The decay contsnt of a radioactive substance is at the rate of 0.05 per hour. Calculate its half life and mean life .

Explanation

`lambda=0.05` per hour, `T=? tau=?`.Half life `T=(0.693)/(lambda)=(0.693)/(0.05)hr=13.86hrs.` Mean life `tau=(1)/(lambda)=(1)/(0.05)=20`hrs.