At time , the activity of a radioactive substance is . At , its activity is . Find…

PHYSICS · Subjective · A Level · Physics · Nuclear physics · Nuclear physics

Problem

At time

t=0

, the activity of a radioactive substance is

1600\,\mathrm{Bq}

. At

t=8\,\mathrm{s}

, its activity is

100\,\mathrm{Bq}

. Find the activity at

t=2\,\mathrm{s}