A

David

Darling

physics

Physics is the branch of science concerned with the study of matter and energy. Physics seeks to identify and explain their many forms and relationships. Modern physics recognizes four basic forces in nature: gravitation, which was first adequately described by Isaac Newton; the electromagnetic force, codified in the nineteenth century by Maxwell's equations; the weak nuclear force, which is responsible for the decay of some subatomic particles; and the strong nuclear force, which binds together atomic nuclei.

 

Physics rests on six fundamental theories:

 

Newtonian mechanics
thermodynamics
electromagnetism
statistical mechanics
relativity
quantum mechanics

 

Branches of physics include

 

particle physics
geophysics
biophysics
astrophysics
atomic and nuclear physics