Self Definition and 561 Threads

Hello, I am a self-learner. I am teaching myself calculus through different sources on the net, but I feel I book is handy. Can you please suggest me a book on differential & integral calculus which: (a) I can self-learn (b) Has a lot of examples (c) Clears out the concepts through...

In October of this year i will start with math major and i decided to prepare myself in spear time. In my faculty there is no such thing as Calculus but rather you go strait to the analysis and you pick up calculus along. (There is singe variable calculus in high school). In first two years...

I understand it has something to do with the index of refraction being directly related to the intensity of radiation, but on a more fundamental level, why?

Hi everyone! I am a high school junior in New York, now finishing AP Physics C, Calculus BC and multivariable calculus (introductory). I want to pursuit a physics/math career in the future, planning to be a researcher. I have quite a lot of free time so I want to utlize them by self learning...

I have been studying physics and math on my own for ever a year now, and I am not sure about when I am ready to move on to something higher. How do you know when you 'get' something? Is it when you can look at all of the problems and figure out instantly how to do them just intuitively...

Are there any articles on solutions for simple self consistent systems in EM, as in when the field equations are coupled with the motion of the particles, I would like to explicitly see the energy conservation in those systems.

I am a beginner to QFT and I try to plot the Feynman diagram for the photon self-energy. Following Mandl-Shaw book (page 109 Eq. 7.22) \int d^4x_1 d^4x_2 (-1)\mathrm{Tr}(iS_F(x_2-x_1)\gamma A^-(x_1) iS_F(x_1-x_2) \gamma A^+(x_2)) but when I try to convert it to momentum space I get \int...

I'm an M.E. and I want to learn about electronics to the point where I can design and build circuits that do what I want. Right now I have only a very basic background from undergrad EE courses, I know a bit about opamps and transistors and diodes and transformers and the E&M physics theory and...

Homework Statement (see attachment) Homework Equations The Attempt at a Solution The self capacitance of an isolated sphere is ##4\pi \epsilon_o R## where R is the radius of sphere but I am not sure how to begin on this one. Any help is appreciated. Thanks!

Hello, I am using a lock-in amplifier to measure the AC voltage across a small sample of superconducting wire located in a cryostat. As the self-inductance and the capacitance of the wires used for the measurement are non-negligible, I have basically connected the lock-in amplifier in series...

I have been out of school for over a year now. The reason for this is that I was bored with the classes I was taking at the community college (calc 2, physics 2 and physics 3) to the point that I could not concentrate on earning A's, among other issues, not quite sure why given that I had...

Hello friends. It seems to me that i have reach a wall with my math education. In 3.5 months i will be doing tests for mathematics faculty(college), something like SAT but a bit more difficult i think. Anyway i have been doing more difficult problems from problem set and i simply can't figure...

After participating in so many discussions about QM and GR... I've got strange hobby. Well, the first experiment. The actress is overplaying, I know, but she is not an actress at all. https://www.youtube.com/watch?v=sHiMZQwJU9Y Girl is transforming into a vampire and then burns...

hi i am now learning the topic "Reproduction in flowering plants" and i encounter something i don't understand It is said that there are two disadvantages for self pollination 1. the offspring are genetically identical to their parents so becoming less adaptable to the environment...

I am having trouble thinking about self induction in the primary coil... My text says in standard situation the self induction voltage is same as the primary voltage... My question is how does current flow in the primary coil then? Please tell me where I am getting this wrong?

I'm going into a career that is heavily based in physics and I'd like to be able to read the original source material for the physics involved. However, calculus was many, many years ago for me. So, to understand and learn radiation physics, and eventually quantum mechanics, my understanding...

Hi, Ive been doing some reading into 1 dimensional plasma numerical simulations and they keep referring to solving for a "self-consistent" field. If the simulation is in one dimension with periodic boundary conditions, how would I go about solving this electric field? Example: dE/dx =...

can we have a system in which the machine is able to diagnosis the fault yet to come in minutes and suggest as well as assist the user to rectify it in while the machine is working. for example in an engine when the dirt sticks in jet of carburetor then a pressurized air is used to remove it or...

