NotesFAQContact Us
Collection
Advanced
Search Tips
Showing 1 to 15 of 22 results Save | Export
Peer reviewed Peer reviewed
Direct linkDirect link
Deeney, F. A.; O'Leary, J. P. – European Journal of Physics, 2012
For helium and helium-like ions, we have examined the differences between the values of the ionization energies as calculated from the Bohr theory and those measured in experiments. We find that these differences vary linearly with the atomic number of the system. Using this result, we show how the Bohr model for single-electron systems may be…
Descriptors: Nuclear Physics, Models, Scientific Principles, Quantum Mechanics
Peer reviewed Peer reviewed
Direct linkDirect link
de Izarra, Charles – European Journal of Physics, 2012
With a pedagogical goal, this paper deals with a study of the duration of an elastic collision of an inflatable spherical ball on a planar surface suitable for undergraduate studies. First, the force generated by the deformed spherical ball is obtained under assumptions that are discussed. The study of the motion of the spherical ball colliding…
Descriptors: College Science, Science Instruction, Motion, Mechanics (Physics)
Peer reviewed Peer reviewed
Direct linkDirect link
Ehrmann, Andrea; Blachowicz, Tomasz – European Journal of Physics, 2011
The question whether to walk slowly or to run when it starts raining in order to stay as dry as possible has been considered for many years--and with different results, depending on the assumptions made and the mathematical descriptions for the situation. Because of the practical meaning for real life and the inconsistent results depending on the…
Descriptors: Undergraduate Students, Problem Solving, Models, College Science
Peer reviewed Peer reviewed
Direct linkDirect link
Della Volpe, C.; Siboni, S. – European Journal of Physics, 2011
The familiar Young contact angle measurement of a liquid at equilibrium on a solid is a fundamental aspect of capillary phenomena. But in the real world it is not so easy to observe it. This is due to the roughness and/or heterogeneity of real surfaces, which typically are not perfectly planar and chemically homogeneous. What can be easily…
Descriptors: Mechanics (Physics), Equations (Mathematics), Science Instruction, Scientific Principles
Peer reviewed Peer reviewed
Direct linkDirect link
Smith, Glenn S. – European Journal of Physics, 2011
Thought experiments involving a light clock are common in introductory treatments of special relativity, because they provide a simple way of demonstrating the non-intuitive phenomenon of time dilation. The properties of the ray or pulse of light that is continuously reflected between the parallel mirrors of the clock are often stated vaguely and…
Descriptors: Scientific Concepts, Energy, Magnets, Physics
Peer reviewed Peer reviewed
Direct linkDirect link
Nguyen, Phuc H.; Matzner, Richard A. – European Journal of Physics, 2012
We study the greenhouse effect on a model satellite consisting of a tungsten sphere surrounded by a thin spherical, concentric glass shell, with a small gap between the sphere and the shell. The system sits in vacuum and is heated by sunlight incident along the "z"-axis. This development is a generalization of the simple treatment of the…
Descriptors: Climate, Horticulture, Science Instruction, College Science
Peer reviewed Peer reviewed
Direct linkDirect link
Smith, Glenn S. – European Journal of Physics, 2010
The time-average power radiated by a pair of infinitesimal dipoles is examined as their spacing is varied. The results elucidate the effect of the interaction of the dipoles on their radiation. (Contains 4 figures.)
Descriptors: Radiation, Magnets, Physics, Scientific Principles
Peer reviewed Peer reviewed
Direct linkDirect link
Schlichting, H. Joachim; Suhr, Wilfried – European Journal of Physics, 2010
We present a physically interesting toy, which is easily constructed and operated--the so-called buzzer. In spite of its simplicity, its physical analysis turns out to be rather complex. Thus, it comes as no surprise that most of its users are not familiar with the underlying physical mechanism. In this paper we propose a physical model which…
Descriptors: Toys, Science Activities, Science Instruction, Physics
Peer reviewed Peer reviewed
Direct linkDirect link
Fernandez, Francisco M. – European Journal of Physics, 2010
We present a simple one-dimensional quantum-mechanical model for a particle attached to a surface. It leads to the Schrodinger equation for a harmonic oscillator bounded on one side that we solve in terms of Weber functions and discuss the behaviour of the eigenvalues and eigenfunctions. We derive the virial theorem and other exact relationships…
Descriptors: Quantum Mechanics, Mechanics (Physics), Science Instruction, Models
Peer reviewed Peer reviewed
Direct linkDirect link
Robinett, R. W. – European Journal of Physics, 2010
We examine the Stark effect (the second-order shifts in the energy spectrum due to an external constant force) for two one-dimensional model quantum mechanical systems described by linear potentials, the so-called quantum bouncer (defined by V(z) = Fz for z greater than 0 and V(z) = [infinity] for z less than 0) and the symmetric linear potential…
Descriptors: Computation, Energy, College Science, Equations (Mathematics)
Peer reviewed Peer reviewed
Direct linkDirect link
Gron, Oyvind – European Journal of Physics, 2010
Two important questions concerning cosmic rays are: Why are electrons in the cosmic rays less efficiently accelerated than nuclei? How are particles accelerated to great energies in ultra-high energy cosmic rays? In order to answer these questions we construct a simple model of the acceleration of a charged particle in the cosmic ray. It is not…
Descriptors: Kinetics, Physics, Scientific Concepts, Science Instruction
Peer reviewed Peer reviewed
Direct linkDirect link
Boykin, Timothy B.; Luisier, Mathieu; Klimeck, Gerhard – European Journal of Physics, 2010
Discrete approaches have long been used in numerical modelling of physical systems in both research and teaching. Discrete versions of the Schrodinger equation employing either one or several basis functions per mesh point are often used by senior undergraduates and beginning graduate students in computational physics projects. In studying…
Descriptors: Graduate Students, Physics, Probability, Teaching Methods
Peer reviewed Peer reviewed
Direct linkDirect link
Tan, A.; Lyatskaya, I. – European Journal of Physics, 2009
The interesting papers by Margaritondo (2005 "Eur. J. Phys." 26 401) and by Helene and Yamashita (2006 "Eur. J. Phys." 27 855) analysed the great Indian Ocean tsunami of 2004 using a simple one-dimensional canal wave model, which was appropriate for undergraduate students in physics and related fields of discipline. In this paper, two additional,…
Descriptors: Undergraduate Study, Models, Physics, Natural Disasters
Peer reviewed Peer reviewed
Direct linkDirect link
Jakoby, Bernhard – European Journal of Physics, 2009
The collision model is frequently introduced to describe electronic conductivity in solids. Depending on the chosen approach, the introduction of the collision time can lead to erroneous results for the average velocity of the electrons, which enters the expression for the electrical conductivity. In other textbooks, correct results are obtained…
Descriptors: Graduate Students, Textbooks, Physics, Motion
Peer reviewed Peer reviewed
Direct linkDirect link
Donoso, G.; Ladera, C. L.; Martin, P. – European Journal of Physics, 2009
Theoretical models and experimental results are presented for the retarded fall of a strong magnet inside a vertical conductive non-magnetic tube. Predictions and experimental results are in good agreement modelling the magnet as a simple magnetic dipole. The effect of varying the pipe wall thickness on the retarding magnetic drag is studied for…
Descriptors: Models, Physics, Motion, Science Instruction
Previous Page | Next Page ยป
Pages: 1  |  2