A t approximately what time had the universecooled below
Chapter 44, Problem 44.35(choose chapter or problem)
A t approximately what time had the universecooled below the threshold temperature for producing(a) kaons (M 500 MeV/c2), (b) Y (M ~ 9500 MeV/c2),and (c) muons (M 100 MeV/c2)?
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