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mean free path
subjectfact 
mean free pathhas definition Mean length of the path of a particle between collisions.has source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:33:26.0
has definition The mean distance traversed by a particle before undergoing a significant deflection or collision.has source: Silk, J. 1990 The Big Bang, W. H. Publishers, New York, 2001-09-27 09:33:26.0
is a kind of length2001-09-27 09:33:26.0
lengthhas unit length unit2001-09-27 09:33:26.0
numberhas value2001-09-27 09:32:57.0