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Al Tobias (wat4y) - Office: Gibson S123 & Physics 218, (434) 924-0538

Physics Demo Manual

Demonstrations are cataloged according to PIRA Bibliography


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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 Thermal Properties Of Matter
 Heat And The First Law
 Change Of State
 Kinetic Theory
 Gas Law
 Entropy And The Second Law
  video  - Reversible and Irreversible Processes
  video  - Stirling Engine
  video  - Steam Engine
 Heat Engines

Heat Engines


To illustrate the 'heat engine' principle.


To facilitate evaporation, fill beaker with a solution of 75% water and 25% methanol. However, straight water works just fine. Dip Mr. Duck's head into the solution and let him continue on his own as he is always very thirsty. The heat engine bulbs work in the same manner.
Pasco heat engine model requires two reservoirs (boiling water and ice water). Dip the cylinder into ice water and then into boiling water to lift a weight sitting on top of the piston.


  • 1 250 ml. Beaker
  • Dipping Duck Toy
  • Heat Engine Bulbs