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Home Q & A Board Science-Related Homework Help Physics Astronomy
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tcromwell tcromwell
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6 years ago
If a nuclide has a decay constant of 0.765  10-6 s-1 and contains 3.0  1017 nuclei
 
  (a) what is the half life?
  (b) what is its initial activity?
  (c) what is the activity after 12. days?

Question 2

In the fissioning of uranium, the typical amount of energy released per nucleon is
 
  A) 0.025 eV.
  B) 100 MeV
  C) 0.9 MeV.
  D) 200 MeV.
  E) 10 MeV

Question 3

An old bone sample contains 321. grams of carbon and its activity is 947. decays/min. (5730. yr half life of Carbon-14)
 
  (a) How many thousand years old is the sample?
  (b) What will be the activity of the sample 2000. yrs from now?

Question 4

What is the Q-value of the following reaction?
 
  14N + 4He = 1p + 17O
   (14.003074 ) (4.002603 ) (1.007825 ) (16.999131 )
  A) 11.91 MeV
  B) 1.191 MeV
  C) -1.191 MeV
  D) 1.279  10-3 MeV
  E) -1.279  10-3 MeV

Question 5

A nuclear reaction starts with 1.71 MeV of kinetic energy and a rest energy of 28.2 GeV. If the reaction releases 1.10 MeV, what was the Q of the reaction?
 
  A) 11.0 MeV
  B) 1.10 MeV
  C) 6.60 MeV
  D) 0.60 MeV
  E) 28.8 GeV
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DeloreanDelorean
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6 years ago
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tcromwell Author
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6 years ago
This calls for a celebration Person Raising Both Hands in Celebration
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