Homework Statement I have to solve for RD, RS1, and RS2. Homework Equations AVNL=-mg(Rd//rd) Vdd-Id(Rd+RStotal)=0 Bias Line Eq: Vg-Vgsq-Idq(RStotal) The Attempt at a Solution I have solved for RD by using the AVNL equation and the given value of -8 for AVNL. I found RD to be...

Okay, first of all I am hoping I have posted this in the correct place. So the background is the following, I currently have an engineering degree but wish to actually expand my knowledge more in the physics side of things.I just would like to know a level of physics up to undergrad standard...

Hey, I haven't been here for awhile but I would like to know if anyone has some good links or free pdf books, to help me learn and excel in quantum physics and calc. I so far have not taken any calculus and it will most likely be completely foreign to me but, I understand that and since I'm...

I can't find sth about self interaction which tells for sure in what situations we should consider it and how to manipulate it! Can we talk about self interaction for e.g. a single electric charge?Or it appears only in certain cases?How should we calculate it? Thanks

Hey all, I was reading Terence Tao's text on analysis. After stating the axioms of pairing and regularity, he asks for proof of the statement that no set can be an element of itself, using the above two axioms. He has not defined any concepts like hierarchy or ranks. I can see how, A...

Hello PF, I'm going to be heading to my 3rd year as a Physics major and I want to make this last month of summer a tad productive. So my plan was to review/self study math using the mathematical methods book by Boas (and maybe some online resources to get more depth on some particular...

I can do calculus on a normal level from high school now but I would like to further myself. I was recommended Michael Spivak 4th Edition...Tom Apostol 1st and 2nd edition...Walter Rudin Mathematical Analysis 3rd Edition...Richard Courant 1 and 2 calculus/analysis introduction.

Hi everybody, I've been out of school for 4 years and I'd like to learn some physics. I'll give a summary of my background and I'd like suggestions as to what I should study and in what order. There's an abundance of resources that can be found through Google, but it's hard to decide what is...

Hello Everyone! I have a problem I am solving through a self study project from Lowell Brown's book entitled: Quantum Field Theory". It is a math question (basically) on recursion relations. Homework Statement The variational definition gives us the relation: det[1-λK] = exp{tr...

I am a graduate student preparing for my comperhensive exam, and do not have a very strong background in QM. Which method should I use? which book takes me to the point of getting 60% out of exam. The material is advanced undergraduate QM.

Self Taught Abstract Mathematics Course?? Good evening everyone! I would like to know if anyone has any recommendations for a self-teaching course in abstract mathematics. I have attempted to teach myself abstract algebra and linear algebra but for some reason I cannot find the discipline to...

The equations used are: 1)ΣF=ma 2)fk = μkN 3)fs ≤ μsN 4)Fs = - kx Here are the questions: 1. If ΣF is 10N and a=1 m/s^2, find m using the first equation 2. Given ΣF = fk, m=250 kg, μk=0.2, and N = 10m, find a. 3. ΣF=T-10m, but a=0 m/s^2. Use the first equation to find m in terms of T...

No, you didn't read the title wrong. I am really self studying a physics class. I just finished Mechanics (Physics I) and since I want to go to college to study physics to become an engineer or physicist. I need to take the next class, E&M (Physics II, Electricity and Magnetism). However, I...

Hi, I was working through a Twistor paper and it was explaining the link between holomorphic vector bundles and anti self dual gauges and it had an equation like this, for electro-magnetism. \lambda^a \lambda^b(\frac{\partial A_{b\dot{b}}}{\partial x^{a\dot{a}}}-\frac{\partial...

Hi. I am a physics major and Id probably go with mathematical/theoretical physics path. Where do I start with self learning linear algebra? I'm good with proofs but I'm not comfortable with learning math without intuition or motivation behind the axioms. Still, I hate math without rigor...

