Final answer:
Physics contributions to 20th-century science history relate most to the topic of splitting the atom to make a weapon.
Step-by-step explanation:
The topic that relates the most to both physicists' contributions to 20th-century science history is splitting the atom to make a weapon. During the 20th century, physicists made significant advancements in nuclear physics, which eventually led to the ability to split the nucleus of an atom, known as nuclear fission. This process was the basis for the development of nuclear power plants and nuclear weapons.