A radioactive element decays by `beta`-emission. A detector records n-beta particles in 2 s and in next 2 s it records 0.45 n beta particles. Find mean life.

A radioactive element decays by beta-emission . A detector records n beta particles in 2 s and in next 2 s it records 0.75 n beta particles. Find mean life correct to nearest whole number. Given ln |2| = 0.6931 , ln |3|=1.0986 .

A radioactive element decays by beta-emission . A detector records n beta particles in 2 s and in next 2 s it records 0.75 n beta particles. Find mean life correct to nearest whole number. Given ln |2| = 0.6931 , ln |3|=1.0986 .

A radioactive element decays by beta-emission . A detector records n beta particles in 2 s and in next 2 s it records 0.75 n beta particles. Find mean life correct to nearest whole number. Given ln |2| = 0.6931 , ln |3|=1.0986 .

A radioactive element decays by beta -emission. A detector records n beta particles in 2 s and in next 2 s, it records 0.75 n beta particles .Find mean life correct to nearest whole number. Give that log_e2=0.6931 and log_e 3=1.0986 .

A radioactive element decays by beta- emission. A detector racords n -beta particles in 2 sec and in next 2 sec it records 0.65n -beta particles. Find mean life.

A radioactive element decays by beta- emission. A detector racords n -beta particles in 2 sec and in next 2 sec it records 0.65n -beta particles. Find mean life.

A radioactive element decays by beta- emission. A detector records " beta particles in 2 second it records (0.75 n beta particles (Given In2 = 0.6931, In3 = 1.0986). The mean life correct to nearest whole number is........... Second

A radioactive sample decays by ' beta -emission. In first 2 seconds, n beta -particles are emitted and in next 2 seconds, 0.25 n beta -particles are emitted. The half life of radioactive NUCLEI (in second) is