Talk:PlanetPhysics/Equilibrium

Original TeX Content from PlanetPhysics Archive

%%% This file is part of PlanetPhysics snapshot of 2011-09-01 %%% Primary Title: equilibrium %%% Primary Category Code: 05.70.-a %%% Filename: Equilibrium.tex %%% Version: 3 %%% Owner: pahio %%% Author(s): pahio %%% PlanetPhysics is released under the GNU Free Documentation License. %%% You should have received a file called fdl.txt along with this file. %%% If not, please write to gnu@gnu.org. \documentclass[12pt]{article} \pagestyle{empty} \setlength{\paperwidth}{8.5in} \setlength{\paperheight}{11in}

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In the \htmladdnormallink{mechanics}{http://planetphysics.us/encyclopedia/Mechanics.html}, a body is in (mechanical) {\em equilibrium}, if it is either at rest or moves in a straight line with constant \htmladdnormallink{velocity}{http://planetphysics.us/encyclopedia/Velocity.html} and is not in an accelerated rotational \htmladdnormallink{motion}{http://planetphysics.us/encyclopedia/CosmologicalConstant2.html}.\, This means that the \htmladdnormallink{vector}{http://planetphysics.us/encyclopedia/Vectors.html} sum of all forces and the vector sum of all torques acting on the body vanish.

A \htmladdnormallink{system}{http://planetphysics.us/encyclopedia/SimilarityAndAnalogousSystemsDynamicAdjointnessAndTopologicalEquivalence.html} is in {\em thermodynamic equilibrium}, if its \htmladdnormallink{observable}{http://planetphysics.us/encyclopedia/QuantumSpinNetworkFunctor2.html} (macroscopic) properties do not alter with time.\, This contains \begin{itemize} \item the {\em thermal equilibrium}, i.e. the \htmladdnormallink{temperature}{http://planetphysics.us/encyclopedia/BoltzmannConstant.html} is the same in every point; \item the {\em chemical equilibrium}, i.e. the consistency does not alter; \item the {\em mechanical equilibrium}, i.e. there is no macroscopic motion within the system. \end{itemize}

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