Author Question: A certain radioactive isotope placed near a Geiger counter registers 160 counts per minute. Eight ... (Read 101 times)

rl · **on:** Jul 29, 2018

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

A) 8 hours
B) 6 hours
C) 4 hours
D) 2 hours
E) none of the above

Question 2

An emf is induced in a wire by moving the wire near a magnet.

Indicate whether the statement is true or false