Self Definition and 584 Threads

I've recently learned about EM waves. One thing I find hard to really get, is how the E and B fields are constantly "generating" each other. I think maybe the key for this is in the following equations, obtained from Maxwell’s equations in vacuum : (source...

This thread is continuation to: https://www.physicsforums.com/threads/self-inductance-of-a-straight-current-carrying-wire.461622/ It's a really old thread, but I happened to come across the same problem a while back and since the old thread does not give the correct answer, I decided to create...

Hi, I saw a video online of a self balancing 2 wheeled car. Basically a motorcycle with a body though has a steering wheel rather than handle bars. It uses two gyroscopes spinning in opposite directions to keep it's balance and was wondering if a similar thing could be adapted for regular...

Hello, I'm in a particularly difficult educational situation. I was "home-schooled" my whole life, and I essentially wasn't taught anything. I was allowed to do whatever work I wanted, whenever I wanted to do it. I never realized how important education is until I got out in the real...

I'm fascinated by the prospect of them, but I can't seem to find much information/progress online aside from like small sensors which aren't quite the same thing. Has there been anything developed that is a self powered vibration generator? As in, it vibrates and then is powered by its own...

Senior in Fall. Is a full course on vector analysis necessary: Stockes theorem, Green Theorem, differential forms, etc. I feel like Griffith's Electrodynamics gives a sufficient overview of Vector analysis in Chapter 1 covering all you need. I've only taken the required Calc 1 - 3 sequence +...

So, having seen micromass's marvelous thread on how to self study mathematics I was wondering whether someone could create a similar thread just about physics? Because it would be really helpful to get advice on how to approach the subject and which textbooks to use and maybe it could be divided...

I have a knowledge of precalculus (Algebra II, basic Trig), and I was wondering what would be a few good books for self studying calculus, primarily introductory calculus (Calculus I, Single Variable Calculus). The books I'm currently looking at right now are Thomas and Finney, Swokowski, and...

Hello, I just finished high school and will be starting a math degree next year. However, I have recently become interested in physics and am thinking of switching to a joint math/physics degree in year 2, so I will want to spend my first year privately studying some select physics books. My...

let f:X to X be and f(X) C X...then f is invariant..if f is invariant, then f is self map on X ? is it true ?

Homework Statement I am a little confused about the how self consistency conditions work and I was wondering if in the following case I have correctly understood the details? Homework Equations [/B] Say we have a harmonic oscillator with a perturbation...

Okay I'm probably way out of my league here because in only 17 and this is my first post, but I was wondering about a self-sufficient car. I know putting a wind turbine on an automobile adds resistance which negates effect. However, a wind turbine builds energy just by spinning, and an...

I am new to nuclear physics and i was just looking out for anything on a non-polluting, high energy source of power when i found this article on the internet about the arc reactor. http://www.quora.com/What-is-the-theory-concept-behind-the-Miniature-Arc-Reactor-built-by-Tony-Stark I am confused...

I need textbook recommendations for self studying physics. I thought of buying the classic Halliday Resnick Walker Fundamentals of Physics, but was confused about which edition I need to buy. I plan to teach myself the whole of basic physics, thus forming a base to further study certain topics...

Hi, Are Calculus I, II, III courses a prerequisite requirement for studying Abstract Algebra? I have read that Proofs and a willingness to work hard is. I am studying Logic and Set Theory and want to study Abstract Algebra in the distant future. I am focused on Foundational and Pure...

I just finished my sophomore year as an electrical engineering major. Now I've got a summer free (well, I work until 4:30), and I'd like to use it to self study something (one or more topics). So far, I've taken Calculus 1-3 as well as an ordinary differential equations course. I've taken two...

Hello, I'm still in high school and I was wondering if you would say that it's possible to learn the entire course of AP Physics 1 in the length of one summer with dedication not being an issue. Also, could you learn AP Physics C Mechanics and E&M WHILE you take a Calculus BC class (I'm not...

Homework Statement Homework Equations[/B] ∫BdL = μi Φ = BA (flux) S= NΦ/i (self inductance) M = NΦ/i (mutual inductance) The Attempt at a Solution a) ∫BdL = μi BL = μi B = μi/L since the solenoid has N1 turns B = μiN1/L b) flux Φ = BA = AμiN1/L self...

My observation is to verify self inductance formula by measuring the resonant frequencies of different coils in an LC circuit.For this, I am asked to use this formula by my mentor : L = 1/(4π^2 . f^2 . C) Here, f = different resonant frequencies, C = capacitance of the capacitor in the LC...

So i did fairly well in both calc I and II, both being proof based (for math majors, and I got an A in both). I am working a job that allows me to read at work this summer, and would like to teach myself some multivariable/vector calc. I am a physics major, but my school requires me to take the...

Hi I have built a gear drive for robotic arm that uses a worm set (worm gear +worm) at stage one. Worm (wheel) is of bronze and worm gear is steel haing a lead angle of appx 8 deg. This set is further coupled to a spur gear set that further increases the torque such that the over all gear ratio...

Hi there, Thank you for stopping by this thread. I'm an engineering student rekindling an interest in Maths. I just love studying Maths in my free time (and sometimes it trespasses into my non free time). I have plenty of fantastic books on my iPad and it's really helping me. However, I have...

I have been over the past three months learning to create a website from scratch while pursuing my Engineering degree. The website is looking pretty good and ranks top on google, has ip/geolocation-tracking and live chats made from scratch. I am not taking it as a course in uni, it's just...

I google searched finite math after reading the course description in my community college course catalog. I am a math major and is fine math work learning or should I use my time wisely and learn other branches of math. Ie ode, pde, proof writing etc. Will my future classes cover some of the...

