A chain reaction progresses when the average number of liberated neutrons that cause further fissions is
A)zero.
B)less than one.
C)one or more.
D)none of the above

Question

Quizplus · Accepted Answer

For a chain reaction to occur, the average number of liberated neutrons that cause further fissions must be equal to or greater than one. This is because each neutron that causes a fission releases several new neutrons, which can cause additional fissions, resulting in a self-sustaining chain reaction. If the average number of neutrons released per fission is less than one, the reaction will eventually die out, as there will not be enough neutrons to continue the chain reaction. Therefore, the correct answer is C - one or more.

A Chain Reaction Progresses When the Average Number of Liberated