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Pastimes : Clown-Free Zone... sorry, no clowns allowed
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To: KeepItSimple who wrote (167125)5/21/2002 11:36:28 PM
From: Kitskid   of 436258
 
science.uwaterloo.ca
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<<Today the critical mass is known to be 300 g (2/3 lb) and 900 g (2 lb) respectively for pure 239Pu and 235U. The critical mass depends on the shape and purity of the sample>>
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