Physics Definition and 985 Threads

Hi, the task for me is writing a worksheet about Physics experiments in the classroom with a strong emphasis on Inquiry Methods. If you have any suggestion about it (web, courses, people in the field), I'd be very grateful to hear from you. In the meantime, have a safe day.

hi all! I'm a first-year second-semester physics major, problem is I'm very weak at math, often not getting questions right just because I get stuck with the mathematics part. this affects me in both mechanics and electricity what are the most important math subject and tools needed for physics...

Hello everyone, does anyone know any online websites/software to draw detailed physics diagrams, Like the ones we see in textbooks and research papers. I wanted to draw detailed ray diagram of a lens with mentioning all the angles and refracted rays which is supposed to depict a certain...

Einstein's formula for kinetic energy of a photo electron is $$ KE = h\nu - \phi$$ $$ h\nu = KE + \phi$$ Which basically says whatever energy you provide through radiation, a part of it will be used (but I would like to say 'wasted') in overcoming the work-function (that is in cajoling that...

I have been tasked with calculating amplitudes of a B meson decaying to a photon and lepton/lepton anti-neutrino pair ,upto one loop and have pretty much never seen this thing before. I will ask my questions along the way as I describe what I am doing. This factorization theorem seems to go thus...

Does anyone know where one can find complete documentation on how to create physics simulations using Geogebra. I have searched everywhere on the internet and there really isn't any books or complete tutorials on the subject.

The result is supposed to be 12,2 m but every time I get 8,016 m... I used for example this formula >r=m/[(density of air-density of hot air)*(4/3)*pi] For density I used > rho=(p*M)/(R*T) Am I forgetting something? Thanks in advance.

Hi, I am doing my PHD in Nuclear/Particle Physics and I am getting all of the information I am using from papers, which are very specific. I feel like I am lacking general knowledge, which is likely to be tested in the defense. Do you know any book where I can get a better overview on Nuclear...

I need help in deciding on a college to attend for a bachelor's in physics. I live in North Carolina, and I got accepted into the following schools: Appalachian State University Georgia Tech NC State The Ohio State University Illinois Urbana-Champaign University of Maryland College Park UNC...

I had a homework question recently where I had gotten a bosun chair question wrong. It is the exact question found in this youtube video (with the values changed). I am struggling to understand the way 2T is arrived at here (though I do understand this is an example of mechanical advantage)...

Summary:: What kind of geometry/Math do I need to understand to read this book? Hey people! I would like to know what kind of geometry and/or math would I need to understand this book. I skimmed through it( The translated version by Florian Cajori) and seen that it gets technical with shapes.

Is getting a masters degree in physics worth it or is anything short of a PhD at the same level as a bachelors when it comes to job types and prospects?

[Mentor Note -- thread moved to the schoolwork forums] Hi. So I'm a Physics HL student in IB and I'm designing a circuit for my Physics IA. (think of it as a lab/project if you're not familiar with IB) I'm required to have an independent variable of 7 dif. values and a dependant variable. For...

There's a number of "small" (in size) paperbacks which I've quite enjoyed reading, e.g. Schroedinger's <100 page statistical thermodynamics lectures, J.W. Leech's classical mechanics text, etc. Books of this sort are very portable and easy to dip into whenever you get a free 15 minutes or so...

Hi, In my old age I've gone back to study physics at college. I own a really old (1976) edition of Feynman's physics textbooks, but the paper has yellowed to the point where I have trouble reading them, the contrast is low even though the print quality is ok. Is there a printing on good...

Christopher Nolan really has an affinity for Physics! Here's a shot of Cillian Murphy (of Peaky Blinders fame) posing as the eminent physicist J. Robert Oppenheimer. The film is based on the biography "American Prometheus" and will depict Oppenheimer's contributions toward the development of...

Hello everyone! As I was saying in my presentation post, I dropped out of my physics degree very close to graduation - a year ago. I will firstly explain the whole context of my studies/abandon and then provide some of the perspectives I thought about. As an international student in Canada...

Summary:: 12 ton rectangular frame is lowered by a 4 point crane attached to each corner of the frame. Frame will be lowered onto plastic supports, these supports have guiding ramps of 60 degrees to help the operator lower the frame in the correct spot. The frame has 4 feet, one on each corner...

(a) When a taut string is plucked with a finger then it starts vibrating with a transverse wave pattern in the string, which causes the air particles in the immediate vicinity of the vibrating string to oscillate. These oscillating air particles will result in a sound wave traveling in 3...

Hello, I recently Graduated as a Mechanical Engineer from the University of Jordan and I am looking to do a Masters in Physics in Germany obviously I am at a disadvantage when it comes to admission due to my Bachelors, but I am currently fixing that. I am currently taking Courses in Quantum...

Hello! I have finished high school quite a few years ago. I did a physics course that went over nuclear fusion and fission, and I quite enjoyed it. However, I unfortunately no longer have those textbooks (I sold them on as many people do). Now I am doing a bit of programming in the field of...

I actually have no idea how to begin. Thanks for help 😊

[Mentor Note -- Two similar thread starts merged into one] Hey all, I have been working on this project for a while now, which features suspending an object midair through the use of magnetic levitation principles. Cool right? And so I have been researching and trying, even finding ground...

I guess that the reason that objects fall over is that there is nothing to hold it's center of mass. So what I want to do is to work out how fast in Delta intervals it would rotate and fall over.

I have noticed a declining interest for myself in Physics Today magazine. Am I just getting old and grumpy or is this a more widespread phenomena?

