Used in print
(William G. Pollard, Physicist and Christian....)
The concept of unity , in which positive and negative are attributes of the same force , in which good and evil are relative , ever-changing , and always joined to the same phenomenon - such a concept is still reserved to the physical_sciences and to the few who have grasped the history of ideas .
(Frank Oppenheimer, "Science and Fear-- A Discussion...)
In the physical_sciences , these achievements concern electricity , chemistry , and atomic_physics .