physics
noun
°The branch of science concerned with the study of properties and interactions of space, time, matter and energy.
"Newtonian physics was extended by Einstein to explain the effects of travelling near the speed of light; quantum physics extends it to account for the behaviour of atoms."
°Of or pertaining to the physical aspects of a phenomena or a system, especially those studied in physics.
"The physics of car crashes would not let Tom Cruise walk away like that."