00:01
In this question we have the activity of the disintegration is given by lambda into n.
00:07
So, where n is given by n naught into e power minus lambda t where n naught is the initial number of the particle and lambda is the decay constant given by 0 .693 divided by t half.
00:17
So, 0 .693 by half life period is 5730 per year.
00:23
So, here we have for living matter.
00:27
So, we have living matter where r1 will be equal to 15 .3 counts per hour per gram which is equal to 4 .1 divided by 60 counts per minute.
00:43
So, counts per minute per gram.
00:47
So, we have r1 by r2 is equal to lambda n naught e power minus lambda 1 into t divided by lambda n naught e power minus lambda into t 1 lambda is constant.
01:00
So, where the value of lambda is.
01:04
So, substituting for lambda as.
01:07
So, first we have lambda lambda and n naught n naught get cancelled...