Multiple Choice
A radioactive source has a half-life of 2 min.At time t = 0 it is placed near a detector and the counting rate is observed to be 3000 counts/s.The counting rate at t = 4 min will be
A) 1500 counts/s
B) 750 counts/s
C) 375 counts/s
D) 188 counts/s
E) 94 counts/s
Correct Answer:
Verified
Correct Answer:
Verified
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