Water heater has the effect 2kW and is filled with 2kg water, with a heat capacity of 4,18Kj. The water needs to be warmed from 300K to 400K. How much time does it take for it to warm up? I've tried to solve this, but it seems that i need to know the heat capacity of the water heater, which i...

Hello everyone, I am new here, and I was wondering if someone could provide me with some advice on how I should approach this in a smart way. I basically really need some bigtime advice on the math part of Physics (or in general). I didn't have anyone to really talk with or that'd be able to...

In this thread, @haruspex presented a very deliberate point about the role of electrons in a nuclear fission reaction (he might have said or meant something else but I will present my version of it). The problem that we have before us can be stated, as candidly as my linguistic faculty of mind...

Hello All! I recently finished my undergrad but to be honest I actually feel like not learning anything. I could ace the tests because I knew the "pattern" of questions that would come but now if I open an EM textbook by griffiths, I am pretty sure I understand the topic but struggle a lot in...

I have the opportunity to get a Springer book for free, provided that it is cheaper than 200$. I am considering an introductory one about Solid State Physics, but I have never heard about a valid one from Springer (I know about Kittel, Ashcroft and Simon only). Do you have any suggestion? Thank...

a) a= dv/dt = 2(5*10^5)t+2.8*10^5 2(5*10^5)(0)+2.8*10^5=2.8*10^5m/s^2

P=mv *momentum equals mass X velocity. Light particles or "photons" are said to be "massless". And yet they have momentum. How is that possible? (p.s. I used to know the answer)

I’m sure I’m not the first to ask about this but I could use some advice from the internet: I am a sophomore lost in the world and somewhat recently decided I was going to major in physics with my eyes on grad school. I am on track to get a math minor but I am weighing the trade-offs of picking...

I'm currently a college freshman studying physics. The only previous research experience I had was a virtual one with the EPA on things not really related to physics (it was about 3D printer emissions). I'm trying to look for something for the summer and I've already applied for a bunch...

At first, I tried to calculate the heat energy required by doing this: I realized I should calculate heat energy separately instead of grouping glass and water together so I did this: But the answer is supposed to be 6.29 x 10^4. I don't know how to solve this. Can anyone help please? Thank you

I am working through the wonderful book called University physics by Young & Freedman, it’s seems like a thorough introductory textbook. My question is, instead of waiting till the end of the book to branch out into more advanced textbook that focus on mostly one topic for example classical...

I assume you people are all so preoccupied with all the hard sciencemastering going on that you're missing out on the more basic [sic] research abundantly present under the "Popular Physics" header at arxiv.org. Particularly: Futurama, Marvel's Supervillains and Boltzmann Brains. I'm not...

Without trying to sound too wistful, back in school there was a good selection of miscellaneous problem books like Professor Povey's perplexing problems, 200 Puzzling physics problems, Irodov, Jaan Kalda and all the olympiad stuff, etc. Do there exist equivalents of these puzzle books aimed at a...

Hi, The solution for this question is thermal energy lost= thermal energy gained 0.200x450x(300-T)=1.0x4200x(T-20) T=26 degrees celcius. However, I am struggling to grasp why (300-T) is used. I have always known a change in something to be final - initial. Therefore change in T= Final-...

Suppose there is a nonprofit that wants to order a piece of research in theoretical physics. The research is rather small; it consists in considering an issue and writing a 8-10 pages article. The physicist to do the research will be from a high income country; he/she should be an experienced...

I have a doubt regarding the basic function of vectors and scalars in physics- What is the guarantee that every quantity(measured) in physics can be classified as either a vector or a scalar, and that while performing operations on said quantities, they will obey the already established rules...

in classical physics, when a charged particle oscillates, it emits an electromagnetic wave, and the frequency of the wave depends on the frequency with which the particle oscillates. But in quantum physics, when an excited atom emits a photon, the energy of the photon depends on the magnitude of...

[Mentor Note -- thread spun off from a thread in the Advisor forums] Both Feynman and Einstein have famous quotes about explaining physics concepts to those not well schooled in physics.(freshman undergrad and a six year old respectively). Yet both hedged a bit on this: Einstein Things should...

The correct solution uses angles and trigonometry. My solution is as following: - Suppose the forces exerted by friends 1 and 2 are F1 and F2 respectively. - There are no net force in the x-direction, so F(total x) = 0. - F(total y) = F1 + F2 - mg = 0 (initially). Rearranging gives g =...

Ive been reading University physics by roger freedman, I’m on section 3 motion in 2d. I can solve most of the problems ag the end of the chapter, or at least understand the solutions. But there is a small extra section called challenge problems. There’s only 3 but I found them very difficult...

Greetings! I'm a 4th year physics undergrad looking for a program/tablet that I can write/type equations into and type (or dictate!) sentences into for clarification. I have Word but the equation editor is clunky. I also tutor so being able to screenshare a large area in Zoom and easily...

Summary:: I'm looking for physical models/phenomena that can be replicated in the art of creating sound/music. Hey everyone, I'm an experimental music composer/researcher who just got addicted to watching Youtube videos on quantum physics. The entire field absolutely fascinates me now. The...

When creating sensors to record images from much larger wavelengths of radiation, must the sensor be at least as deep as the wavelength, or is there a way to make it more compact?

TL;DR Summary: Gerald Burns's book: Solid State Physics: is it good for begginers or there are best books? Hello, I am looking for the best book to study solid state physics for begginers. Some one recommended Gerald Burns's book: Solid State Physics. So, what is your opinions about this book...