Physics Definition and 985 Threads

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...

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.

The reading on the voltmeter is 0. I figure the potential drop through line AB must be the same as the potential drop through AC (since voltmeter is zero). As such, the 10 Ohm resistor has the same as the effective resistance of the parallel branch. 1/10 = 1/8 + 1/R 1/R = -0.025 R = -40 Ohms...

I wanted to join this forum because of my interest in physics and the fact that I am learning it. I would say that I enjoy every area of physics, there is not one that does not interest me. In addition to physics, I am also interested in forensics, mathematics and a little bit of chemistry and...

So I do know that there does exist a generalization of the cross product (the exterior product), but this question does not concern that (and I would prefer it not ) I know that the cross product (that Theodore Frankel, for example, calls "the most toxic operation in math") works in 3D only...

Hi All, My name's Théo I am currently finishing up my Bachelor's thesis at TU Delft and working on some other projects in a research group. I will be posting some questions I have on here and try to participate in as many conversations as I can. I want to build experience in academic...

I'm a mediocre physics student (at best) at an Ivy League institution, and I'm passionate about general relativity. My dream is simply to do research in the field, even though I will never be a superstar or pioneer. Finally, I'm planning to complete a Master's in astrophysics or physics...

Let the radius of the larger sheave in the upper pulley be r1, and the radius of the smaller sheave in this pulley be r2. Given, the larger sheave has n notches in its circumference and the smaller sheave, (n - 1) notches. Therefore, 2*pi*r1 corresponds to n notches, and 2*pi*r2 corresponds to...

Hi, I am Nirmalya. I am from Kolkata, West Bengal, India. I have a lot of interest in Physics.

Hi im a civil engineering student who's always been interested in physics since i was young, am taking classes in physics now.

Hey all, I finished an undergraduate degree in physics (conc: computational) last winter and I'm looking into grad schools and trying to work in field while I take a little time off from school. My physics education might be a little lacking but I am looking forward to growing with your...

Hello, I am Quinn EcSolticia. I value rationality and human intellect; whilst my main interest lies in mathematics and theoretical physics. I am currently an 18 Y/O student, but I have a deeply clarified purpose that guides my life which I do not think might really change very easily in my...

Hello, I am new here. I am Gabriel Mwamlima from Malawi currently in the third year at the University of Malawi

.

an assumption being that since the M ( that is mass is a constant for the vehicle ) and a being the same as if the vehicle were to have been crashed into a stationary obstacle, that F would be the same as if said vehicle were to have been crashed into a stationary obstacle and not another...

I got the hamiltonians for n1 and n2 as (n1+1/2)hw and (n2+1/2)hw. Since the an ensemble is made by N distinguishable pairs of quantum oscillators, the general canonical partition function for the system is 1/N!((sum(-BH(n1))sum(-BH(n2))), where B is the thermodynamic beta. I got to the step...

TL;DR Summary: why is the answer "all of the above"? Could someone explain why the correct answer is all of the above? I understand that Cv implies a constant volume process, but what about the other two?

TL;DR Summary: I have spent all day on these 2 problems but i cannot solve them. Can somebody give me any clue on the solution?

I do not know much about this, please help. My truck seat back cushion is 2" thick. Truck A is ~5,700 lbs from google. 2011 f-150 super cab 6.5ft bed. Truck B is ~5775. 2015 GMC Yukon xl slt. If truck A is stopped and braked and truck B hits truck A going 45-55mph creating a force of...

Which of the following are true for sinusoidal radiation? 1) The electric field and the magnetic field have the same magnitude at the same point in space. 2) The electric field is perpendicular to the magnetic field. 3) The source of the radiation is oscillating charges. 4) The radiation pattern...

Hi! I am Mateo, and I'm interested in physics!