Is the electrostatic force between a point charge
... that a positively charged point charge induces negative charges on the part of the sphere that is closest to it and positive charges on the part that is further away. It is natural to wonder if this phenomenon is more general and if the force is attractive for any geometry, not just a sphere. This q ...
... that a positively charged point charge induces negative charges on the part of the sphere that is closest to it and positive charges on the part that is further away. It is natural to wonder if this phenomenon is more general and if the force is attractive for any geometry, not just a sphere. This q ...
Coherent Decay of Bose-Einstein Condensates
... As the coldest form of matter known to exist, atomic Bose-Einstein condensates are unique forms of matter where the constituent atoms lose their individual identities, becoming absorbed into the cloud as a whole. Effectively, these gases become a single macroscopic object that inherits its propertie ...
... As the coldest form of matter known to exist, atomic Bose-Einstein condensates are unique forms of matter where the constituent atoms lose their individual identities, becoming absorbed into the cloud as a whole. Effectively, these gases become a single macroscopic object that inherits its propertie ...
A CP - Indico
... antineutron (Cork et al., LBNL) (large energy release 1965: antideuteron (Zichichi, CERN and Lederman,from BNL)antineutron destruction) 1995: antihydrogen atom (CERN, by now millions produced !) Every particle has an antiparticle Some particles (e.g., the photon) are their own antiparticles ! ...
... antineutron (Cork et al., LBNL) (large energy release 1965: antideuteron (Zichichi, CERN and Lederman,from BNL)antineutron destruction) 1995: antihydrogen atom (CERN, by now millions produced !) Every particle has an antiparticle Some particles (e.g., the photon) are their own antiparticles ! ...
Phase transition in gauge theories, monopoles and the Multiple
... renormalization group equations for the SM, the effective potential in the two–loop approximation is investigated, and the existence of its postulated second minimum at the fundamental scale is confirmed. Phase transitions in the lattice gauge theories are reviewed. The lattice results for critical ...
... renormalization group equations for the SM, the effective potential in the two–loop approximation is investigated, and the existence of its postulated second minimum at the fundamental scale is confirmed. Phase transitions in the lattice gauge theories are reviewed. The lattice results for critical ...
circular motion
... A train is moving towards North. At one place it turns towards North-East. Here we observe that (A) the radius of curvature of outer rail will be greater than that of the inner rail (B) the radius of curvature of one of the rails will be greater (C) the radius of curvature of inner rail will be grea ...
... A train is moving towards North. At one place it turns towards North-East. Here we observe that (A) the radius of curvature of outer rail will be greater than that of the inner rail (B) the radius of curvature of one of the rails will be greater (C) the radius of curvature of inner rail will be grea ...
無投影片標題
... In dealing with large numbers of particles, we are interested only in the statistical behavior of the whole group rather than in the behavior of each individual particle. There are three distribution laws determining the distribution of particles among available energy states. Maxwell-Boltzman ...
... In dealing with large numbers of particles, we are interested only in the statistical behavior of the whole group rather than in the behavior of each individual particle. There are three distribution laws determining the distribution of particles among available energy states. Maxwell-Boltzman ...
PS - USTC, ICTS
... • Only the first term of the axial vector current operator, which is the Pauli spin, has been calculated in the non-relativistic quark models. • The second term, the relativistic correction, has not been included in the non-relativistic quark model calculations. The relativistic quark model does inc ...
... • Only the first term of the axial vector current operator, which is the Pauli spin, has been calculated in the non-relativistic quark models. • The second term, the relativistic correction, has not been included in the non-relativistic quark model calculations. The relativistic quark model does inc ...
Lecture 5
... PHY 2049: Physics II What have we learned Coulomb’s law, electric field, Gauss’ theorem and electric potential. Energy ...
... PHY 2049: Physics II What have we learned Coulomb’s law, electric field, Gauss’ theorem and electric potential. Energy ...
Spin Hall Effect
... identically cancelled by scattering (even weak scattering). This unique feature of this model can be traced back to the specific spin dynamics relating the rate of change of the spin and the spin current directly induced, forcing such a spin current to vanish in a steady non-equilibrium situation. • ...
