Multiple Choice
A certain radioactive isotope placed near a Geiger counter registers 160 counts per second. Eight hours later, the counter registers 10 counts per second. What is the half life of the isotope?
A) 4 hours
B) 6 hours
C) 8 hours
D) 2 hours
E) none of these
Correct Answer:
Verified
Correct Answer:
Verified
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