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Mungan, Carl E. – European Journal of Physics, 2012
Resistance to motion often includes a dry frictional term independent of the speed of an object and a fluid drag term varying linearly with speed in the viscous limit. (At higher speeds, quadratic drag can also occur.) Here, measurements are performed for an aluminium disc mounted on bearings that is given an initial twist and allowed to spin…
Descriptors: Mechanics (Physics), Motion, Science Instruction, Scientific Principles
Eckert, Bodo; Grober, Sebastian; Vetter, Martin; Jodl, Hans-Jorg – European Journal of Physics, 2012
The Millikan oil-drop experiment, to determine the elementary electrical charge e and the quantization of charge Q = n [middle dot] e, is an essential experiment in physics teaching but it is hardly performed in class for several reasons. Therefore, we offer this experiment as a remotely controlled laboratory (RCL). We describe the interactivity…
Descriptors: Science Instruction, Science Experiments, Energy, Scientific Principles
Ruckle, L. J.; Belloni, M.; Robinett, R. W. – European Journal of Physics, 2012
The biharmonic oscillator and the asymmetric linear well are two confining power-law-type potentials for which complete bound-state solutions are possible in both classical and quantum mechanics. We examine these problems in detail, beginning with studies of their trajectories in position and momentum space, evaluation of the classical probability…
Descriptors: Probability, Quantum Mechanics, Science Instruction, Physics
Lisovskiy, V. A.; Koval, V. A.; Artushenko, E. P.; Yegorenkov, V. D. – European Journal of Physics, 2012
In this paper we suggest a simple technique for validating the Goldstein-Wehner law for a stratified positive column of dc glow discharge while studying the properties of gas discharges in an undergraduate laboratory. To accomplish this a simple device with a pre-vacuum mechanical pump, dc source and gas pressure gauge is required. Experiments may…
Descriptors: Physics, Photography, Science Instruction, Science Laboratories
Demonstration Experiments for Solid-State Physics Using a Table-Top Mechanical Stirling Refrigerator
Osorio, M. R.; Morales, A. Palacio; Rodrigo, J. G.; Suderow, H.; Vieira, S. – European Journal of Physics, 2012
Liquid-free cryogenic devices are acquiring importance in basic science and engineering. But they can also lead to improvements in teaching low temperature and solid-state physics to graduate students and specialists. Most of the devices are relatively expensive, but small-sized equipment is slowly becoming available. Here, we have designed…
Descriptors: Climate, Physics, Observation, Graduate Students
Kraftmakher, Yaakov – European Journal of Physics, 2012
Nearly two centuries ago, Fourier discovered that any periodic function of period T can be presented as a sum of sine waveforms of frequencies equal to an integer times the fundamental frequency [omega] = 2[pi]/T (Fourier's series). It is impossible to overestimate the importance of Fourier's discovery, and all physics or engineering students…
Descriptors: Undergraduate Study, Science Laboratories, Science Activities, Engineering Education
Beke, Tamas – European Journal of Physics, 2012
Thermoacoustic instability is defined as the excitation of acoustic modes in chambers with heat sources due to the coupling between acoustic perturbations and unsteady heat addition. The major objective of this paper is to achieve accurate theoretical results in a thermoacoustic heat transfer process. We carry out a detailed heat transfer analysis…
Descriptors: Information Technology, Acoustics, Heat, Thermodynamics
Abellan-Garcia, Francisco J.; Garcia-Gamuz, Jose Antonio; Valerdi-Perez, Ramon P.; Ibanez-Mengual, Jose A. – European Journal of Physics, 2012
The aim of this paper is to determine the acceleration due to gravity "g", using a simple and low-cost experimental device. The time taken for a metallic ball to travel a predetermined distance is measured and recorded by a series of optical sensors. Four pairs of sensors are placed along the external surface of a vertical methacrylate tube at…
Descriptors: Physics, Science Instruction, Scientific Principles, Science Experiments
Babovic, V. M.; Mekic, S. – European Journal of Physics, 2011
In the year 1851 in Paris, the apparent change of the plane of oscillation of a linear pendulum was observed by Leon Foucault. In the same year, at the same place, the unequal duration of the oscillations of a right- and left-handed conical pendulum was observed by Bravais. Today, the Foucault pendula are common at universities, the Bravais…
Descriptors: Mechanics (Physics), Science Experiments, Scientific Principles, College Science
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
Johannessen, Kim – European Journal of Physics, 2010
An analytic approximation of the solution to the differential equation describing the oscillations of a simple pendulum at large angles and with initial velocity is discussed. In the derivation, a sinusoidal approximation has been applied, and an analytic formula for the large-angle period of the simple pendulum is obtained, which also includes…
Descriptors: Physics, Motion, Science Instruction, Equations (Mathematics)
Kraftmakher, Yaakov – European Journal of Physics, 2010
A differential magnetic circuit (magnetic bridge) is described. The circuit separates the magnetic field sensor and the sample under study. A Hall probe serves as the sensor. The signal from the sensor can be enhanced by concentrating the magnetic flux. The magnetic bridge works even with dc magnetic fields. The device is used for displaying…
Descriptors: Physics, Science Laboratories, Energy, Science Instruction
Greczylo, Tomasz; Mazur, Piotr; Debowska, Ewa; Wieczorek, Piotr – European Journal of Physics, 2010
This paper presents an experiment in which students determine the mass sensitivity of three crystal quartz resonators, designed to be carried out in "Physics Laboratory II" at the Institute of Experimental Physics, University of Wroclaw. The authors discuss the process of setting up the experiment and the results of the measurements.…
Descriptors: Physics, Science Laboratories, Science Instruction, College Science
Zorba, Serkan; Farah, Constantine; Pant, Ravi – European Journal of Physics, 2010
An advanced undergraduate laboratory experiment is outlined which uses a dye laser to map out the chromatic dispersion curve of a polymethyl methacrylate (PMMA) optical fibre. Seven different wavelengths across the visible spectrum are employed using five different dyes. The light pulse is split into two pulses, one to a nearby photodetector and…
Descriptors: Lasers, Laboratory Experiments, Science Instruction, College Science
Donoso, G.; Ladera, C. L.; Martin, P. – European Journal of Physics, 2010
A system of two magnets hung from two vertical springs and oscillating in the hollows of a pair of coils connected in series is a new, interesting and useful example of coupled oscillators. The electromagnetically coupled oscillations of these oscillators are experimentally and theoretically studied. Its coupling is electromagnetic instead of…
Descriptors: Magnets, Physics, Science Instruction, Energy