The diaphragm in a dynamic microphone moves a wire coil in the presence of a magnet to induce a current related to the movement. Other types of microphones, like electret and condenser microphones have self noise - noise not attributable to the amplifier. I wonder if all of the "self noise"...

Hello everyone, I'm brand new here as a poster. I have been working to teach myself calculus to a solid level before taking classes in calulcus. I want to make sure I have a good foundation before I get "thrown to the wolves" so to speak. I've always been a little scared of math so I want to...

I have a qualitative question to ask: The Schwarzschild radius of matter is proportional to its mass. The actual radius of the matter, assuming it is spherical, is proportional to the cube root of its mass. This implies that the density required to form a Schwarzschild radius decreases as...

Hi all. A friend and I were discussing whether or not it was possible to construct a mechanism of weights and pulleys etc. or other methods to keep a seesaw level regardless of where the weight was placed on the platform. The end result would be the ability to step onto one side of a level...

Homework Statement For one of the problems in my homework it asks to prove that L=μAN^2/length ...i didnt have a problem with that osrt but the second part states a spring is 5cm long and has a diameter of .15 cm with 50 coils...how much self-inductance must you include for it to model as an...

Hi, I'm new to the forums. I hear this is a helpful site with knowledgeable people who know what they're talking about. I was wondering if you could answer a couple of questions for me. I am in high-school and soon attending college in a year, I plan on going into Medicine but I want to be...

In Feynman lectures vol 2, chap 28, it is given that for an electron at rest, the net self force exerted on itself is zero(due to repulsions etc.). But when accelerated, owing to the retardation of the electromagnetic fields, there would be a net self force. A series expansion(with unknown...

I was wondering to what extent we understand the self interference of particles in the double slit experiment. More specifically, I have heard that a single particle, acting as a wave can pass through both slits at once and that is what causes the interference. This explanation seems a bit fishy...

Hi everyone, I am trying to figure out how to correctly calculate the self capacitance of a multi layer coil. I have been trying to find an online calculator or software which can do this but I don't really know where to look. Just hoping someone here can give me some insight. Any help...

I graduated with a BA in Classicals and didn't take any math in college. Now that I've been out for a few years I find that I have an overwhelming desire to learn how things work in a way I can describe mathematically (it's hard to explain, hopefully you understand) and am starting some self...

According to wikipedia: "In physics, self-organized criticality (SOC) is a property of (classes of) dynamical systems which have a critical point as an attractor. Their macroscopic behaviour thus displays the spatial and/or temporal scale-invariance characteristic of the critical point of a...

Since there no teacher doing geometry or topology in our school,I have to learn some course all by myself.But I often come upon problems when I'm reading the book or doing the exercises.In some exercises,I even don't know which part of book can be used to solve it. So I want to ask here hope...

Alright so far I took calc1-3 which included vector calc and I'm currently taking LA. The LA class is only a quarter long and afterward I'm taking DE and Complex variables. I'm wondering what math should I take next year. I'm thinking either taking Analysis or Abstract Algebra. What do you think...

This is not a perpetual motion machine; the fusion power plant will run out of nuclear power to provide electricity to power it; and this type of transit drive works in theory by having two combustion chambers positioned parallel to the spacecraft 's width and perpendicular to its length. Each...

Hi, I was reading some text and came across this problem, the problem is also mentioned in this link from Wiki: http://en.wikipedia.org/wiki/Inductance#Self-inductance They said that it is because the 1/R now becomes infinite, this is what I'm confused about. From my understand, there would be...

I want to start selfstudying such subjects. I don't know where to start. I don't know any calculus or precalculus. I've taken a basic algebra and geometry class that went a tiny bit into trig. I have taken a basic physics class in 10th grade. I'm 16 years old in 11th grade as an exchange...

Homework Statement We must build a self contained device which can pass through a standard doorway. It will start .5 metres from the egg cup with an egg in it this egg cup is then .5 metres from a cart that the egg has to pass through and continue going to a target on the other side of the...