MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
| 1. |
A radioactive element decays by p emission. A detector records n beta particles in 2 second and in next 2 seconds it records \[0.75\text{ }n\] beta particles. Find mean life corrected to nearest whole number. Given \[\ell n2=0.6931\] and \[\ell n3=1.0986.\]. |
| A. | \[6.9\text{ }sec\] |
| B. | \[9.9\text{ }sec\] |
| C. | \[10.1\text{ }sec\] |
| D. | \[12.2\text{ }sec\] |
| Answer» B. \[9.9\text{ }sec\] | |