

I wondered this when i saw that Robert Penrose its a physicist and a mathematician. If i dont do a math physics degree I wont be effective?

Hello, im a bit confused about the right term in Faradays Law vs the right most term in Amperes Law. They both seem like terms corresponding to a resistance to change, similar to inertia. As in, the induced electric field from a changing magnetic field has an opposite direction compared to the...

Hi all, I've been going over some special relativity as it's a topic I never really studied during my younger years and wanted to get to grips with it, especially since it's such a fundamental part of our understanding of the cosmos. I was reading about Einsteins train lightning thought...

New to the forum, hoping to study as much physics as I can understand. Atomic science interests me, and so does cosmology - but i'm still so new that I don't know enough maths for the latter, and havent got much knowledge on the former aside from gcse chemistry which was over 10 years ago

Fire, Gravity, Electromagnetism, Atoms, DNA, Steam power, Nuclear, Quarks. All of these things have one thing in common. They are fundamental aspects of the universe that humans have uncovered and given names. However, all of these great discoveries occured quite some time ago and as a science...

Just looking around for now, but would love to see links to attempts to define information in physics

Howdy from West Virginia!! If you would have told me 30 years ago that I'd be researching physics and math for fun, I would have said, "Are you high.... and by the way, what is physics?!?" I'm obsessed with all things science, and tickled by all things quantum. I became interested in science and...

Hey guys, I'm a first year student studying theoretical physics in England. My physics modules include a fair bit of python programming and I want to apply to ICGs cosmology PhD in England. Can I escape learning python by choosing maths modules?

So as you can see in the image, I have noted the time in the [time column (s) ] on the table after conducting the experiment at home using the application phyphox. And now, I have some questions to fill in the remaining gaps: The first question: about ΔH (m) : Should I set it equal to zero...

Hi everyone, i’m Marco and i am here to learn about physics! I am a mechanical technician from Italy.

Hello everyone, I am working on this problem and I think I almost solved it, but then I noticed, that I do not know what values I have for dn, n and dθ. Can anyone help me with this?

A question, this. Something I would like to know. Practical physics I think. 'Applied physics' I believe. I wondered at the purpose and efficacy of 'steeling' knives and learned that the process is intended to repair damage to an edge rather than 'sharpen' in the sense of 'create a sharp...

Hi. This is not exactly a homework problem, but I'm posting to ask for help for my extended essay. I am doing the IB (international baccalaureate) program and we are required to write a 4000 words extended essay on any subject. I decided to do mine on physics (through process of elimination...

This is the solution but I do not understand??? How could they just assume the object distance equals 2f? No magnification is given here. We know the candle produces a real image and the distance is limited, so that means it must be somewhere between the principal focus, the center of curvature...

I have been interested in physics for a very long time. Initially in high school celestial mechanics and soon afterwards quantum mechanics. During my chemistry studies I specialized in quantum chemistry at the end of my bachelor and continued to do a Bachelor and Master in pure Mathematics, with...

It is good for the people who wants to know physics and it's beauty

For much of physics, its language is fundamentally math, but to a certain point, does philosophical thinking ever play an important part in creating or exploring physics? It would seem, at least to me, that there is some significant overlap, given that much of understanding physics can't quite...

Hello everyone, I am interested in researching the underlying physics of gene expression. I'm a junior in a math/physics double bachelors program.

in the news String Theory gets Competition: A New Attempt to Solve Physics' Biggest Mystery Sabine Hossenfelder based on Jonathan Oppenheim, "A postquantum theory of classical gravity?", Jonathan Oppenheim et al, "Gravitationally induced decoherence vs space-time diffusion: testing the...

I am a physic Engineer, researcher and I do search on nuclear and paticle physic. I need some basic reaearch on physic at the last years and I belive that you can answer my questions. If not enough these inform me , please inform me which information need you to me. Thank you. Best regards...

Please select up to 3 members who were most impactful in the Physics forums in 2023. This is a popular vote. Polls were created by weighing activity and measure of helpfulness. Everyone nominated should feel honored. Many more could be added to this poll, we can never realistically add everyone...

Alright so here's the deal: I graduated recently (spring '23) from Ohio State University with a BS in physics. I graduated with honors and magna cum laude (3.8 ish gpa). I took the general GRE and got 162 verbal, 165 quant, and 4.5 writing. I spent some time in a master program to pursue...

I have much to learn.

Hi all, I was wondering if there was a reference/textbook where the degenerate perturbation calculation for the Transverse Ising model was treated fully. I want to better understand how in the weak magnetic field limit, the ground state degeneracy only lifts at N'th order in perturbation theory...

Neil deGrasse Tyson has been a great "goto" and respected physicist for me to follow online. I've read Einstein's biography and have been fascinated with the world as theorized by some of the greatest minds and proofs. Recently, I've come across a name I've never known. Admittedly, this is a...

Hi, I had no problems calculating parts a and b, but I am having problems with task c For ##F## I got the following, with ##\vec{r}= \left(\begin{array}{c} x \\\ y \\\ 0 \end{array}\right)## , ##\vec{r}_1= \left(\begin{array}{c} -a \\\ 0 \\\ 0 \end{array}\right)## and ##\vec{r}_2=...

hey everyone. I wrote a code in Fortran to calculate potential values or solve the Laplace equation inside a cube according to the boundary conditions mentioned in the code. this is my code: program laplace_cubic implicit none REAL*8 :: LX, LY, LZ, DELTA, MAX_ERR, ERR INTEGER :: NX, NY...

Hello! I'm in sixth semester of Physics undergrad, I'm looking for a place to talk to other physics students and discuss interesting problems and questions. I'm happy to meet you!

I found the x and y components and then divided the two equations to see if I can solve for the angle but that did not work. I have been at this for two hours, please help me.

I am a math PhD working in software/technology who is a physics hobbyist. I’ve gone through MIT 8.01 - 8.05 courses and watched and worked through a number of additional videos and problems. My interest is mostly getting exposure to more ideas through the community. I don’t plan on trying to...

Hi, unfortunately, I am not getting anywhere with the following task and I try solve it

I'm wondering what are in people's opinions the "must read" papers of Einstein. I concentrate more on general relativity but also other stuff. Reviews by Einstein and maybe other important contemporary papers would also be welcome, as well as maybe modern commentary on them.