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Author Question: Background radiation from cosmic rays and radioactive nuclei in our surroundings is about 0.13 ... (Read 177 times)

torybrooks

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on: Jul 28, 2018
Background radiation from cosmic rays and radioactive nuclei in our surroundings is about 0.13 rem/year. Suppose we assume this all comes from cosmic rays which have an RBE factor of 1.0 . The RBE factor for the most dangerous types of radiation is 20 . How many rads of the most dangerous radiation could a 100-year-old person have been exposed to in her lifetime without having gone over the recommended limit of 0.5 rem/year?
 a. 0.37
  b. 0.50
  c. 1.85
  d. 13
  e. 37

Question 2

Six months of darkness at the North Pole begins when the Sun is at the
 a. winter solstice.
  b. summer solstice.
  c. autumnal equinox.
  d. vernal equinox.


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Jossy

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

c

Answer to Question 2

c


torybrooks

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Reply 2 on: Jul 28, 2018
Gracias!

lcapri7

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Reply 3 on: Yesterday
Excellent

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