A radioactive substance decays to `((1)/(16))^(th)` of its initial activity in 40 days. The half-life of the radioacctive substance expressed in days is

A radioactive substance decays to ((1)/(16))^(m) of its initial activity in 40 days. The half-life of the radioacctive substance expressed in days is

A radioactive substance decays to ((1)/(16))^(th) of its initial activity in 80 days. The half life of the radioactive substance expressed in days is …….

The half-life of a radioactive substance is 10 days. This means that

A certain substance decays to 1//32 of its initial activity in 25 days. Calculate its half-life.

If a radioactive substance reduces to (1)/(16) of its original mass in 40 days, what is its half-life ?

A radioactive element decays to 1//32th of its initial activity in 25 decay. Calculate its half life.

A radioactive substance reduces to 1/32 of its original value in 300 days. The half life of radioactive substance is

A radioactive substance decays to (3)/(4) th of original value in 2h. The half-life of the substance is

A radioactive substance decay to 1/5 of its original value in 56 days. The decay constant is