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Did you mean grading AND physics?
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Aguilar, Horacio Munguía; Maldonado, Rigoberto Franco; Navarro, Luis Barba – Physics Education, 2018
In hydrostatics, pressure measurement with U-gauges and their relationship to density is a well-known experiment. Very little is studied or experimented with the dynamics of the movement of a liquid in a U-tube probably due to its theoretical complexity but, after all, it is a simple damped oscillating system. In this paper we present a relatively…
Descriptors: Science Instruction, Physics, Science Experiments, Laboratory Experiments
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Helseth, L. E. – European Journal of Physics, 2011
We propose a simple and fascinating experiment for studying diffusion in gels using a pH-sensitive dye. By doping agar with methyl red, we obtain a gel which rapidly reacts to changes in pH by changing its absorption spectrum. The pH gradients can be followed using a digital camera, and we demonstrate here that the pH-sensitive colour changes can…
Descriptors: Photography, Chemistry, Experiments, Visual Stimuli
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Ribeiro, Isabel A. C.; Faustino, Ce´lia M. C.; Guedes, Rita C.; Alfaia, Anto´nio J. I.; Ribeiro, Maria H. L. – Journal of Chemical Education, 2015
The transport of molecules across biological membranes are critical for most cellular processes. Membrane permeability is also a key determinant for drug absorption, distribution, and elimination. Diffusion, that is, the migration of matter down a concentration gradient, is a simple mechanism by which both endogenous and drug molecules can enter…
Descriptors: Chemistry, Physics, Science Experiments, Health Sciences
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Wang, Liang-Bi; Zhang, Qiang; Li, Xiao-Xia – European Journal of Physics, 2009
This paper aims to contribute to a better understanding of convective heat transfer. For this purpose, the reason why thermal diffusivity should be placed before the Laplacian operator of the heat flux, and the role of the velocity gradient in convective heat transfer are analysed. The background to these analyses is that, when the energy…
Descriptors: Energy Conservation, Energy, Physics, Science Instruction
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de Izarra, Charles; de Izarra, Gregoire – European Journal of Physics, 2011
This paper deals with the study of a toy CD hovercraft used in the fluid mechanics course for undergraduate students to illustrate the lubrication theory described by the Stokes equation. An experimental characterization of the toy hovercraft (measurements of the air flow value, of the pressure in the balloon and of the thickness of the air film…
Descriptors: Undergraduate Students, Mechanics (Physics), Toys, College Science
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Bringuier, E. – European Journal of Physics, 2009
The paper analyses particle diffusion from a thermodynamic standpoint. The main goal of the paper is to highlight the conceptual connection between particle diffusion, which belongs to non-equilibrium statistical physics, and mechanics, which deals with particle motion, at the level of third-year university courses. We start out from the fact…
Descriptors: Thermodynamics, Mechanics (Physics), Scientific Concepts, Science Instruction
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Lima, F. M. S. – European Journal of Physics, 2012
A mathematical derivation of the force exerted by an "inhomogeneous" (i.e. compressible) fluid on the surface of an "arbitrarily shaped" body immersed in it is not found in the literature, which may be attributed to our trust in Archimedes' law of buoyancy. However, this law, also known as Archimedes' principle (AP), does not yield the force…
Descriptors: Physics, Mechanics (Physics), Science Instruction, Equations (Mathematics)
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School Science Review, 1982
Discusses dice model of exponential radionuclide decay; glancing and collinear perfectly elastic collisions; digital capacitance meter; use of top pan balance in physics; microcomputer calculation of gradient of straight line (includes complete Commodore PET computer program); Fresnel lenses; low-voltage radiant heater; Wheatssone's bridge used as…
Descriptors: College Science, Computer Programs, Higher Education, Laboratory Procedures
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Marin, E.; Lara-Bernal, A.; Calderon, A.; Delgado-Vasallo, O. – European Journal of Physics, 2011
Some peculiarities of the heat transfer through a sample that is heated by the superficial absorption of light energy under continuous uniform illumination are discussed. We explain, using a different approach to that presented in a recent article published in this journal (Salazar "et al" 2010 "Eur. J. Phys." 31 1053-9), that the front surface of…
Descriptors: Heat, Science Instruction, Thermodynamics, Light
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Moore, Duncan T.; Ryan, Danette P. – Physics Teacher, 1977
Discusses developments in the field of gradient index optical lenses for resolving problems of lens spherical abberration. (SL)
Descriptors: College Science, Light, Optics, Physical Sciences
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Binous, Housam – Chemical Engineering Education, 2007
We study four non-Newtonian fluid mechanics problems using Mathematica[R]. Constitutive equations describing the behavior of power-law, Bingham and Carreau models are recalled. The velocity profile is obtained for the horizontal flow of power-law fluids in pipes and annuli. For the vertical laminar film flow of a Bingham fluid we determine the…
Descriptors: Undergraduate Study, Mechanics (Physics), Motion, Profiles
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Vermillion, Robert E. – American Journal of Physics, 1975
Describes an undergraduate experiment. Discusses a model for the behavior of bubbles under differing viscosities and pressure gradients and conditions for failure of the model. (GH)
Descriptors: College Science, Higher Education, Instructional Materials, Laboratory Experiments
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Kolm, Henry H. – Physics Teacher, 1975
Describes the process of high gradient magnetic separation which gives promise as a method of large scale removal of colloidal impurities including bacteria and viruses. Examples and diagrams are included. (GH)
Descriptors: College Science, Magnets, Physics, Public Health
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Morton, N. – Physics Education, 1984
Describes the nature of gradient refractive index (GRIN) lenses, focusing on refraction in these materials, focal length of a thin Wood lens, and on manufacturing of such lenses. Indicates that GRIN lenses of small cross section are in limited production with applications suggested for optical communication and photocopying fields. (JN)
Descriptors: College Science, High Schools, Higher Education, Industry
Lindstrom, Peter A.; And Others – 1980
This document consists of four units. The first of these views calculus applications to work, area, and distance problems. It is designed to help students gain experience in: 1) computing limits of Riemann sums; 2) computing definite integrals; and 3) solving elementary area, distance, and work problems by integration. The second module views…
Descriptors: Answer Keys, Calculus, College Mathematics, College Science
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