Introduction Definition and 856 Threads

Homework Statement This exercice is in a Chapter named Introduction to Cartesian tensors. The following is the original question of the exercise: Homework Equations Compute the vector: (x1^2 + 2x1*x2^2 + 3x2^2*x3), i The Attempt at a Solution Plz help me, i don't understand what...

I know a fair amount of theoretical Quantum Physics, how things work within it, and the ideas that ground it. I lack, though, the more advanced mathematics. Right now I'm taking an Engineering course, and last year I studied a little bit of Quantum Physics, but the calculations were limited...

Hi. I am an undergraduate physics student and have just begun lectures on elementary particles and the Standard Model. At the moment I really know nothing about this branch of physics and am looking for recommendations on a textbook which introduces the subject well. Thanks

Hello I am looking to introduction of nuclear reactor physics course in the summer 2012 can u help me to find this course in any universities ?

Question from Jim on Yahoo Answers: The things you should know are: 1. The sum of normal random variables is a normal random variable with mean equal to the sum of the means and variance equal to the sum of the variances. 2. Multiplying a normal RV by a constant gives a normal RV with mean...

Homework Statement Give a sample problem its solution employing Pigeonhole Principle Homework Equations Pigeonhole Principle The Attempt at a Solution We have this homework about pigeonhole principle which hasn't been discussed yet, but we need to present an example and present it...

Here are a few: http://codecogs.com/latex/eqneditor.php (WYSIWYG) http://tobi.oetiker.ch/lshort/lshort.pdf (PDF) ftp://ftp.ams.org/ams/doc/amsmath/short-math-guide.pdf (FTP)

Homework Statement Find nonzero scalars a, b, c, such that au+b(u-v)+c(u+v)=0 for every pair of vectors u and v This isn't a homework question, more of a conceptual exercise, but I want to understand it thoroughly.The Attempt at a Solution I've gone to u(a+b+c) + v(c-b)=0 then I couldn't quite...

Should I buy this book for a good price now even though I won't be taking a junior year E@M class till two years from now. I'm asking because I could use Griffiths now as a good reference book. But because it's paper back idk if it will last for two more years. This semester I'm taking an E@M...

Just learning about vectors in 3 dimensions. Would it be correct to think of the cross product vector like a resultant vector? Is it similar to the displacement? If so, why is it always 90 degrees from both original vectors? If anyone has some deeper insight into any of these vector topics...

I'd like to introduce myself and ask a pedagogical question regarding my future studies. My name is Rob Dorsey and I am a 64 year old, disabled and retired airline pilot living in a southern suburb of Cincinnati. I have a degree in music with an engineering minor from a small regional university...

Hello i studied Sadri Hassani az mathematical physics book. if i want to learn topology (( for general relativity )) what it the best book for introduction ?

Hi, Could you pls advise me any textbooks or papers where I can find pedagogical introduction to N=2 Supersymmetry & familiarize myself... Thank you very much Best Regards

I'm looking for a good introductory text on electromagnetism for someone who has very little experience with physics but is comfortable with multivariate and vector calculus and ODE's. I'd prefer something that starts from the basics and works up in a rigorous fashion. Note that I am proficient...

Hello, I have recently been looking into purchasing this book. I know it’s only ten dollars, but money is money, and if some of you pleasant people have any experience with this book I’d appreciate any feedback (of the book). Thank you and have a Merry X-mas. :-p

Homework Statement Let the dipole \vec{m} = m\hat{k} be at the origin, and call a certain horizontal axis the y axis. a) On the z axis, what is the angle between the z axis and the magnetic field? b) On the y axis, what is the angle between the z axis and the magnetic field? c) On the cone...

Hey all, was wondering if someone knows of a book (if it's on safari books online, even better!), website or other source that teaches me -- a software guy -- the basics of electronics. Basically I want to know about voltages, generators, capacitors and everything in-between. Wanna have my...

Any recommendations?

hey! are there any good books or online lectures for an intro to Cog science? Is this a good one?: https://www.amazon.com/dp/0262691752/?tag=pfamazon01-20 I'm not interested in popularizations, first year academic material would be great Thanks!

1. Given: Let f: X → Y be a function. Then we have an associated function f-1: P(Y) → P(X), where f-1 (B)⊂X is the inverse image of B⊂Y. Question: Show that f^(-1) is one-to-one if and only if f is onto. [Notes: ⊂ represents subspace, I just couldn’t find a way to put the line under the...

Homework Statement My intro to Proofs class uses How to Prove It, 2nd edition by Velleman. I would like a couple other references on introduction to proofs. What do you recommend? I don't mind spending hours agonizing over proofs, but I'd like to be able to check my work with answers...

I'm just learning work in my physics class and, for some reason, I'm having difficulty understanding it. The problem in my homework assignment asks: A particle moves 5 m in the positive x direction while being acted upon by a constant force F = <4,2,-4>.The work done on the particle by this...

I'm going through the book: Principles of Quantum Mechanics 2nd edition by R. Shankar 1. In the mathematical introduction to projection operators (page 22), it writes: "Consider the expansion of an arbitrary ket |V\rangle in a basis: |V\rangle=\sum_{i}^{} |i\rangle\langle i|V\rangle"...

Hello World I can't introduce the concepts of hydrodynamics into my mind,such as the streamline. I can't imagine what is a streamline? What makes us say that the flow is turblant or the flow is steady? --------- "the direction of the tangent drawn at any point on the streamline represents...

I'm looking for a pedagogic introduction to d-wave superconductivity on the level of field theory. Ideally, this would involve a derivation of d-wave superconductivity and the form of the gap parameter from some fundamental Hamiltonian (if such a derivation is even possible yet). Books and...

