What is activity?, Number of decays per second, What is the unit of activity?, Becquerel (Bq), What does 1 Becquerel mean?, 1 decay per second, What is the equation for activity?, A = N / t, What does A represent?, Activity, What does N represent?, Number of decays, What does t represent?, Time in seconds, Why must time be in seconds?, Because activity is measured per second, Convert 2 minutes to seconds, 120 seconds, Calculate A if N=100 and t=20, 5 Bq

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