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Science Forum Index » Energy - Hydrogen Forum » NIST Creates Perpetual Motion ... But Only for 10 Seconds
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| Silver |
 Posted: Thu Mar 27, 2008 10:15 pm |
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"Practical" applications still years away for perpetual motion
The National Institute of Standards and Technology, in conjunction with the
University of Maryland's Joint Quantum Institute, created a short-lived
"proof of concept" of perpetual motion. Using an exotic type of matter known
as a Bose Einstein condensate, or BEC, the team demonstrated true perpetual
motion. Though the state persisted only ten seconds, team members say it
will one day lead to real-world applications.
The so-called "fifth state of matter," Bose Einstein condensates were
predicted as early as 1925, but it took 70 years to demonstrate them in a
laboratory setting. They form when matter is cooled to the point that the
atoms collapse to the lowest energy state, allowing quantum effects to
manifest on a macroscopic scale. BECs, also known as "superfluids," have a
number of strange properties, such as a total lack of any form of friction
and the ability to spontaneously flow out of an open container.
Usually barred by the laws of thermodynamics, perpetual motion is possible
at the macroscopic level when friction is completely eliminated -- the state
one finds in a BEC. The NIST demonstration used laser-cooled sodium atoms
flowing within a torus to demonstrate the superfluid state. So far, their
longest attempt persisted for only ten seconds; the team is attempting to
lengthen the period in a future prototype.
While ten seconds of perpetual motion may not be terribly impressive to the
layman, NIST officials say it may one day lead to novel applications, such
as lossless energy storage, ultra-sensitive navigation sensors, and others.
Earlier this year, a team of physicists at Harvard used a BEC to directly
convert energy and matter into each other. |
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