AP Physics 2hardmcq1 pt

In nuclear fission, a heavy nucleus splits into lighter nuclei. Which of the following best explains why energy is released in this process?

A.D) The strong nuclear force becomes stronger

B.B) The binding energy per nucleon decreases

C.A) The total number of nucleons increases

D.C) The total mass of the products is less than the mass of the original nucleus

Explanation

Core Concept

Energy is released in nuclear fission because the total mass of the products is less than the mass of the original nucleus. This mass difference is converted to energy according to Einstein's equation E=mc². The binding energy per nucleon actually increases for the products, which is why the process is energetically favorable.

Correct Answer

DC) The total mass of the products is less than the mass of the original nucleus

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