Activity Ratio

Initial ratio of active nuclei in two different sample is 2: 3 their half lives are 2 hr and 3hr respectively . Ratio of their activities at the end of 12 hr is :

Ratio of initial active nuclei in two different sample is 2:3 Their hafl lives are one hour and two hours respectively . Ratio of active nuclei at the end of 6 hours will be :

The ratio of two numbers is 5:7 . If 40 is added to each number, then ratio becomes 25:31 . Complete the following activity to find the numbers. Let the number of 5x. Then the second number is square . From the given condition,

Three samples of a radioactive substance have activity in a ratio 2 : 5 : 7 , then after two half lives the ratio of their activities will be:

Three samples of a radioactive substance have activity in a ratio 2 : 5 : 7 , then after two half lives the ratio of their activities will be:

The ratio activity of an element becomes 1//64 th of its original value in 60 sec . Then the half-life period is

The ratio activity of an element becomes 1//64 th of its original value in 60 sec . Then the half-life period is

The ratio activity of an element becomes 1//64 th of its original value in 60 sec . Then the half-life period is