AS Unit 1 –January 2010 –Solutions and feedback
... State, with a reason, what interaction is responsible for this decay. The weak interaction (1 mark). This can be deduced because strangeness is not conserved or there is a change/decay of quark (flavour) (1 mark) (ii) State two properties, other than energy and momentum, that are conserved in this d ...
... State, with a reason, what interaction is responsible for this decay. The weak interaction (1 mark). This can be deduced because strangeness is not conserved or there is a change/decay of quark (flavour) (1 mark) (ii) State two properties, other than energy and momentum, that are conserved in this d ...
On the role of electromagnetic phenomena in some atmospheric
... on large-scale atmospheric vortices is discussed. Although, actually, the conventional simple comparison of forces in physics can help in elucidating the character of processes on a linear section only. The problem can be reformulated in another manner. Hydrodynamic equations tacitly include the imp ...
... on large-scale atmospheric vortices is discussed. Although, actually, the conventional simple comparison of forces in physics can help in elucidating the character of processes on a linear section only. The problem can be reformulated in another manner. Hydrodynamic equations tacitly include the imp ...
Störmer
... having a charge smaller than the charge of any individual electron. This is not the way things are supposed to be. A collection of objects may assemble to form a bigger object, or the parts may remain their size, but they don’t create anything smaller. If the new particles were doubly charged, it wo ...
... having a charge smaller than the charge of any individual electron. This is not the way things are supposed to be. A collection of objects may assemble to form a bigger object, or the parts may remain their size, but they don’t create anything smaller. If the new particles were doubly charged, it wo ...
Nucleus and Radioactivity
... charge and mass were determined by Millikan and J.J.Thomson. It was also known that all atoms other then those of hydrogen had more than one electron. Thomson suggested that the atom was a sphere of positive charge and mass uniformly distributed with electrons embedded in it like plums in a plum pud ...
... charge and mass were determined by Millikan and J.J.Thomson. It was also known that all atoms other then those of hydrogen had more than one electron. Thomson suggested that the atom was a sphere of positive charge and mass uniformly distributed with electrons embedded in it like plums in a plum pud ...
Linear Collider - University of Victoria
... symmetry breaking and physics beyond the Standard Model that cannot be answered without a physics program at a Linear Collider overlapping that of the Large Hadron Collider. We therefore strongly recommend the expeditious construction of a Linear Collider as the next major international High Energy ...
... symmetry breaking and physics beyond the Standard Model that cannot be answered without a physics program at a Linear Collider overlapping that of the Large Hadron Collider. We therefore strongly recommend the expeditious construction of a Linear Collider as the next major international High Energy ...
Compaction of granular materials composed of deformable particles
... contacts. In this regime, the particle shapes are well approximated by polygons, and Z then represents the number of sides of these polygons. Figure 3 shows the mean coordination number Z and the packing fraction Φ as a function of cumulative vertical strain ε defined from the beginning of the simula ...
... contacts. In this regime, the particle shapes are well approximated by polygons, and Z then represents the number of sides of these polygons. Figure 3 shows the mean coordination number Z and the packing fraction Φ as a function of cumulative vertical strain ε defined from the beginning of the simula ...
A new Definition of Graviton (PDF Available)
... In the quantum mechanics of any general field, plane waves of specific spin can always be written in terms of photons with a simple spin state and a general spatial wave function. Thus the fundamental entity, the photon, can be considered quite generally to be a plane wave with a circularly polarize ...
... In the quantum mechanics of any general field, plane waves of specific spin can always be written in terms of photons with a simple spin state and a general spatial wave function. Thus the fundamental entity, the photon, can be considered quite generally to be a plane wave with a circularly polarize ...
Solved Problems in Special Relativity - UBC PHAS
... • Comment of the limiting values of v and x as t → ∞. Solution When a particle of charge q moves in an electric field E, the force F on the particle is F = qE. If the particle moves in the direction of E, then F and v are parallel. Accordingly, Eq. (42) holds with ã = qE/m. It follows from Eq. (42) ...
... • Comment of the limiting values of v and x as t → ∞. Solution When a particle of charge q moves in an electric field E, the force F on the particle is F = qE. If the particle moves in the direction of E, then F and v are parallel. Accordingly, Eq. (42) holds with ã = qE/m. It follows from Eq. (42) ...
1 - vnhsteachers
... In an elastic collision, objects bounce off each other. In a perfectly elastic collision, objects bounce off each other without friction. Both momentum and kinetic energy are conserved: m1v1 + m2v2 = m1v1’ + m2v2’ INELASTIC COLLISIONS Because of friction, the observed final momentum does not equal t ...
... In an elastic collision, objects bounce off each other. In a perfectly elastic collision, objects bounce off each other without friction. Both momentum and kinetic energy are conserved: m1v1 + m2v2 = m1v1’ + m2v2’ INELASTIC COLLISIONS Because of friction, the observed final momentum does not equal t ...
