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Showing 16 to 30 of 64 results Save | Export
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Hnizdo, V. – European Journal of Physics, 2012
In nonrelativistic quantum mechanics, the total (i.e. orbital plus spin) angular momentum of a charged particle with spin that moves in a Coulomb plus spin-orbit-coupling potential is conserved. In a classical nonrelativistic treatment of this problem, in which the Lagrange equations determine the orbital motion and the Thomas equation yields the…
Descriptors: Quantum Mechanics, Motion, Physics, Science Instruction
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Clark, D.; Franklin, J.; Mann, N. – European Journal of Physics, 2012
We consider two different forms for a relativistic version of a linear restoring force. The pair comes from taking Hooke's law to be the force appearing on the right-hand side of the relativistic expressions: d"p"/d"t" or d"p"/d["tau"]. Either formulation recovers Hooke's law in the non-relativistic limit. In addition to these two forces, we…
Descriptors: Physics, Science Instruction, Scientific Principles, Energy
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Thamburaj, P. K. – Journal of Chemical Education, 2007
Analogies from life experiences help students understand various relationships presented in an introductory chemistry course. Coulomb's law is a complex relationship encountered in introductory general chemistry. A proper understanding of the relationships between the quantities involved in Coulomb's law is necessary in order for students to…
Descriptors: Chemistry, Introductory Courses, Undergraduate Students, Undergraduate Study
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Gsponer, Andre – European Journal of Physics, 2009
The objective of this introduction to Colombeau algebras of generalized functions (in which distributions can be freely multiplied) is to explain in elementary terms the essential concepts necessary for their application to basic nonlinear problems in classical physics. Examples are given in hydrodynamics and electrodynamics. The problem of the…
Descriptors: Physics, Computation, Scientific Concepts, Science Instruction
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Harbola, Varun – European Journal of Physics, 2011
In this paper, we accurately estimate the ground-state energy and the atomic radius of the helium atom and a helium-like Hookean atom by employing the uncertainty principle in conjunction with the variational approach. We show that with the use of the uncertainty principle, electrons are found to be spread over a radial region, giving an electron…
Descriptors: Science Instruction, Molecular Structure, Science Laboratories, Computation
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Tavares, J. M. – European Journal of Physics, 2009
The dynamics of braking of wheeled vehicles is studied using the Coulomb approximation for the friction between road and wheels. The dependence of the stopping distance on the mass of the vehicle, on the number of its wheels and on the intensity of the braking torque is established. It is shown that there are two regimes of braking, with and…
Descriptors: Motor Vehicles, Safety Equipment, Physics, Statistical Analysis
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Besson, Ugo – Science & Education, 2013
This paper presents a history of research and theories on sliding friction between solids. This history is divided into four phases: from Leonardo da Vinci to Coulomb and the establishment of classical laws of friction; the theories of lubrication and the Tomlinson's theory of friction (1850-1930); the theories of wear, the Bowden and Tabor's…
Descriptors: Science Instruction, Science History, Theories, Scientific Concepts
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Rascle, Olivier; Traclet, Alan; Souchon, Nicolas; Coulomb-Cabagno, Genevieve; Petrucci, Carrie – Research Quarterly for Exercise and Sport, 2010
The purpose of this study was to investigate the aggressor-victim difference in perceived legitimacy of aggression in soccer as a function of score information (tied, favorable, unfavorable), sporting penalization (no risk, yellow card, red card), and type of aggression (instrumental, hostile). French male soccer players (N = 133) read written…
Descriptors: Team Sports, Victims of Crime, Aggression, Scores
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Banerjee, Shubho; Andring, Kevin; Campbell, Desmond; Janeski, John; Keedy, Daniel; Quinn, Sean; Hoffmeister, Brent – Physics Teacher, 2008
The similar mathematical forms of Coulomb's law and Newton's law of gravitation suggest that two uniformly charged spheres should be able to orbit each other just as two uniform spheres of mass are known to do. In this paper we describe an experiment that we performed to demonstrate such an orbit. This is the first published account of a…
Descriptors: Energy, Physics, Motion, Science Instruction
Li, Jing – ProQuest LLC, 2012
Electricity and magnetism are important topics in physics. Research shows that students have many common difficulties in understanding concepts related to electricity and magnetism. However, research to improve students' understanding of electricity and magnetism is limited compared to introductory mechanics. This thesis explores issues…
Descriptors: Energy, Magnets, Physics, Scientific Concepts
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Arthur, Richard T. W. – Science & Education, 2012
In this paper it is argued that virtual processes are dispensable fictions. The argument proceeds by a comparison with the phenomenon of quantum tunnelling. Building on an analysis of Levy-Leblond and Balibar, it is argued that, although the phenomenon known as quantum tunnelling certainly occurs and is at the basis of many paradigmatic quantum…
Descriptors: Cognitive Processes, Comparative Analysis, Data Analysis, Models
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Traclet, Alan; Rascle, Olivier; Souchon, Nicolas; Coulomb-Cabagno, Genevieve; Petrucci, Carrie; Ohbuchi, Ken-Ichi – Research Quarterly for Exercise and Sport, 2009
Most researchers have defined aggression in sport as overt acts violating the formal rules and intentionally causing harm. Such conduct in team sports may also be conceptualized as a kind of social interaction, which would suggest aggression is not judged as an isolated act but as a set of actions and reactions between individuals. In many…
Descriptors: Team Sports, Aggression, Athletes, Males
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Gratton, Luigi M.; Defrancesco, Silvia – Physics Education, 2006
We present a simple computer-aided experiment for investigating Coulomb's law of sliding friction in a classroom. It provides a way of testing the possible dependence of the friction coefficient on various parameters, such as types of materials, normal force, apparent area of contact and sliding velocity.
Descriptors: Computer Assisted Instruction, Physics, Science Experiments, Secondary School Science
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Gsponer, Andre – European Journal of Physics, 2007
A general and rigorous method to deal with singularities at the origin of a polar coordinate system is presented. Its power derives from a clear distinction between the radial distance and the radial coordinate variable, which makes that all delta functions and their derivatives are automatically generated, and ensures that the Gauss theorem is…
Descriptors: Energy, Magnets, Mechanics (Physics), Science Instruction
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Piccioni, R. G. – Physics Teacher, 2007
Too often, students in introductory courses are left with the impression that Einstein's special theory of relativity comes into play only when the relative speed of two objects is an appreciable fraction of the speed of light ("c"). In fact, relativistic length contraction, along with Coulomb's law, accounts quantitatively for the force on a…
Descriptors: Physics, Magnets, Scientific Principles, Science Instruction
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