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Author Question: A beam of 1-MeV gamma rays incident on a piece of 0.50-cm thick lead is reduced by 50 of its initial ... (Read 85 times)

RRMR

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on: Jul 28, 2018
A beam of 1-MeV gamma rays incident on a piece of 0.50-cm thick lead is reduced by 50 of its initial value. How thick must the lead be to reduce the beam to one percent of its initial value?
 a. 1.1 cm
  b. 2.2 cm
  c. 3.3 cm
  d. 4.4 cm
  e. 8.4 cm

Question 2

At which latitude is the noonday Sun overhead only once a year?
 a. 10S
  b. 23S
  c. 4N
  d. 30N


steff9894

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Reply #1 on: Jul 28, 2018
Answer to Question 1

c

Answer to Question 2

d


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