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The English physicist James Prescott Joule (1818-1889) proved that mechanical and thermal energies are interconvertible on a fixed basis, and thus he established the great principle of conservation of energy.

Good luck in your studies,
~ Mitch ~

2007-06-25 22:24:15 · answer #1 · answered by Mitch 7 · 0 0

http://en.wikipedia.org/wiki/SI

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2007-06-24 15:18:38 · answer #2 · answered by steven m 7 · 0 0

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