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Direct linkEven, C.; Bouquet, F.; Remond, J.; Deloche, B. – European Journal of Physics, 2009
As an experimental project proposed to students in fourth year of university, a viscometer was developed, consisting of a small magnet levitating in a viscous fluid. The viscous force acting on the magnet is directly measured: viscosities in the range 10-10[superscript 6] mPa s are obtained. This experiment is used as an introduction to complex…
Descriptors: Physics, Measurement Techniques, Magnets, Science Experiments
Bresler, Marc R.; Hagen, John P. – Journal of Chemical Education, 2008
Many physical chemistry lab courses include an experiment in which students measure surface tension as a function of surfactant concentration. In the traditional experiment, the data are fit to the Gibbs isotherm to determine the molar area for the surfactant, and the critical micelle concentration is used to calculate the Gibbs energy of micelle…
Descriptors: Chemistry, Science Instruction, Science Laboratories, Science Experiments
Kelly, Resa M.; Jones, Loretta L. – Journal of Chemical Education, 2008
Animations of the particulate level of matter are widely available for use in chemistry classes and are often the primary means of representing molecular behavior. These animations may also be viewed by individual students using textbook Web sites, although without reinforcement or feedback. It is not known to what extent the material in these…
Descriptors: Chemistry, Animation, Science Instruction, Teaching Methods
Katz, Civia A.; Calzola, Zachary J.; Mbindyo, Jeremiah K. N. – Journal of Chemical Education, 2008
A microscale laboratory experiment to investigate the formation and utility of microemulsions is described. Microemulsions are technologically important fluids that can reduce the use of toxic organic solvents. In the experiment, students prepare a microemulsion and compare the solubility of sudan III dye in the microemulsion and in dodecane. They…
Descriptors: Chemistry, Laboratory Experiments, Science Instruction, College Science