Homework Statement I'm asked to design a small engineering component/part/machine of your choice.I need an idea of what to design or a starting point Homework Equations The Attempt at a Solution

Hello What is the better book on introduction of optics? if you have on online please give me the link regards

I am looking for books or papers that explain conceptual ideas that underlie the study of quantum fields. I am looking for something that clearly explains Field measurement. Most textbooks i am aware of emphasize on the development of formal techniques of Quantum field theory.

Homework Statement One model for the spread of rumor is that the rate of spread is proportional to the product of the fraction y of the population who have heard the rumor and the fraction who have not heard the rumor. i) Write a differential equation that is satisfied by y ii) Solve the...

Calculate d<p>/dt Answer: d<p>/dt = <-dV/dx> generally speaking (I believe) you need to use scrodinger's equation (both of dphi/dt and dphi*/dt) and the expectation value of momentum: <p> = -i*h_bar * integral (phi* * dphi/dx) dx. I would say that the way I used Cramster was just short of...

I am taking a class on Manifolds and whilst reading the book I came about some terminology that has got me confused. What is the differences/relations between these terms? Euclidian Space Topological Space Metric Space Vector Space I thought that a vector space was based on the...

Hi, I have been searching the internet for some gentle introductions of Fibonacci chain, but so far I haven't found anything. I wonder if anyone can recommend some good introductions to me, e.g. a book, an article... Thank you.

Hi, sorry in advance if this isn't the right section but I'm not too sure where else to post this Homework Statement The essay requires me to type up an introduction that has a word count of roughly 700-1000 words. I have chosen to do an experiment on parabolic trajectory and thus have to...

Hi I have a project that involves the use of Healpix. I am familiar with IDL, so I would like to use HEALpix through IDL routines. My problem is that I cannot find a starting point. I have data from both Galex and IRAS. I got the IRAS data from http://lambda.gsfc.nasa.gov (Lambda...

I own a copy of Griffith's Quantum Mechanics and I like how it is written very much but while skimming through Griffith's Particle book I saw a reference that said "at the level of Park" and I decided to investigate. I started to read through it and the text is structured the way most books...

Is it better to start learning Python using a introduction to python book (Think Python) or a scientific programming book (e.g. A Primer on Scientific Programming with Python, 2009)? I have little to no programming experience. I'd use python solely for physics computation/simulations. I was...

Homework Statement Suppose that a beam of light consists of photons having an energy of 5.4 eV. what is the wavelength of the light? Homework Equations hc = 1240 eV*nm E = \frac{hc}{\lambda} The Attempt at a Solution 5.4eV = \frac{1240eV*nm}{\lambda} \lambda =...

Homework Statement Find the length of the smallest standing wave that can be formed with light having a frequency of 600THZ. Homework Equations f = 600*10^{12}Hz c = 2.998x10^{8}\frac{m}{s} \lambda f=c The Attempt at a Solution \lambda f=c \lambda...

Homework Statement Suppose that an electron has a kinetic energy of 1.0 eV. What are the speed and the momentum of the electron? The book is Modern Physics for Scientists and Engineers by Morrison. If anyone knows where to get any of the answers(or solutions. solutions may be harder to...

Has anyone read How to Prove It: A Structured Approach by Daniel Velleman or Introduction to Mathematical Thinking: Algebra and Number Systems by Gilbert and Vanstone? If so, how well do they prepare a student who has had no exposure to proofs to take classes such as abstract algebra? Thanks...

Hello everyone. I don't know if this is the right place for this thread, but I am looking for an introductory neuroscience text for beginners. Thanks.

I need to give a presentation on the basics concepts of the Neurotransmitters. Now, a lot of stuff is available on the net and I can easily get it all from there. But I am thinking about doing something different, I am thinking about to introduce the neurotransmitter from a different...

Our last course on Mathematical Physics covers topology, topological spaces, metric spaces; differential forms; introduction to group theory including finite and continuous groups, group representations, and Lie groups. The textbook to be used is Math methods by Arfken and Intro to Hilbert...

I was wondering if anyone could give me any links or an introduction to abstract algebra. I know that abstract algebra is a tough concept to understand (at least for some people, but it varies from person to person). If anyone could help with the basics of it would be greatly appreciated.

Sorry to start yet another thread on the basics of magnetism, but I'm missing something... Glancing through an introductory college physics textbook, the three chapters on magnetism are missing something ...and it is the one thing that every normal person thinks of when they here the word...

Homework Statement Suppose we have a spin 1/2 Particle in a prepared state: \left|\Psi\right\rangle = \alpha \left|\uparrow\right\rangle + \beta\left|\downarrow\right\rangle where \left|\uparrow\right\rangle \left|\downarrow\right\rangle are orthonormal staes representing spin up and...

Good evening, everyone. My name is Steve, I'm 37 and from a small town called Fort Dodge in Iowa (USA). I have no formal education in Astronomy, but have always loved the topic since I was a child (most likely due to having a cousin who was an engineer for NASA who would send me photos and...

I am doing a physics course, and I while reading the textbooks, it seems the writers assume that I am already introduced to energy transformation equations. I have never done them previously as I have skipped some courses to get to the one I am in. It seems that thsi is a very basic concept...

Hi folks, I'm taking a class in statistical mechanics out of Sethna's text. Part of the course involves student presentations. I've settled on his chapter on order parameters, broken symmetry and topology. Its a relatively short chapter and I'd like to read some more. I'm looking for...

I'm having a course about introduction to quantum mechanics and I am having a lot of problems understanding the derivation of the Rayleigh-Jeans Law which was an attempt to explain the black body radiantion expectrum with classical arguments. My main problem is: they assumed that matter was...