Physics Definition and 987 Threads

I was pondering the notion of fiction in the multiverse and remembered my fluids dynamics lecturer many years ago telling us all something about quantum mechanics and how the air molecules in the room could all spontaneously move to one side and we would all suffocate. Slightly disturbing and...

Unbelievably complete work (1438 pages!) covering all aspects of p-n junctions, metal-semiconductor contacts, phonon and photon interactions, and the operation of common semiconductor devices from diodes and LEDs to solar cells to transistors and MOSFETs. Hardcover book with flawless dust...

Classic text in very good condition. It is ex libris so contains the usual writing on the flyleaf, library stamps, and a card pocket in back. The spine is free of the usual white sticker of card catalog information, however, because the book was enclosed in a plastic slipcover. As a result, the...

Last time I posted to the forums I was told to use some type of text thing to make equations easier to read for clarity, but I can't figure it out, so sorry if this is hard to read. I know that d = 10-r After making a free-body diagram, I thought the circular force had to equal Tension +...

This is an extract from my letter of resignation from the forum: My belief is that physics has taken a wrong turn, and what passes as science is nothing more than speculation without hard evidence. As a challenger to the accepted paradigms, I can understand how I have ruffled a few feathers...

According to this article, physics Nobel laureates are becoming harder to predict. Let's see if it is the case. I was hoping for any of the quantum information people to get it this year (Zoller, Cirac, Shor, Deutsch, Bennet, Brassard, Ekart, Kitaev) but it might be to early for that. Also I...

Haven't seen one of these before. I'll provide the beginning of a story and replies should continue the story as best as possible. Feel free to use generative AI and let's see how humorous people can get. In the depths of the university's physics department, a group of students discovered a...

Hello, My name is Paula; I am an older e-campus student at Oregon State university. I am taking all measures possible to be able to get through these physics classes as smoothly as possible, so when I saw a link to join a physics forum, I jumped at the chance. I was asked to give an...

I have an unusual situation because my course is too restrictive: I need to take a module called 'Solar magnetohydrodynamics' in the 4th year. For that module, I was told it would be 'benefitial' to also take a module called 'Plasma physics and fusion' this year. This particular module last...

Greetings, I am studying A level physics, and I am now in my second year of the course. I have recently started learning the concepts more intuitively to gain a deep understand of each concept, allowing me to apply it in new circumstances, and this has led to increased results in all of the...

Since component of a vector is a vector, the component should have component. Is it true? If yes,how?If no,why?

Hi, I would like to introduce my HS students to simple Physics Experiments and the Method therein, using tools like https://www.vieyrasoftware.net/copy-of-lessons Unfortunately, not all of the experiments listed there have usable worksheets. One question: do you have any available and are you...

I am Nesrine. I am an electrical engineer holding M.sc. in control engineering and working in IT industry for about 25 years. I started teaching physics foro IGCSE 4 years ago and I want to know more about teaching physics. I am palnning to lecturer undergraduate students. I use academic books...

Roderich Tumulka (a long-time Bohmian) demonstrates in his newest preprint, R. Tumulka, A Vision for a Bohm-Style Theory of Quantum Electrodynamics, arXiv:2409.07784. that for the interpretation QED, the Bohmian interpretation has nothing to offer (apart from speculation called vision), and...

Here's one that is very easy to find and that I definitely recommend. Steven Weinberg, The First Three Minutes. (paperback) Amazon $31.19, I'm asking $15 with free shipping at media rate ($10 plus shipping if shipping is less than $5)...

Hello all, I have a question for those with knowledge of Nuclear Physics career outlook. I am at a point where I need to decide soon. I know I want to go to grad school, I know I want to study Nuclear Physics, but I'm a little torn between which method of study to undergo. I would not mind...

My wife read a bit of this book and lost interest :cry:. The condition is excellent, hardly used, and it looks new, with no creased pages. I'm willing to give this away to someone in North America who hasn't read this all-time classic yet.

Please Help Me With This! I have tried so many different ways to answer it but I just cannot seem to find the right solution to get T1 and T2 for this.

Please be nice! I am new to forums in general XD

Hi, i am a physics graduate from greece and i am trying to think of ways to laverage my knowledge amd skills online. I am specifically trying to find a way to upload mini courses online for people to buy and make some income this way. Do you have any advice on how i should start and do you have...

Hi everyone I'm a mild physics enthusiast but I wonder if people thought time travel was technically possible? And if Nalini's thoughts were sound on a scientific basis.

HI all! New here, have tons of questions about physics :)

I am a retired programmer 1980 to 2012, renovating old houses in Goderich Ontario Canada, which is 40 kilometers south of the Bruce Nuclear Facility, 6,600 megawatts on Lake Huron, also in the midst of hundreds if not thousands of wind turbines. I am a climate change believer and wish to...

