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Author Question: The half-life of radioactive iodine-137 is 8.0 days. How many iodine nuclei are necessary to produce ... (Read 175 times)

azncindy619

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on: Jul 29, 2018
The half-life of radioactive iodine-137 is 8.0 days. How many iodine nuclei are necessary to produce an activity of 1.0 Ci? (1 Ci = 3.70  1010 Bq)
 
  A) 4.6  109 B) 7.6  1012 C) 2.9  109 D) 3.7  1010

Question 2

In a certain velocity selector consisting of perpendicular electric and magnetic fields, the charged particles move toward the east, and the magnetic field is directed to the north. What direction should the electric field point?
 
  A) downward
  B) toward the west
  C) toward the south
  D) toward the east
  E) upward
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Cheesycrackers

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Reply #1 on: Jul 29, 2018
Answer to Question 1

D

Answer to Question 2

A


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