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physical phenomena > process > physical process > motion > mass motion > expansion > exponential expansion
Upexpansion

exponential expansion comparison table
Subject is a kind of has definition
expansionmass motion 
exponential expansionexpansionAn expansion described by a fixed doubling time. The size doubles after one doubling time, quadruples after two doubling times, octuples after three doubling times, etc.

Upexpansion