Physics Definition and 985 Threads

I would be in my second year of my PhD, but I'm a leave of absence. I'm studying for my comprehensive exams, but I'm too shy to ask for help from my peers/professors, a habit I hope to break when I return next semester (Spring). On my break I've realized what an incredible place academia is...

Hello! This is Athena, I am very excited to register for physics forums! I am currently live in LI, NY. Who is obsessed with physics and mathematics. I hope to gain more knowledge and see the brilliant idea from forums!

doing school in canada at a grade 11 university level physics and need help

Ever since i was a child I loved staring out at the night sky. I sat in the library going between comics and cosmology. Inventiveness was born from the two. Looking back, had my interest been supported i may well have turned out a physicist. Alas, there is always time. In the meanwhile, I’ll...

I am solid state physics student.

I am working on completing my degrees in Physics. Thanks for the platform and I hope to learn from you.

Hi I need all the bonding frequencies for all the elements in the human body, IE: carbon-carbon single bond frequency of 1300 cm - 1. It is very important to have the single, double and triple bonds because I am doing something that will require them all. It would also be helpful if someone...

Grateful if someone could explain why, if Newton's 2nd law says F=ma, I've read warnings and cautions in several physics books that mass times acceleration is not a force. Is it because the equals sign does not mean equals as in 2+2=4, perhaps?

I tried 2 ways to solve it but both yielded different answers. i would like to know which is correct and why the other is wrong. thank you. method 1: consider force of each tyre. 5 x 10 = F = 50N. so 4 tyres = 200N = weight method 2: consider the whole car, total pressure = 4x5 = 20. total...

Hello everyone, I'm a fifth-year student at Iowa State University, double majoring in Mechanical Engineering and Physics, and I will be graduating this year. I realized my passion for physics late into my academic career, which is why I'm in my fifth year—I've been working hard to catch up...

I am a Physics adult learner.

Could someone please explain, in terms of the momentum, a rail car slowing down if an item is dropped vertically downwards on to it. Thanks.

I am self studying physics as a hobby with the very broad goals of eventually learning theoretical analytical mechanics, EM, general relativity, etc. I have no specific deadlines. My two questions are: With regards to learning the required math, if there is no particular rush, is it better to...

Physicist (Dipl.) Graduated from Heidelberg Uni in '96. Working in renewable energies.

As the title says, is this year's physics Nobel Prize Physics? Thanks Bill

https://www.amazon.com/General-Relativity-Robert-M-Wald/dp/0226870332?tag=pfamazon01-20

I'm considering returning for a Physics PhD next year, after a year out in industry. I've submitted five European applications (2 UK and 3 mainland...), and have got good references from my old supervisors. I'm considering a couple of speculative USA applications to two research groups I'm...

Hello everyone, being new here I would like to introduce myself briefly. By nature I am a curious and ingenious person with an open mind. Although my professional background originates from finance, accounting analysis and business management, I have been studying physics. My approches are...

Heres my first attempt at finding the forces at D: https://i.sstatic.net/CRv5Ikrk.png

Giveaway. https://www.amazon.com/Gravitation-Charles-W-Misner/dp/0691177791/?tag=pfamazon01-20

This is my solution below.

Mint condition. Happy to up load a list of the chapters papers. The font is small in places, looks like word processing in places I can image that too.

I'm a Bacc. student in subatomique physic, helping and/or asking for help is the best way to learn, so here I am. Glad to be part of this community !

Hello everyone! I am 16yo student, I take IB Physics HL, Chemistry HL, and Mathematics AA HL. At the moment I need help with my extended essay (4000 words research paper) for physics, but I will definitely stay here after I finish. Nice to meet yall!

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.