09-10-2016
Physics

Answered

A certain radioactive isotope placed near a Geiger counter registers 160 counts per second. 32 hours later, the counter registers 10 counts per second. What is the half-life of the isotope?

Verified Answer :

09-10-2016

8 hours

160>80>40>20>10
Count how many arrows are there, 4 arrows, so
32/4=8

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