1. A

    Electric Field for the circular path of positively charged particle

    Here is picture. Answers is A. My attempt was that I thought if i were to place a positive test charge then it would go from top to bottom if there was a positive charge in the center it was avoiding and a positively charged particle at the top, but an...
  2. S

    Charged Particle

    According to classical theory Why does an accelerated charged paticle radiates energy?? Sent from my ASUS_Z010D using Tapatalk
  3. S

    Modeling Aluminum particle vaporization

    Hello All, I am trying to model the combustion of Aluminum particles in air. The first step is to vaporize the particles according to the equation Δc=(3Φ_s*ρ_s/τ)*(1+0.276*sqrt(Re)), which describes the inter-phase mass transfer rate. Something that I am trying to understand is, whether the...
  4. S

    crystalite size , grain size,particle size

    What is the difference between crystallite size, grain size, and particle size?
  5. H

    X4 Quantization of Particle State

    Edit: Yet another X4 post. This topic has been retired. -Dan
  6. M

    Physics Software computational particle physics

    Hi to all, I have a random number generator in FORTRAN, which gives a random numbers to my particles initial velocity in three dimension (vx,vy,vz). If, I want to make my particles to embark to move with a specific weight (eg. Maxwellian), what should I do? absv = sqrt(vx*vx+vy*vy+vz*vz)...
  7. L

    Particle Physics

    How do subatomic particles propagate through the bubble chamber? How are protons formed?
  8. T

    Mechanics II: Hamiltonian and Lagrangian of a relativistic free particle

    The Problem: I am given the Hamiltonian of the relativistic free particle. H(q,p)=sqrt(p^2c^2+m^2c^4) Assume c=1 1: Find Ham-1 and Ham-2 for m=0 2: Show L(q,q(dot))=-m*sqrt(1-(q(dot))^2/c^2) 3: Consider m=0, what does it mean? Equations Used: Ham-1: q(dot)=dH/dp Ham-2: p(dot)=-dH/dq...
  9. C

    Question about particle decay

    Hi all I'm new to this forum and have hit an impass with my current research. Currently, I'm trying to work out possible decays for cooper paired neutrinos being struck by a high energy photon. I'm unsure of how to go about solving this. Any help or ideas would be greatly appreciated.
  10. B

    Uncertainty Relation for generic spin-1/2 particle

    I'm using the Quantum Systems, Processes, and Information textbook for my quantum mechanics course and working on problem 4.4 below I feel like there is a shortcut to this answer that I'm missing, because I've done several pages of algebra and simplifications and I can't seem to get a form...
  11. A

    Particle accleration under gravity waves?

    I have been through following papers for research: 1) 2) Conclusion of the second paper given above...
  12. L

    Free particle hits potential step. Wavelength of particle and amplitude of wave?

    A free particle with energy E hits a potential step with $U_0 > 0$ at $x \geq 0$. Assume that $E > U_0$. (1) Determine the wavelengths associated with the particle in the area $x > 0$ and in the area $x < 0$. (2) What is the relationship between the amplitude of the transmitted wave in the...
  13. C

    postion vs time graph for moving charged particle?

    Question {Consider the system shown to the right. Particles 1 and 2 are fixed in place while particle three is placed at the location shown and released. Let’s look at the mechanics of q3, which has a mass of 3.00 X 10-5 kg. What will be the net force on q3? What will be q3’s acceleration...
  14. N

    Does the particle behave according to the math of quantum mechanics prior to downconv

    watch free movies online, latest action movies, unsteady lyrics An entangled pair behave deterministically in terms of classical mechanics and Bell's Inequality applies to the pair. Does the mathematics of classical or quantum mechanics apply to the original particle that is downconverted into...
  15. R

    Kinematics of a particle

    A swimmer jumps using a spring board. The board bends with distance −X0. Then it accelerates him with ac = −(ω^2)x with ω = const. He loses contact at x = 0, then he flies vertically upward with af = −g. Air resistance negligible. Actually, I want to ask a simple question. I've already got v(s)...
  16. C

    Showing lim of v is c when constant F accelerates particle

    Problem from textbook reads: "A particle with mass m accelerated from rest by a constant force F will, according to Newtonian mechanics, continue to accelerate without bound. That is, as t goes to infinity, v goes to infinity. Show that, according to relativistic mechanics, the particle's speed...
  17. M

    force and potential energy

    Hello, I'm new to this forum and was wondering if somebody/anybody could help me with this question, If a particle of mass 1kg is acted on by a net conservative force given by F = -2x+x^2+2x^3, where F is newton's and x is in meters.(a) Obtain an expression for the potential energy of the...
  18. N

    Particle executing simple harmonic motion

    This refers to question 14. in the scan I attached. A particle executes simple harmonic motion with amplitude of 3.0 cm. At what displacement from the midpoint of its motion does its speed equal one half of its maximum speed? The answer to the problem is 2.6 cm. I don't know how to obtain this...
  19. R

    Particle in a cubic box with momentum operator

    A particle moving in 3D is confined to a cubic box of edge length L with one corner at the origin and edges lined up with the positive coordinate axes. Using separation of variables, solve the momentum eigenvalue equation P ⃗_ϕ (r ⃗ )=p ⃗_ϕ (r ⃗ ) (see attachment for better representation of...
  20. R

    Particle in an infinite square well

    A particle moving on the x axis is confined to a one-dimensional box of edge length L with one end at the origin and the other at x=L. The confining potential seen by the particle vanishes inside the box, and is infinite outside the box; the appropriate boundary condition is that ϕ(x) vanish at...