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Is the "perpetual clock" -- a rotating ball hanging from the ceiling by a very long cord --...?
...still in the Smithsonian?
This used to be a favorite exhibit, and I was trying to explain it to my brother last night. I can't find any information about it at the Smithsonian sites. I would like to know where it is, and any information about the mechanics of it. Thanks
Here is the link to the Smithsonian: http://www.si.edu/Encyclopedia_SI/nmah/pendulum.htm
It begins:
Information or research assistance regarding pendulums is frequently requested from the Smithsonian Institution. The following information has been prepared by the National Museum of American History's Division of Physical Sciences in cooperation with the Visitor Information and Associates' Reception Center's Public Inquiry Mail and Telephone Information Service Unit to assist those interested in this topic.
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 Project and there are no current plans to reinstall it.
The Foucault Pendulum is named for the French physicist Jean Foucault (pronounced "Foo-koh), who first used it in 1851 to demonstrate the rotation of the earth. It was the first satisfactory demonstration of the earth's rotation using laboratory apparatus rather than astronomical observations.
see the site for more
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