Classical Definition and 1000 Threads

Hi everyone , can you find some books for classical physics for begginers pls ? thnx

I just thought of this. I think I know the answer to it now, but it took me a little bit of thinking. Maybe someone who teaches high school physics might find it useful. - - - - - I have a battery-powered toy car. I turn it on and it accelerates from speed 0 to speed 1. (I'm leaving...

Homework Statement Suppose a block sliding on a slippery horizontal surface experiences a drag force F=-cv3/2 where c is a positive constant. At time t=0, the block is at position x=0 with initial positive velocity. Find the velocity and position as a function of time. Derive an expression for...

Hello, this might be a trivial question for many of you. I would like to know what are the simplest phenomena/experiments, if any, (and perhaps the first historically) that contradict the assumption that subatomic particles like electrons, protons, neutrons..., can be thought of as "small...

Homework Statement Electrical breakdown (e.g, lightning) is caused by an avalanche process. If a free electron gains enough energy between collisions to ionize the neutral molecules when they collide with them, then those two electrons will gain enough energy between collisions to ionize the...

After taking an intersession music appreciation course, I have a new interest in music from the classical era. Mozart's Symphony #40 in G minor is the best sound I've ever heard - period. Anyone have any recommendations for other things I should check out? I hear it's great to have in the...

The Stefan-Boltzmann law is as follows: The energy radiated by a black body radiater per second per unit area is directly proportional to the fourth power of the absolute temperature. Equation: I = σT^4 Is it possible to explain this law by means of classical physics only? If so...

I just transferred to Georgia Tech from Georgia State and I'm registering for classes. I ave taken Intro Phys 1 and 2, and intro to modern physics. I have math up to DE. I will be taking Classical Mechanics this semester, and am wondering if it is a good idea to take QM before completing the...

Homework Statement Figure is attached. In an amusement park ride called the hammer a large beam rotates in a ver- tical plane about a central pivot (see figure). Cages are attached to the end of the beam; these rotate independently. The riders are strapped to the walls of the cages. The...

Hello. I read this assertion in a book: if we take at an initial time t_0 a constant density distribution \rho(p,q,t_0) in phase space, then this implies that \rho wil remain independent of time for all t>t_0 because by Liouville's theorem \frac{\partial\rho}{\partial...

My Physics teacher yesterday said something that gave me pause. He was talking about the necessity of clearly understanding the first-order principles of the science we study. Last semester I took Classical Mechanics (part 1 of the Introduction to Calculus-Based Physics at my college) with a...

What is the relationship between the quantum mechanical path integral and classical mechanics path integral?

A cord is wrapped around the inner drum of a wheel and pulled horizontally with a force of 200N. The wheel has a mass of 50 kg and a radius of gyration of 0.07 m. Let ms = 0.20 and mk = 0.15. (a) Determine the friction force, F at the wheel ground contact point assuming that the wheel rolls...

Homework Statement A ball is sitting on a frictionless seesaw with no inclination at the beginning, and a constant angular velocity \phi. Find the position of the ball as a function of timeHomework Equations L=T-V, T=(m\dot{}x2+m\dot{}y2)/2, V=mgyThe Attempt at a Solution The first problem I...

Hi, I'm doing this Classical Dynamics section II question which can be found here (http://www.maths.cam.ac.uk/undergrad/pastpapers/2008/Part_2/list_II.pdf ) on page 27. I have done most of the question but am unsure about the last part. Specifically using Hamilton's equations to show there's...

Hey guys, I've been fighting this problem all weekend with little avail. I only know a little Java, but we have this final project in MatLab, a program I don't really know.Homework Statement I need to compute the orbit of a comet using the Runge-Kutte, Euler and midpoint methods. The program...

Dirac's Lectures on Quantum Mechanics begins with a big chapter on classical mechanics called "The Hamilton Method". Within the first ten pages he says, "Now in the usual dynamical theory, one makes the assumption that the momenta are independent functions of the velocities, but that...

