Al Tobias (wat4y) - Office: Gibson S123 & Physics 218, (434) 924-0538
Demonstrations are cataloged according to PIRA Bibliography
PLEASE REQUEST DEMOS WELL IN ADVANCE
Due to Physics Building renovations, the lead time to set up demo requests has increased due to the need to transport equipment across campus. Please be kind and let me know well ahead of time what you need.
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You have selected the following Demos:
Energy Conversion and Conservation
Purpose:To demonstrate energy convertability and conservation using piezoelectric effect and solar cell.
Procedure:Pump the level arm of piezoelectric crystal set up with short, rapid strokes to produce the spark between the ball point ends.
Shine light on solar cell which converts electrical and then mechanical energy. Similar with the solar battery powered car.
Blow compressed air on the wind turbine to produce light.
Turn the friction conversion apparatus on. The apparatus shows the friction force torque, counts number of turns and measures the increase of the temperature which allows for quantitative estimate of the conversion of mechanical into thermal energy.
Hints:Use a bright flood light but do not bring it too close to the solar cells, for it will melt the plastic casing of the cells.