Neutral Weak Interactions
... Z 0 → νν is allowed Each ν species contributes to the total width ΓZ Since σ ∝ ΓZ the cross section will depend on the number of (light) neutrino generations ...
... Z 0 → νν is allowed Each ν species contributes to the total width ΓZ Since σ ∝ ΓZ the cross section will depend on the number of (light) neutrino generations ...
4.2 The Structure of an Atom
... Properties of Subatomic Particles Neutrons In 1932, the English physicist James Chadwick carried out an experiment to show that neutrons exist. Chadwick concluded that the particles he produced were neutral because a charged object did not deflect their paths. A neutron is a neutral subatomic partic ...
... Properties of Subatomic Particles Neutrons In 1932, the English physicist James Chadwick carried out an experiment to show that neutrons exist. Chadwick concluded that the particles he produced were neutral because a charged object did not deflect their paths. A neutron is a neutral subatomic partic ...
Motion of charged particles through magnetic and electric fields
... of the fields can be adjusted so that a particle can move without any deflection when ...
... of the fields can be adjusted so that a particle can move without any deflection when ...
Finite difference method
... of the fields can be adjusted so that a particle can move without any deflection when ...
... of the fields can be adjusted so that a particle can move without any deflection when ...
ppt - EPFL
... Standard Model (SM): best description of known elementary particles and their interactions: ...
... Standard Model (SM): best description of known elementary particles and their interactions: ...
Momentum Problems Set1(12) Solutions
... 4. Suppose a ping-pong ball and a bowling ball are rolling toward you. Both have the same momentum, and you exert the same force to stop each. How do the time intervals to stop them compare? a) It takes less time to stop the ping-pong ball. b) Both take the same time. c) It takes more time to stop t ...
... 4. Suppose a ping-pong ball and a bowling ball are rolling toward you. Both have the same momentum, and you exert the same force to stop each. How do the time intervals to stop them compare? a) It takes less time to stop the ping-pong ball. b) Both take the same time. c) It takes more time to stop t ...
Lepton
A lepton is an elementary, half-integer spin (spin 1⁄2) particle that does not undergo strong interactions, but is subject to the Pauli exclusion principle. The best known of all leptons is the electron, which is directly tied to all chemical properties. Two main classes of leptons exist: charged leptons (also known as the electron-like leptons), and neutral leptons (better known as neutrinos). Charged leptons can combine with other particles to form various composite particles such as atoms and positronium, while neutrinos rarely interact with anything, and are consequently rarely observed.There are six types of leptons, known as flavours, forming three generations. The first generation is the electronic leptons, comprising the electron (e−) and electron neutrino (νe); the second is the muonic leptons, comprising the muon (μ−) and muon neutrino (νμ); and the third is the tauonic leptons, comprising the tau (τ−) and the tau neutrino (ντ). Electrons have the least mass of all the charged leptons. The heavier muons and taus will rapidly change into electrons through a process of particle decay: the transformation from a higher mass state to a lower mass state. Thus electrons are stable and the most common charged lepton in the universe, whereas muons and taus can only be produced in high energy collisions (such as those involving cosmic rays and those carried out in particle accelerators).Leptons have various intrinsic properties, including electric charge, spin, and mass. Unlike quarks however, leptons are not subject to the strong interaction, but they are subject to the other three fundamental interactions: gravitation, electromagnetism (excluding neutrinos, which are electrically neutral), and the weak interaction. For every lepton flavor there is a corresponding type of antiparticle, known as antilepton, that differs from the lepton only in that some of its properties have equal magnitude but opposite sign. However, according to certain theories, neutrinos may be their own antiparticle, but it is not currently known whether this is the case or not.The first charged lepton, the electron, was theorized in the mid-19th century by several scientists and was discovered in 1897 by J. J. Thomson. The next lepton to be observed was the muon, discovered by Carl D. Anderson in 1936, which was classified as a meson at the time. After investigation, it was realized that the muon did not have the expected properties of a meson, but rather behaved like an electron, only with higher mass. It took until 1947 for the concept of ""leptons"" as a family of particle to be proposed. The first neutrino, the electron neutrino, was proposed by Wolfgang Pauli in 1930 to explain certain characteristics of beta decay. It was first observed in the Cowan–Reines neutrino experiment conducted by Clyde Cowan and Frederick Reines in 1956. The muon neutrino was discovered in 1962 by Leon M. Lederman, Melvin Schwartz and Jack Steinberger, and the tau discovered between 1974 and 1977 by Martin Lewis Perl and his colleagues from the Stanford Linear Accelerator Center and Lawrence Berkeley National Laboratory. The tau neutrino remained elusive until July 2000, when the DONUT collaboration from Fermilab announced its discovery.Leptons are an important part of the Standard Model. Electrons are one of the components of atoms, alongside protons and neutrons. Exotic atoms with muons and taus instead of electrons can also be synthesized, as well as lepton–antilepton particles such as positronium.