Could you please address the following? (1) For a conservative system, total energy (E = KE + PE) is a constant. It does not depend on time. Is it because of this time-independent nature that E is a constant of motion? (2) For a conservative system, the PE is a function of position...

Hello, I'm looking to get a book on classical field theory at a beginner level, so please don't recommend anything that a first year grad student wouldn't understand! Anyways I was look into getting Landau and Lifgarbagez's book any other suggestions? I don't really have any idea of which...

I have been trying to remember if in classical EM it is equivalent to describe magnetization through bound electric currents A. \vec{j_b} = \nabla \times \vec M \vec{k_b} = \vec M \times \vec{\hat{n}} OR bound magnetic charges B. \rho_b = -\nabla \cdot \vec M \sigma_b = \vec M \cdot...

So the following questions were posed in an another thread by Pallen, and I thought i'd give an attempt at answering them, since they tend to show up over and over again. " 1) It is not clear that GR and QFT must be considered in conflict that must be resolved somehow. I've seen a growing...

Homework Statement How fast must a body be traveling if its forrect relativistic momentum is 1% greater than the classical momentum Homework Equations P_r = mv/sqrt(1-(v^2/c^2)) P_nr = mv p_r = 1.01P_nr The Attempt at a Solution mv/sqrt(1-(v^2/c^2)) = 1.01mv mv =...

I'm looking for a classical mechanics book that is heavily mathematical based, I've looked around a little however I'm lazy and don't want to buy a dud book. any recommendations would be great, thanks. (also i know there's 100000000000threads on text recom's however can't seem to find much ppl...

Homework Statement Show that the free energy of classical particles with no internal magnetic moment is always independent of magnetic field. Hint: Write down Z for N classical particles. Let the particles interact by U which depends only on the positions of the interacting particles. Show...

Which one would you recommend for me? Topics I'd like to have covered (most important ones): -Euler-Lagrange's equations -Lagrange's and Hamilton's approach to mechanics -Noether's theorem -KAM theorem -Bertrand's theorem -Poisson's brackets Plenty of examples and exercises would be...

I am having a difficult time understanding the reasoning behind torque. From a textbook I read, However, why is it that it's easier to rotate a door when you are farther from the rotational axis? You are still moving the same amount of mass. Of course, I know that torque = r x F and thus...

Homework Statement particle of mass m1 collides with particle m2 at rest. The out come of the reaction were m3 and m4 which leave the collision at angles 3 and angle 4 withthe original path. find the energy of the reaction Q in terms of the masses and angles and p1 Homework Equations...

Tha classical ground state is Ne\'{e}l state: every spin up is surrounded by nearest neighbours which are down, and vice versa. To give them a name, denote the spins down the A sublattice, and the spins up the B sublattice. Perform a canonical transformation on the B (but not on the A spins...

Hey, can somebody show me how to derive that the lagrangian in classical phyics is L=T-V i have seen this formula so many times, but i have no idea where it really comes from?

Hey all, just wondering if there is some consensus on which topics, covered in Jackson's Classical Electrodynamics (3rd ed), are the most relative to advanced studies in physics - e.g., quantum mechanics, the various field theories, relativity, symmetry and so on... I'm not looking to skip...

hi, how do you calculate the classical radius of nucleons or quarks? do you include only the electrostatic potential energy or also some nuclear potential energy?. i have read many times that the classical radius of nucleons is lower than the classical radius of the electron, is it right...

Hi all, Does anyone know a decent set of notes/book dealing with issues re: quantum fluctuations around a (fixed) classical background? In particular say, scalar QED with a fixed background E&M field. Thanks, Dan

Homework Statement Let a particle slides in a straight smooth tube passing obliquely through the Earth. Assuming no friction and no rotational effects. Describe the motion. Find Frequency and Period. Homework Equations F = -GMm/r^2 The Attempt at a Solution Don't know how to...

