Theoretical Definition and 999 Threads

Homework Statement 1. Take dimensions of the beam (B, D, web and flange thickness, L) – T- cross section 2. Take the beam span geometry and material properties from the instrument 3. Ensure the beam and load cell are properly aligned and apply a positive (downward) preload to the beam of...

Homework Statement Steel has a theoretical strength of 4 x 10^10 Pa a density of 7860 kg/m^3, Youngs Modulus of 2 x 10^11 Pa and the mass number of iron, the main ingredient in steel, is 56. Calculate the bond energy of the steel using the expression for theoretical strength and surface...

I have three elements, A, B, C, that under certain conditions (rapid heating and cooling) form one ABC phase solid. Sometimes when I add a fourth element, D, I get two phase (AB,CD) solid. Obviously this phenomena is thermodynamically favourable. My guess (still undergraduate) is that there...

OK, before I get into the main question, I figure I should give a little background. First off, this is not something that is going to be made for real. It's for a flight simulator called Orbiter (found here), and in particular for a personal project to update and improve upon the existing...

Hello, Can you guys please guide me and tell me what procedures are necessary to become a theoretical physicist? Also, tell me if you think if its a good idea to be that type of physicist or you think another type of physicist is probably better. Can you also tell me what the average salary is...

Where can i get the theoretical value of MFI for common polymeric materials such as PP, PE, PS, PMMA...as reference?

Hello, all. Perhaps this is the wrong place to post, considering the descriptor for this subforum is "Grad school and PhD help", but I couldn't see an alternative for advice about undergraduate study, so I hope you'll forgive me if this is the wrong place! This is the first forum I've come...

Homework Statement A charged particle moves through a region of space that has both a uniform electric field and a uniform magnetic field. In order for the particle to move through this region at a constant velocity, A)The electric and magnetic fields must point in the same direction B)The...

Please check my road to Physics I am a new member,been to this forum before but was never a registered user (?) Before hitting on the topic, I think it is necessary to describe my background. So here it is: I live in India! I am currently enrolled in BSc MATHEMATICS at IGNOU (INDIRA GANDHI...

is black hole a theoretical concept or a natural phenomenon?

So I have a question or two that I've wondered about for a while and am hoping that this is the right forum to (maybe) get some answers. The thing I've been wondering about is how important the visualization process is in dealing with more abstract, theoretical problems, especially as it...

Hey everyone! I am on a quest to understand the world in which we live in better. In doing so I'm making a stop at Physics. I was suggested the book "A Theoretical Minimum - What you Need to Know to Start Physics". I am in love with this book and cannot put it down. At the moment I am...

Homework Statement What could be the reason why the graph is formed the way it is?Homework Equations τ = 2π(L/g)^(1/2) The Attempt at a Solution I don't know how to explain it. Anyone know why one is a linear and another is a curve?

Moment inertia -- theoretical problem Homework Statement Show that the moment inertia of a hollow cylinder with inner radius a and outer radius b is (1/2)*M*(a^2+b^2), calculated for the center axis. Homework Equations I know that the moment inertia of a non-hollow cylinder is I =...

Homework Statement In "Methods of theoretical physics" from the authors Morse and Feshbach is writen: " The displacement (dx,dy,dz) is perpendicular to the surface if the component displacemetn satisfy the equation: How to prove this relation? Homework Equations the relevant...

If I become a physicist and got my Ph.D in physics can I work more experimentally and application based?

Hi I recently got accepted into a 4 year degree in theoretical physics but I`m kinda starting to worry now that I might not get a job in it. I never really thought about employment before I just chose what I thought was most interesting. But , looking at the coursework, how does learning about...

I'm currently self teaching myself physics and I have never seen physics before this. The book that I'm using is The Theoretical Minimum - What You Need to Know to Start Doing Physics by Leonard Susskind. I plan to be finished with the book by mid next week and my question is what's a good...

Hello I was patent examiner on the Portuguese patent office for 3 years and we have a lot of perpetua mobile applications, so I wanted to find now, the theoretical misunderstanding I'm missing here Imagine you have a track (on a table, on the xOy plane) on which a metal ball would...

I am feeling quite low. Let me start by telling you a bit about myself. As a child I was always asking "why?" I was also very curious. When I got older I found I was not bad at "math" and science. I read books like men of mathematics and biographies on Feynman and I began to form plans about...

My plan is to apply for PhD in the US, and my research interest is in theoretical high energy physics. I'm not interested in computation and want to do formal theory, something to do with Srting/GTR/Cosmology. I have gotten my MSc (2-yr) from IIT Kanpur with CPI 7.6/10.0. I'm going to be taking...

Homework Statement A Pelton wheel is driven by five identical jets. The runner has a diameter of 3,8 m, fixed in a horizontal position. The head from reservoir level to nozzles is 350 m and the efficiency of power transmission through the pipeline and nozzles is 90%. The relative velocity...

I am currently a high school student, I will be graduating next year and I know exactly what I want to do after that. I cannot see myself choosing a career other than physics as it is my passion and it has always been my dream to work as a theoretical physicist. I am now at the point where I am...

Hello, Let's suppose a person has procured a Ph.D in Physics, and chooses to affix themselves to some community college faculty as a physics professor. Is it possible for this person to still do research in some aspect of theoretical physics?

