Time is any change in the growth or decay of a system, and is proportional to the loss or gain of energy within the system.
Matter and energy are constantly being converted into new forms of energy at different time rates.
Various systems are determined by mechanical, thermodynamic, or electromagnetic energy.
The total energy of a system is referred to as the mass-energy relation, and is expressed as the product of the mass and the square of the speed of light.
In a local system, the rate of energy loss or gain depends upon the rate of increase or decrease of mass, velocity, density, and pressure.
For example, water exists in the Earth’s atmosphere in the form of gas, liquid, and solid, and adds and extracts heat from the air at different rates whenever it changes from one form to another.
When a system is at rest, such as a solid object, the energy of its constituent parts creates an interactive balance which results in a stable coherence. The greater the state of disorder of a system, the less its coherence.
Minerals and rocks will remain stable for many years due to the spontaneous interaction of the atoms which comprise their crystalline structures. Eventually, the rocks will decompose, caused by the tendency of the constituent particles to breakdown due to mechanical and chemical weathering.
Time is the rate of change of momentum.
Momentum is the product of mass and density at a given speed.
The momentum of a moving body is a measure of both the absolute motion of the body against the averaged density of the medium, and the quantity of substance contained within the body.
A bird in flight will move through the air at a time rate which is consistent with the pressure and density of the air, the size of the bird, and its wing speed.
The line it is drawn
The curse it is cast
The slow one now
Will later be fast
As the present now
Will later be past
The order is
And the first one now
Will later be last
For the times they are a-changin’.
– Bob Dylan