45 A 50 Co source is labeled 4 3 mCi but its present

Last updated: 6/8/2023

45 A 50 Co source is labeled 4 3 mCi but its present activity is found to be 1 71x107 Bq a What is the present activity in mci mci b How long ago in years did it actually have a 4 00 mCi activity