It's callled a Foucault Pendulum. They have a beautiful one at the California Academy of Sciences in Golden Gate Park, to show that the Earth rotates. Each time my family goes to the museum we make it ...
A Foucault pendulum is a simple device for observing the Earth's rotation. While such pendulums have been around for more than 150 years and are a staple of the modern science museum, they are ...
The Foucault pendulum which was displayed for many years in the Smithsonian's National Museum of American History was removed in late 1998 to make room for the Star-Spangled Banner Preservation ...
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