Saved Bookmarks
| 1. |
During the nuclear explosion,one of the products ""^(90)Sr was absorbed in the bones of a newly born baby in place of ca .How much time in years is required to reduce it by 90% if it is not lost metabolically? (t_((1)/(2))=6.93 years) |
|
Answer» Solution :It TAKES 23.03 YEARS All nuclear REACTION follow FIRST order reaction and so, `t_((1)/(2))=(0.693)/(lambda)` [where `lambda`=0.1 (`"year"`^(-1))] `t=(2.303)/(lambda)` log `((90)/(at))` `t=(2.303)/(0.1)` log `((90)/(0.190))` On simplifying above reactionwe get t=23.03 years |
|