[DOC] [TLE] Entropy (arrow of time) - Wikipedia [PAR] Entropy is the only quantity in the physical sciences that requires a particular 
direction for time, ... However, in thermodynamic systems that are not closed, 
entropy can decrease with ... The Second Law of Thermodynamics is statistical in 
nature, and therefore its reliability ... See Boltzmann's Second Law as a law of 
disorder. [DOC] [TLE] Arrow of time - Wikipedia [PAR] The Arrow of Time, or Time's Arrow, is a concept developed in 1927 by the British 
astronomer ... The system is T-symmetrical but while going "forward" kinetic 
energy is ... Entropy can be thought of as a measure of microscopic disorder; thus 
the Second ... by the inorganic nature of the earth and its thermodynamic 
processes. [DOC] [TLE] Entropy - HyperPhysics [PAR] For an isolated system, entropy always increases or remains the same, so if you 
... The top diagram depicts time's arrow as pointing from order to disorder, but 
one ... So if you say that entropy is a measure of disorder, and that nature tends... [DOC] [TLE] Second Law of Thermodynamics - HyperPhysics [PAR] It's implications may be visualized in terms of the waterfall analogy. ... This is 
sometimes called the "first form" of the second law, and is referred to as the 
Kelvin-Planck statement of the second law. ... Entropy: a measure of the disorder 
of a system. ... isolated system with time, it is said to give us the direction of "time's 
arrow" . [DOC] [TLE] The Physics of Time Puzzle | Quanta Magazine [PAR] Sep 13, 2016 ... What insights can an LCD display give us about time's arrow? ... This idea, called 
stratified stability, was expounded almost 50 years ago by Jacob ... Entropy (
Measure of Disorder): The system is considered to be most orderly if all ... and 
why a whole object does not spontaneously re-form from its pieces. [DOC] [TLE] The arrow of time - Astronomy & Geophysics - Oxford Journals [PAR] Entropy is, roughly speaking, a measure of disorder, and when the second law ... 
slide towards a state of maximum entropy known as thermodynamic equilibrium. 
... the universe and the observer  the ultimate explanation of time's arrow will be 
.... dynamics of the gas (or any other system), but in its special initial conditions. [DOC] [TLE] Memory, Thermodynamics, and Time - Physics Central [PAR] Jun 30, 2014 ... We began with clocks based on the Earth rotating about its own axis such as 
sundials. ... Entropy measures the level of disorder or randomness of a system, 
and ... This is called heat death, and is when the universe reaches... [DOC] [TLE] The Arrow of Time - Scientific American [PAR] May 21, 2008 ... which way "time's arrow" is pointing; they define what I shall call ... measure of 
disorder. .... system of particles evolves (d), its dynamical state changes, and the 
change is ..... The (ordi nary) cosmological principle, so named. [DOC] [TLE] The Arrow of Time  Exactly What Is Time? [PAR] The concept of entropy and the decay of ordered systems was explored and 
clarified by ... the overall picture of a universe progressing inexorably towards 
disorder. .... to physics, causality appears to be intimately bound up with time's 
arrow. ... the direction of the arrow of time on what is sometimes called the weak 
anthropic... [DOC] [TLE] The Arrow of Time - The Information Philosopher [PAR] He connected "Time's Arrow" to the one-way direction of increasing entropy 
required by ... In the nineteenth century, this was called the "heat death" of the 
universe. ... Given the second law of thermodynamics, which says that any 
system will over time approach a thermodynamic equilibrium of maximum 
disorder or entropy,... [DOC] [TLE] On the Relation of Entropy with Gravity  Young Scientists Journal [PAR] Sep 26, 2016 ... Entropy is a measure of disorder or multiplicity of a system, or the amount of 
energy unavailable to do work. For an isolated ... freedom by the statistical

Question: Called "time's arrow", it's a measure of disorder in a system
Answer: Entropy