The half-life of ._(38)^(90)Sr is 20 years. If its sample having initi – InterviewSolution

1.	The half-life of ._(38)^(90)Sr is 20 years. If its sample having initial activity of 800 dis/min is taken, what would be its activity after 80 years
Answer» 500 dis/min 800 dis/min 1000 dis/min 1600 dis/min Solution :80 years = 4 half lives Activity aftern half lives `= (1)/(2^(n)) xx a`

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