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Lee, Jung Sook; Chae, Min; Kim, Jung Bog – Physics Teacher, 2010
A recent article by Morse described interesting electrostatics experiments using an MBL charge sensor. In this application, the charge sensor has a large capacitance compared to the charged test object, so nearly all charges can be transferred to the sensor capacitor from the capacitor to be measured. However, the typical capacitance of commercial…
Descriptors: Energy, Scientific Concepts, Evaluation Methods, Science Instruction
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Velasco, S.; White, J. A.; Roman, F. L. – Physics Teacher, 2010
The effect of density inversion on the convective flow of water in a spherical glass flask cooled with the help of an ice-water bath is shown. The experiment was carried out by temperature measurements (cooling curves) taken at three different heights along the vertical diameter of the flask. Flows inside the flask are visualized by seeding the…
Descriptors: Scientific Concepts, Evaluation Methods, Visual Stimuli, Hands on Science