We discuss the meaning of gravitational entropy of the universe when quantum dissipative processes like cosmological particle production are important and propose to use the entropy generated in these processes
With its Greek prefix en-, meaning "within", and the trop- root here meaning "change", entropy basically means "change within (a closed system)". The closed system we usually think of when speaking of entropy (especially if we're not physicists) is the entire universe. But entropy applie...
t. The entropy is regarded as measured from some standard temperature and pressure. Sometimes called the thermodynamic function. The entropy of the universe tends towards a maximum. --Clausius.Meaning of Entropy from wikipedia- Entropy is a scientific concept, most commonly ***ociated with states...
The first records ofentropycome from around 1865. It comes from the Germanentropie, which combines the prefixen-, meaning “within or in,” and the combining form-trope, meaning “one turned toward.” Entropyis a measure of an increasingly complex situation that is happening within a system....
The idea of entropy comes from a principle of thermodynamics dealing with energy. It usually refers to the idea that everything in the universe eventually moves from order to disorder, and entropy is the measurement of that change.
We have shown that the Hubble parameter is positive and the deacceleration parameter fluctuates with time, meaning for certain period the universe accelerates and decelerates for other time.doi:10.1142/S0217751X02010893A. M. Haruar RashidA. L. Choudhuryinternational journal of modern physics a...
The physical meaning of entropy Entropy and "disorder" Entropy and probability Entropy, equilibrium, and time Absolute entropies Standard entropies of substances Entropy depends on concentration Summary of key concepts Concept map Entropy is one of the most fundamental concepts of physical science...
Unlike many books which apply the concept of entropy to systems for which it is not even defined (such as living systems, black holes and the entire universe), these applications will help the reader to understand the meaning of entropy. It also emphasizes the limitations of the applicability ...
Which are the areas of application of each entropy and their impact in the scientific community. 2. Building the Universe of Entropies In this section, we describe in detail how we built our universe of entropies. We describe the entropies, mathematical definitions, the respective origin, and...
Hence we have a physical meaning for the gravitational size of any mass m: it turns out to be the size of its gravitational influence, the actual size for the proton, the galaxies and the Universe. 3. The Gravitational Size and the Expansion of the Universe The gravitational size λg , ...