I understand that the dielectric constant of a perfect isolated charged conductor is infinite when its placed in an electric field (generally uniform)... Now I also know that when a conductor is placed between a parallel plate capacitor such that the distance between two plates in those...

Im looking for a good university in Europe do to a MSc in Computer Science. I'm especially interested in Theoretical Computer Science, algorithms & data structures and machine learning. Any recommentations?

Hello forum , so I've ventured to start searching for universities I plan on applying to... (Im still in high school ) and I would like to know what some of the best universities for Theoretical Physics are? How should one plan things out when choosing a University? Apart from Ranking and (ofc...

Hey everyone, new member here, and I was hoping I could get some insight into this question. I'm a physics major in a community college right now, with plans to transfer to a university and double major in physics and math, and eventually go into theoretical physics. I'd really like to minor...

Recently I joined a PhD program in a small unknown university in Asia. In the department, most of the faculties work on material and nano science except a professor who works on Astrophysics. The astrophysics professor agreed to be my supervisor and he asked me to work in the field of X-ray...

What kind of resources does a university provide that are so important to a theoretical physicist? I pose this as a serious question. I know not all fields of theoretical physics are the same, but let's just take string theory for example. It seems to me that string theory at the moment is...

Hi yall, I have a few questions in regards to EM radiation and photon density, or energy density; not sure what exactly the correct term would be here. (1) Anyway, first off, excluding the possibility that a black hole would form, is there anything that would limit EM radiation energy density...

First of all I am new here so hey. I hope this is in the right section. So, I read Zapperz's So You Want To Be A Physicist article and that answered many of my questions. The article But I have not been able to find the exact qualifications to get into any theoretical physics major. I am a...

Okay Hello Forum Im a student in high school atm and I am extremely passionate about Mathematics(pure and computational) and Theoretical Physics I may be young and ambitious and whatnot at this point of my life but I'd really love some feedback to guide me on a clearer path... so I wanted...

I'm interested a lot in physics and math like most people here and I believe I can say I'm also good at them. I'm also more attracted to theoretical, abstract subjects than experimental or more phenomenological physics. I heard that any "real world" diff eq. more complicated than the hydrogen...

Hi all, I apologize if this should have been posted in a math section instead, I wasn't sure. But I'm wondering if homology or cohomology ever comes up in theoretical physics? I'm being introduced to it at the same time in an algebra class and a manifolds class. There's a...

Here's my battle plan: 1: Learn (the principles) of verified models for fundamental physics. QFT, GR, Standard Model, etc. 2: Try to think of what I don't know and what I'd like to experimentally test.I think I'd prefer to get a regular job and research physics in my free time, rather than be...

I am desiring to get a Ph.D. in Theoretical Physics, but I know not what college will be best for me to get that degree in. I am taking all the most advanced Science and Math classes at my School. Calculus, Chemistry, Physics, Anatomy. I live in Southwest Missouri, and my parents have no money...

I graduated from Medical school. Then wanted to pursue my career in research. I chose Immunology and I was doing PhD. But my skills were not good and I was fired during my studies. My supervisor said that I am smart and clever but I don't have skills. I always wanted to be a scientist and I...

Now I am just thinking about pressures and material strengths and I came across a question.To formulate the question I am going to explain a little bit of a thought situation. Normally if you would have a let's say sphere with very thick walls and you would increase pressure of a gas inside...

Title. I want to get a second degree (major) in something besides physics. If I would like to do theoretical physics (in any subfield of it, including mathematical physics), how much would a math major influence in my skills for developing the models?

Okay, so, the college I will probably attend is more of a applied physics program. If I want to go on to study particle physics or even theoretical physics would I have a chance if my bachelors is in applied physics? I talked with the head of physics and he said they have a combined math...

Hello everyone, I am a student in Engineering Physics and I'm currently at the point where we have to choose in which domain we want to specialize. The undergraduate program in Engineering Physics at my university is leaning much more towards the physics part than the engineering part, so we...

The theoretical "Augmentations" One thing that is somewhat common and has to do with medical science and my interests are augmentations, robotic, nano-technological, or even sometimes genetic enhancements. In the science fiction representations people can outperform human strength and speed...

Hello! Recently, I read abt some experiments related to probability which involved tossing of coins.It listed the experiments performed by following- Comte buffon:- 2048 heads from 4040 tosses. J E Kerrich:-5067 heads from 10000 tosses. Karl Pearson:-12012 heads from 24000 tosses. My...

I've often heard on PhysicsForums that career prospects are bright for theorists who paid attention to their math fundamentals and learned to program. That's me! It's also several of my fellow grad students. I suspect many others on this forum are in similar situations, and they may also benefit...

Hi guys! I'm a third year physics student. and I'm studying mathematical physics and particle physics. I thought of doing some research in the field of theoretical physics but the problem is I don't know which subject is most appropriate for me to do research in. I will appreciate it if someone...

howmany institutes are there in India for theoretical physics.

As I play on my new MacBook Pro and stream millions of bits per second through a cable, I find myself wondering about the theoretical limit of serial communication. I have noted that serial communication has become preferred over parallel communication over the years. In fact, it's gotten...

Enrico Fermi was a successful theoretical and experimental physicist. Is this still something that someone can do, or is it practically impossible today? If it is pissible how can someone achieve this?

In a theoretical paper, the primary investigator which is my advisor, is first author, and he also writes the first draft. Me, the second author, and another graduate student have contributed substantially to the numerical simulation. We have another external collaborator which has not...