Code Number: 1A10.40

Demo Title: Clocks

Principle: Clock Synchronization

Area of Study: Mechanics

Equipment:

Clocks, Stopwatches, Hourglass.

Procedure:

The implications of Doppler and Speed of Light effects on GPS units and clock synchronization.

References:

Wilson J. Gonzalez-Espada, Kathryn Gallenstein, Katelyn Collins, "Can Clockwise Exist Without Clocks?", TPT, Vol. 60, #8, Nov. 2022, p. 653.
Hui Xiang Sim, Bernard Ricardo, "Understanding the Oscillatory Motion of Saxon Bowls: An Experimental and Theoretical Approach", AJP, Vol. 93, #6, June 2025, p. 447.
Laurence E. Dodd, "The Uncompensated Pendulum Clock", AJP, Vol. 22, #1, Jan. 1954, p. 9.
Kelsey Atherton, "A Brief History of Time (Keeping)", Popular Science, Sept/Oct 2017, p. 14-15.

Stopwatch applet

Disclaimer

These demonstrations are provided only for illustrative use by persons affiliated with The University of Iowa and only under the direction of a trained instructor or physicist. The University of Iowa is not responsible for demonstrations performed by those using their own equipment or who choose to use this reference material for their own purpose. The demonstrations included here are within the public domain and can be found in materials contained in libraries, bookstores, and through electronic sources. Performing all or any portion of any of these demonstrations, with or without revisions not depicted here entails inherent risks. These risks include, without limitation, bodily injury (and possibly death), including risks to health that may be temporary or permanent and that may exacerbate a pre-existing medical condition; and property loss or damage. Anyone performing any part of these demonstrations, even with revisions, knowingly and voluntarily assumes all risks associated with them.

Instructional Resources and Lecture Demonstrations

1A10.40 - Clocks

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