Hi guys, So, I'm a high school senior about to graduate, and because of reasons, I most likely will not be attending a college next year. However, I will apply to colleges next year for a Physics major. In the meantime, I would like to use my time wisely, and I was thinking that the smart thing...

Hi, Are there any self contained models of the BB that are "front-runners" as explanations for the big bang? I understand that all models have some problems with them, but which models are currently taken most seriously among working cosmologists, and are there explanations of those models for...

Good day, some time ago i asked a similar question but i didnt get a definitive answer. I will try to write as simple as possible, A faraday disc (generator) a constant rpm torque source that spins the generator , now i put some load on the brushes attached to the disc and a capacitor in...

Hello I am a graduate student, with a masters degree in physics but with no impressive marks so far. I am looking for a PhD position in the UK, so far without success. My question is If Supervisors prefere students who are self funded or students who are funded by the university ? Can anyone...

Homework Statement [/B] A tensile load F is to be applied to a tie bar. The tie bar is 50 mm diameter. The surface of the bar has defects resulting from the manufacturing process, these have a maximum depth of 1.5 mm and have a shape factor of 1.4. If the fracture toughness of the material...

Ahoy there. I am twenty years old, and have (as a result of my interest in cosmology and astronomy, and the natural sciences) developed a keen appreciation for mathematics (in physics, primarily). I have always had an interest in the sciences, but lackluster teachers and personal disinterest...

Homework Statement The flat piece is between 2 walls and is pushed eccentrically by force F. what should be the relation between the width x and the height y in order to achieve self locking (that the piece won't go down)? Homework Equations Friction Force: f=μN Balance of moments: F1L1=F2L2...

i am currently self studying qm, and i am trying to plan ahead since i am relatively over with griffiths part1 (which is the theory part) and i was wondering if i should go ahead to part 2 (applications) or should i just keep this for later and attempt to stregnthen my basics in qm from another...

I am currently in high school and have been driven to become a theoretical physicist in an unsure field for quite some time now. I have been unfairly placed in a very easy math class even though I already know it. I have been studying upon subjects such as algebra 2 and pre-cal and recently...

Hello everyone, I am trying to design a self reversing screw. What I am doing is, I am sketching a rectangle and using extruded cut option in Solidworks, cut it along a helical curve. One more and this time in the opposite direction. It comes out nicely. Now what I don't know is, should I use a...

So, I graduated a few years ago with a liberal arts degree and I'm currently working as a programmer. Although I'm pretty good with the practical application of computer programming, my math is horrendously bad. Now that I'm wanting to go back to school, obtain an advanced degree, and change...

I would like to learn calculus from the start. I have had pre-calculus and have basic ideas about limits and derivates(though not very rigorously). Which book should I use? I have the book "Calculus The Easy Way" by Douglas Downing. I also have access to Calculus One by Ohio State University...

Will advanced artificial intelligence ever achieve consciousness and self-awareness? Perhaps in the not-too-distant future? And is it possible for AI to match or surpass the intelligence of human beings?

What are some good electrical engineering books for self study? I want to study electrical engineering and make my own little cpu (don't ask why).

Hello everyone, I have been trying to teach myself GR for sometime now, and while I started to learn through books like Schutz and Hartle, I reached a point where the motivation behind the mathematics they used didn't satisfy me nor did it appeal to me. I think the worst I remember is when...

i plan to take up a subject for self study in the coming vacation (starts 22/1) anyway i want to understand quantum mechanics but my pace so far is so slow, because well, i think the math is tough in most books and there is no appropriate introduction. I am in engineering school, so my limit of...

please recommend easy-going self learn introductory book for quantum mechanics

I am reading the fifth chapter on perturbation theory of Condensed Matter Field Theory by Altland and Simons. This question is about the section starting on page 223. To discuss self energy, they introduced a vector field ##\phi = \{ \phi^a \}, a = 1, \cdots , N##. The action of the field is...

Hello, I'm 19 currently second year in college, After one quarter of taking on many math/science classes and struggling in them, I've realized how my knowledge is both shallow and fragile, even in the subjects I've already learned. I currently wish to reestablish my knowledge from the ground...

I was enrolled in College Algebra for this upcoming winter because the hours will overlap with the class that I enrolled for spring. The reason why I want to learn this, is to refresh my Algebra skills, since I forgot most of it (I only remember matrices, radicals and identities). The purpose...

So I'm interested in studying Electrical Engineering/ Chemical Engineering and I will soon have 3 months of free time before going to the university. What could I self learn online that will give maximum help and boost for me if I want to go Chem E? What about EE? I think the 3 months will be...

I don't know...it must be that I'm too much of a free spirit to work for someone else. I'm thinking, after I graduate with my mathematics BS, I would like to get a masters. After that, maybe I'll start my own consulting firm. Of course, I will get volunteer/unpaid experience along the way...

I am a high school student interested in physics and cosmology, but only have a math education that goes up to 8th grade (linear equations, just real simple stuff) I think I'm pretty goodarn at self teaching and want to get some books so I can work my way up to understandino physics.

Hello! so I'm extremely interested in learning more about physics (outside of physics for engineers since they focus mostly on forces and electromagnetic) What are some good books that you would recommend for me to learn from ? I'm currently a 2nd year Aerospace Engineering student.(about to...

Hello, so I will be starting Calculus 3 (vector and multivariable calc) and physics 1 (intro calculus based mechanics) this next semester. I am interested in using this next semester to go further into both of those topics and I am curious how I would start? I am interested in studying Calc 3...

Hello everybody at the forum. My name is Alejandro, and I am a spanish telecommunication engineer, currently working as technologies teacher. My passion has always been physics, and I even thought seriously of studying a physics degree instead of my telecommunication degree. But now, at my 35...