Function Conjunction → The Anatomy of a Physical Expression
From S.H.O.
Factors serve as The Anatomy of a Physical Expression. They come in several types as listed below, each characterized as having a distinct role in defining a property of a physical system. The following list items are partially underlined to make memorization easy:
 Constants
 Coefficients
 Quantities
 Proximities
 Dislocations
 Directions
Contents
Definition
Constant (or 1)  

Coefficient (or 1)  
Quantity (or 1)  
Proximity (or 1)  
Dislocation (or 1)  
Direction (or 1)  
A Physical Expression 
Constants
 = Speed of Light
 = Gravitational constant
 = Boltzmann's constant
 = Fine Structure constant
 = Magnetic Permeability of Free Space
 = Electric Permittivity of Free Space
Coefficients
 = Relative Magnetic Permeability
 = Relative Electric Permittivity
Quantities
 = point charge
 (for continuous charge) = linear charge density
 (for continuous charge) = surface charge density
 (for continuous charge) = volume charge density
 = mass
 = volume mass density
Proximities
 = inverse of the magnitude of the separation between positions and
 = inverse square of the magnitude of the separation between positions and
Dislocations
 = position
 = velocity
 = acceleration
Dislocations according to an inertial observer at time
 = position of a charge at time , when it receives a light signal from that was emitted earlier at the retarded time
 = = velocity of a charge at time , when it receives a light signal from that was emitted earlier at the retarded time
 = = acceleration of a charge at time , when it receives a light signal from that was emitted earlier at the retarded time
 = position a charge had at the retarded time , when it emitted a light signal which has now reached at position and time
 = = velocity a charge had at the retarded time , when it emitted a light signal which has now reached at position and time
 = = acceleration a charge had at the retarded time , when it emitted a light signal which has now reached at position and time
Directions
 = position unit vector
 = velocity unit vector
 = acceleration unit vector
Directions according to an inertial observer at time
 = position unit vector of at time
 = velocity unit vector of at time
 = acceleration unit vector of at time
 = position unit vector of at retarded time
 = velocity unit vector of at retarded time
 = acceleration unit vector of at retarded time
See also
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HQ ● Glossary ● April 2016 Presentation
