Lecture Demonstrations Laboratory

The Demonstrations Manual

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Measurement
Motion In One Dimension
Motion In Two Dimensions
Newton's First Law
Newton's Second Law
Newton's Third Law
Statics Of Rigid Bodies
Applications Of Newton's Laws
Gravity
Work and Energy
Momentum
Rotational Motion: Rotational Inertia Rods; Rolling Objects and Moments of Inertia; Moment of Inertia Wheel; The Falling Rigid Body; Vector Nature of Angular Momentum and Conservation of the Same; Hero's engine; Precession of a Bicycle Wheel Gyroscope Under Gravitational Force; Suitcase Gyro; Air Gyro; Gyrocompass; Gyroscopes
Properties of Matter

Hero's engine

Purpose:

To demonstrate conservation of angular momentum of an isolated system.

Procedure:

Fill the Hero's Engine flask with water well below the level of the two reaction jets. Put the cork stopper. Heat the water using a Bunsen burner.

Hints:

First described by Hero of Alexandria (10-70 AD) as a steam-powered device called an aeolipile known today as a "Hero engine". It is considered to be the first recorded steam engine.

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