Hi everyone. I've had an avid interest in several fields of physics all my adult life, now 79. (Long retired as a psychologist.) My fields of interest include cosmology, astrophysics, relativity theory, quantum physics and philosophy of science applied to physics. I look forward to participation...

I'm not quite sure how to apply conservation of string to this problem, so guidance would be appreciated. Normally as long as there isn't a "sub-pulley" I can do the problem fairly easily but this one tricks me up. Thanks

I'm just google about my curious questions about physics, and then I got here. I'm keen on doing physics problems and other related fields. Hope this place will give me a memorable experience.

I am a senior living in New York state getting ready to submit my college applications. Colleges I Have Looked At: RPI, UoR, RIT, Clarkson, WPI, Stony Brook, and Binghamton My stats: 3/309 in my class 99% unweighted gpa 1440 SAT (790 Math, 650 Reading) (This score is likely to improve (I...

Physics is amazing and excited to be in a community of seekers.

Hello, everyone! I hope you have a great day. I'm from Colombia, and I'm currently in my last year of a Bachelor of Science in Physics with an AGPA of 4.3/5 (Colombian Scale) and 3.6/4.0 (converted using Scholaro). I'm from a top university in Colombia, but we're ranked in the top 2000 on the...

I have gone through this platform and I believe this platform will enhance my learning about physics

I'm Malaysian, and I'm definitely going to study physics. The thing that I'm worried about is that I do now know if I should do my bachelor's in Malaysia then go overseas, or should I just go overseas? I've asked my relatives about it, and they say that my bachelor's is very important and...

I am at a crossroads in my life. After graduating high school, I went into the ministry. I had no plans to continue my education, and I was content with my perfect little Christian-centered world. Eventually, my faith was shattered and I came to the realization that my entire worldview for the...

https://www.umdphysics.umd.edu/about-us/news/department-news/1968-redish-2.html https://www.aapt.org/aboutaapt/Edward-F-Joe-Redish.cfm Teaching Physics With the Physics Suite https://www.physics.umd.edu/~redish/Book/ Univ. of Maryland - Physics Education Research Group...

Hello everyone, just serving up a quick introduction. I took some physics and math classes during, I believe, the Eisenhower administration (anything before 2000 is hazy). Nevertheless, due to a lack of scientific acumen, I will be a taker, not a giver, on these forums. Here's to a second...

…but then I dumbed down in later life :sorry: Here’s to hoping this visit would change that :woot:

What's the difference in content between the two textbooks? International Adaptation and local edition Principles of Physics: Extended, 12th Edition Principles of Physics: Extended, International Adaptation, 12th Edition

retired physicist.

Can I post Operations research problems in Physics Forum? If yes, where, can I post it?

Hello to everyone. I'm an undergraduate physics student and a private teacher.

Came to know about physicsforum by mistake . One of the best ones I made. I was suffering in undergrad. Will hopefully suffer less now onwards.

Reference textbook “The Physics of Waves” in MIT website: https://ocw.mit.edu/courses/8-03sc-...es-fall-2016/resources/mit8_03scf16_textbook/ Chapter 2 - Problem 2.3 [Page 52] (see screen capture below) Question: In Problem 2.3, I have proved the hint equation, and it leads to the complex...

Hi, I start my PhD education, actually offically it was one and a half month. And ı didn't decide to choose to experiment or theoric. Maybe, if you know or study this field,help me to decide. What is this two field advantages in STEM? If ı choose theoric, ı can find a job? Thanks for your answer...

Hi everyone! I finally decided to go down the path of getting my engineering degree. I never had physics at school so I have to do a uni ready program and catch up on most of the course in my own time. Ive been quietly reading here for a while and it's actually been very interesting to start...

I'm a physics and engineering enthusiast! I really love the format of this forum

hi, i love watching videos about physics and mathematics, but i have no practical knowledge, i could not make the calculations or predictions for anything ;)

Hi I am a Physics Graduate and I have qualifiers coming up. Looking forward to sharing valuable info and to learn from this platform.

PF should keep up with the times https://www.livescience.com/planet-earth/nuclear-energy/physicists-solve-nuclear-fusion-mystery-with-mayonnaise :wink:

Hi Friends and Colleagues! It so happened I give classes of electronics in certain local school (which itself is physics-oriented) - as a hobby, once a week, perhaps more than 15 years already. Meanwhile by occupation I'm a meek programmer and years ago I created some programming-puzzles...

Suppose that Bob and Alice decides to do a quantum experiment, more precisely, The Shroedinger Cat Experiment. Alice goes to the Andromeda Galaxy, and wait for Bob’s results. According with the MWI, the wave function never collapses, suppose that in one world Bob found the cat alive, in the...

Hi, I am 10th grade student from Lithuania and I am really interested in physics. Studying further course on my own, but the problem is that I do not have a teacher or helper to ask questions. Hoping to find help here!