[AntonioLao]

The title phrase is the statistical equivalent of a regression toward the mean or axis of symmetry of the normal distribution.

Partially, it can be used to describe the tendency of the universe moving toward absolute zero of temperature at maximum entropy. This tendency toward the middle became the law of averages and can be observed among members of any population, be they stars or galaxies, human beings or the varieties of evolutionary processes of plants and animals.

For the universe, if the temperature is exactly zero then the universe is dead. And all particles’ motions (momenta and angular momenta) are also zeros. The dynamic universe comes to a complete stop, and all forces and energies disappear. This picture does not really represent the middle ground of a normal distribution rather it represents the memoryless exponential distribution of a time evolution of the universe.

http://mathworld.wolfram.com/Memoryless.html

http://mathworld.wolfram.com/ExponentialDistribution.html

[Guille]

Then being at higher temperatures would give a longer life to the universe?

Another more general and important question: What energy is more common in the universe, or is growing more? That is, to what kind of energy does most of the energy transfer/convert to? Is it heat, or KE, or PE...?

[AntonioLao]

Originally Posted by GUILLE What energy is more common in the universe, or is growing more?

Primary forces seem to form potential energy and secondary forces form kinetic energy. Primary forces are repulsive. Primary forces attract the secondary forces from kinetic energy. Primary forces are local infinitesimal forces while secondary forces are global long range forces. A good example of primary force is the strong nuclear force and maybe also the weak nuclear force. Examples for secondary forces are gravity and electromagnetic force.

[Guille]

Originally Posted by AntonioLao Primary forces seem to form potential energy and secondary forces form kinetic energy. Primary forces are repulsive. Primary forces attract the secondary forces from kinetic energy. Primary forces are local infinitesimal forces while secondary forces are global long range forces. A good example of primary force is the strong nuclear force and maybe also the weak nuclear force. Examples for secondary forces are gravity and electromagnetic force.

This distinction is interesting. I have several questions:

1. As primary forces are repulsive, then are secondary forces atractive?
2. Do you devide between two types of kinetic energy (one for each of the primary forces) and between two types of the potential energy (one for each of the secondary forces)?
3. Isn't mass a type of potential force? If so, how could gravity be a secondary force?

[mkirkpatrick]

What power there is within a thought, an Idea, thoughts are things, and things
become Worlds-and sand eels as well? Just a thought!
regards michael.