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Author Question: Homer says that we can safely use nuclear power because all radioactive nuclei are gone after two ... (Read 37 times)

Mr.Thesaxman

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Homer says that we can safely use nuclear power because all radioactive nuclei are gone after two half-lives. Marge says that only the decay rate is zero after two half-lives. Which one, if either, is correct, and why?
 a. Homer, because half of the nuclei disintegrate in each half-life.
  b. Marge, because the number of decays per unit time is halved in each half-life.
  c. Homer, because it's safe to handle radioactive substances after two half-lives.
  d. Both, because when all nuclei disintegrate the decay rate is also zero.
  e. Neither, because one quarter of the nuclei are left after two half-lives.

Question 2

The International Date Line is a theoretical line following approximately the ______________ meridian.
 Fill in the blank(s) with correct word



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ambernicolefink

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Answer to Question 1

e

Answer to Question 2

180




Mr.Thesaxman

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Reply 2 on: Jul 28, 2018
:D TYSM


ryhom

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Reply 3 on: Yesterday
Excellent

 

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