SCIENTISTS ACHIEVE NEGATIVE TEMPERATURE
Negative temperatures could be used to create heat engines — engines that convert heat energy to mechanical work, such as combustion engines — that are more than 100-percent efficient, something seemingly impossible. Such engines would essentially not only absorb energy from hotter substances, but also colder ones. As such, the work the engine performed could be larger than the energy taken from the hotter substance alone.
Read more: http://www.foxnews.c.../#ixzz2H8kulOxC
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Edited by StanleyAlexander, 05 January 2013 - 11:08 PM.