question_answer 44)

  Which sample, A or B shown in Fig. 8(EP).3 has shorter mean-life?

Answer:

                  From Fig. 8(EP).3, we find that                   Therefore,                     At any subsequent time,                                                 As           (rate of decay of B is slower)                                            Hence,     i.e., mean life time of B is shorter than that of  A.