Photo credit: The Video Encyclopedia of Physics Demonstrations
Newton’s Laws of Motion
This photo shows a version of Hero's Engine, in this case a flask of water with two openings, pivoted so it can rotate. Click on the photo to see what happens after the Bunsen burner has brought the water to a boil. Two jets of steam shoot out, and the flask spins, in a demonstration of action and reaction (see Rocket Principles and Newton's laws). The reaction forces produce a torque that spins the flask.
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Soda Pop Can Hero Engine
You can demonstrate action-reaction with an easy-to-build Hero's Engine built from a soda can. Just follow the directions at Soda Pop Can Hero Engine, and be sure to have an adult working with you.