JEE Main 2005 Physics question
Starting with a sample of pure Cu, 7/8 of it decays into Zn in 15 minutes. The corresponding half-life is
Answer: (3)
Solution
Remaining fraction , so 15 minutes is three half-lives: minutes, option (3).
Starting with a sample of pure Cu, 7/8 of it decays into Zn in 15 minutes. The corresponding half-life is
Remaining fraction , so 15 minutes is three half-lives: minutes, option (3).