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Purpose:To illustrate the 'heat engine' principle.
Procedure:Fill beaker with a solution of 75% water and 25% methanol (this facilitates quick evaporation). 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.
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