If a 20-MeV Neutron Released in a Fission Reaction Loses Half Its

question 8

Multiple Choice

If a 2.0-MeV neutron released in a fission reaction loses half its kinetic energy in each moderator collision, how many collisions are needed to reduce its kinetic energy to $1 / 25 \mathrm { eV }$ ?

• A) 30
• B) 4
• C) 26
• D) 18
• E) 6

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Definitions:

Variable Administrative Expenses

Costs that vary in proportion to changes in an organization's activity level, such as sales commissions.

Sunk Cost

A cost that has already been incurred and cannot be recovered, and hence should not influence future business decisions.

Sunk Cost

Costs that have already been incurred and cannot be recovered or reversed.

Model 240 Machine

A hypothetical or specific name for a machine, possibly denoting a particular model or type used in manufacturing or industrial settings.