Which of the following statements about nuclear reactions is most ...

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Which of the following statements about nuclear reactions is most true?
  a. For high energies, the reaction is likely to be a compound nucleus reaction.
  b. At low energies, the reaction is likely to be a direct reaction.
  c. Nuclear reactions around a few hundred MeV are generally referred to as medium-energy nuclear reactions.
  d. Pions begin emerging from nuclear reactions at a little over 48 MeV.

Question 2

Which of the following statements is most true?
 

a. Differential cross sections have values that are the same at all scattering angles .
  b. Total cross sections indicate the total probability of a scattering reaction.
  c. Exoergic reactions indicate that kinetic energy is converted into mass.
  d.Endoergic reactions indicate that energy is released in a nuclear reaction.

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Answer to Question 1

correct answer is c.

Answer to Question 2

b. the total cross section is related to probability.

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