Hi, I'm working through Section 4-3 of Itzykzon and Zuber's QFT textbook, but I am a bit stuck while trying to understand some of the quantities and equations. First of all, what is this "one-body scattering operator \mathcal{F}(A)"? It is defined (eqn 4-89, page 188) as \mathcal{F}(A) =...

Homework Statement At t0 = 0 a particle of mass m is released from rest at x0 = b > 0 away from a fixed origin of force that attracts the particle according to the law: F=-k/x^3 where k >0 is a constant. At what time the particle will reach the force center x =0? Homework Equations I...

Homework Statement Repelling force F=kx. What is the motion equation Homework Equations F=ma The Attempt at a Solution what I did so far, I found the equation of motion which is equal to x= sqrt(2E/K)Sin(wt+b), I am not sure about my answer. For the second part it is kind of tricky...

Hi all, It's my first time to ask a question here I am now taking a Thermodynamics course and I have the authority to choose what topics to study in this course. My intention is to be able to study statistical mechanics afterward. So I need thermodynamics that will be useful when studying...

I'm working my way (slowly) through Landau & Lif***z Classical Mechanics. I'm finally nearing the end of chapter one, and although I hit another stumbling block, I think I've got it now. If anyone has the time to check my reasoning, I'd be grateful. I will quote the passage that was confusing...

Hi, i have just started studying quantum computing. i found it very interesting and i was wondering to dedicate my thesis on it...BUT...i suffer a lack of knowledge about classical computing devices (i'm not talking about the classic works on logic by Turing and Church and so forth)...so..can...

Hello folks, I would like to know more about the standard books in Classical Field Theory which I am not really familiar with. I would be grateful if you suggest something (be it a book/lecture notes etc...) in line with the 2nd chapter of the following lecture notes...

Hello. Anyone knows online places where I can find classical papers of physics? Stuff by Einstein, Lorentz, Rutherford, Bohr, etc ... Any of these are welcome. Thanks.

Let M be a manifold and let f: m -> R a Morse function. Let x be a critical point of f and assume all critical points are non-degenerate. Let W^u(x) be th unstable manifold of x when considering the negative gradient flow on M. Why does the tangent space at x to W^u(x) = Eig^- H^2f(x)...

So this was a textbook problem my professor did in lecture. I felt like I followed along with the logic as she went along, but after a few days and looking back it, I can't seem to recreate it genuinely. Homework Statement A ball is thrown with initial speed v0 up an inclined plane. The...

I understand how the formulas for classical electron radius are derived.. but what significance does the classical radius really carry? Obviously it's not really the size of the electron. So what does it mean?? Thank you for any help... Sorry, I'm new to this stuff.

Do I need Classical mechanics and waves in order to understand Quantum mechanics? In order to learn quantum mechanics , do I need to know Classical mechanics and Waves or only linear algebra and calculus?

Homework Statement It is well known that the speed of sound in air is u = 330m/s at STP. What this means is that sound travels at speed u in all directions in the frame S where the air is at rest. In any other frame S', moving relative to S, its speed it not u in all directions. To verify this...

What is the course "Classical Mechanics"? What is this course? Just a little harder version of calculus intro. to physics I? It's on the schedule as a sophmore course, and I have heard of a graduate course with the title too. What do you learn in it? I don't want to be retaught the very basics...

The vacuum polarization result in QED seems to always be written in a "QED form". I would be interested in seeing it in an old-fashioned classical physics form. Without vacuum polarization the electric potential in a region containing a point charge is of course Q/r. So if the vacuum...

Homework Statement This is a problem from Merzbacher. Assuming a particle to be in one of the stationary states of an infinitely high one-dimensional box, calculate the uncertainties in position and momentum, and show that they agree with the Heisenberg uncertainty relation. Also show that...

Ok so I have this circular merry go round and its rotating with a constant angular velocity \omega . There is a point A on the merry go round moving radially outward with a constant velocity V. Let the center of the circular merry go round be O. I want to find the acceleration of point A with...