... identically cancelled by scattering (even weak scattering). This unique feature of this model can be traced back to the specific spin dynamics relating the rate of change of the spin and the spin current directly induced, forcing such a spin current to vanish in a steady non-equilibrium situation. • ...
Chapter 9 Linear Momentum and Collisions
... Newton’s laws. We were able to solve problems involving these situations by applying a conservation principle—conservation of energy. Consider another situation—a 60-kg archer stands on frictionless ice and fires a 0.50-kg arrow horizontally at 50 m/s. From Newton’s third law, we know that the force ...
... Newton’s laws. We were able to solve problems involving these situations by applying a conservation principle—conservation of energy. Consider another situation—a 60-kg archer stands on frictionless ice and fires a 0.50-kg arrow horizontally at 50 m/s. From Newton’s third law, we know that the force ...
One Antimatter — Two Possible Thermodynamics
... running in different directions might still be possible, due to the (potential) existence of antimatter. Since Feynman’s theory of the positron [4], antiparticles are seen as particles moving backward in time. This gives us a hint that conventional thermodynamics, which is formulated for our world f ...
... running in different directions might still be possible, due to the (potential) existence of antimatter. Since Feynman’s theory of the positron [4], antiparticles are seen as particles moving backward in time. This gives us a hint that conventional thermodynamics, which is formulated for our world f ...
4thlectureslideposting
... between the charges and is attractive if the charges have opposite sign and repulsive if they have the same sign. Forces on a point charge due to other point charges can be added vectorially to get the total force. The electric field arising from a collection of point charges is the force on a test ...
... between the charges and is attractive if the charges have opposite sign and repulsive if they have the same sign. Forces on a point charge due to other point charges can be added vectorially to get the total force. The electric field arising from a collection of point charges is the force on a test ...
The Electric Field
... Not only can electric charge exist on an object, but it can also move through an object. Substances that readily conduct electric charge are called electrical conductors. Materials that conduct electric charge poorly are called electrical insulators. ...
... Not only can electric charge exist on an object, but it can also move through an object. Substances that readily conduct electric charge are called electrical conductors. Materials that conduct electric charge poorly are called electrical insulators. ...
Elementary particle
In particle physics, an elementary particle or fundamental particle is a particle whose substructure is unknown, thus it is unknown whether it is composed of other particles. Known elementary particles include the fundamental fermions (quarks, leptons, antiquarks, and antileptons), which generally are ""matter particles"" and ""antimatter particles"", as well as the fundamental bosons (gauge bosons and Higgs boson), which generally are ""force particles"" that mediate interactions among fermions. A particle containing two or more elementary particles is a composite particle.Everyday matter is composed of atoms, once presumed to be matter's elementary particles—atom meaning ""indivisible"" in Greek—although the atom's existence remained controversial until about 1910, as some leading physicists regarded molecules as mathematical illusions, and matter as ultimately composed of energy. Soon, subatomic constituents of the atom were identified. As the 1930s opened, the electron and the proton had been observed, along with the photon, the particle of electromagnetic radiation. At that time, the recent advent of quantum mechanics was radically altering the conception of particles, as a single particle could seemingly span a field as would a wave, a paradox still eluding satisfactory explanation.Via quantum theory, protons and neutrons were found to contain quarks—up quarks and down quarks—now considered elementary particles. And within a molecule, the electron's three degrees of freedom (charge, spin, orbital) can separate via wavefunction into three quasiparticles (holon, spinon, orbiton). Yet a free electron—which, not orbiting an atomic nucleus, lacks orbital motion—appears unsplittable and remains regarded as an elementary particle.Around 1980, an elementary particle's status as indeed elementary—an ultimate constituent of substance—was mostly discarded for a more practical outlook, embodied in particle physics' Standard Model, science's most experimentally successful theory. Many elaborations upon and theories beyond the Standard Model, including the extremely popular supersymmetry, double the number of elementary particles by hypothesizing that each known particle associates with a ""shadow"" partner far more massive, although all such superpartners remain undiscovered. Meanwhile, an elementary boson mediating gravitation—the graviton—remains hypothetical.