equilibrium
State of a system in which the defining variables (temperature, pressure, chemical potential) have constant values in time.
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Equilibrium: In relation to radiation, the state at which the radioactivity of consecutive elements within a radioactive series is neither increasing nor decreasing.
equilibrium theory A model under which it is assumed that the waters covering the face of the Earth instantly respond to the tide-producing forces of the Moon and Sun to form a surface of equilibrium under the action of these forces.
Equilibrium Yield (EY)
The yield in weight taken from a fish stock when it is in equilibrium with fishing of a given intensity, and (apart from effects of environmental variation) its biomass is not changing from one year to the next.
Equilibrium Species
1) Species whose population exists in equilibrium with resources and at a stable density. 2) A species that has a life history characterized by long life, long development time to reach maturity, low death rates, ...
General Equilibrium Theory: Theory that demonstrates the advantage of looking beyond first-stage effects.
Equilibrium or balance is any of a number of related phenomena in the natural and social sciences. In general, a system is said to be in a state of equilibrium if all influences on the system are cancelled by the effects of others.
Equilibrium: Condition that exists in a system when the system does not undergo any change of properties with the passage of time; usually multiple forces produce a steady balance, resulting in no change over time.
Equilibrium
When the reactants and products are in a constant ratio. The forward reaction and the reverse reactions occur at the same rate when a system is in equilibrium.
Equilibrium Constant ...
Price at equilibrium: Where supply and demand curves intersect. The price at equilibrium is what allocates resources.
Price gouging: Excessive water rate increases that are unfair to water customers.
Non-equilibrium theory In community ecology, concerned with the transient behavior of a system away from any equilibrium point, it specifically focuses attention on time and variation.
tension (pression de l'eau du sol) The pressure (positive or negative), in relation to the external gas pressure on the soil water, to which a solution identical in composition with the soil water must be subjected in order to be in equilibrium ...
seiche an oscillation of water reestablishing equilibrium after having been disturbed
seral stage one of the transitional communities that becomes established during the process of ecological succession. See Succession, ecological.
An index reflecting the equilibrium pH of a water with respect to calcium and alkalinity. This index is used in stabilizing water to control both corrosion and the deposition of scale.
radiative-convective models Thermodynamic models that determine the equilibrium temperature distribution for an atmospheric column and the underlying surface, ...
Photostationary State - This describes a condition in which there is equilibrium in a photochemical reaction. For this condition to take place the rate of dissociation of the reactants has to be equal to the rate of their recombination.
It is necessary to know the value of the equilibrium constant of the reaction for each acid in order to calculate its pH.
Carbon is constantly moving between some of these forms, maintaining a state of dynamic equilibrium.
A measure of a substance's propensity to evaporate, vapour pressure is the force per unit area exerted by vapour in an equilibrium state with surroundings at a given pressure. It increases exponentially with an increase in temperature.
Langelier Index (L.I.) An index reflecting the equilibrium pH of a water with respect to calcium and alkalinity. This index is used in stabilizing water to control both corrosion and the deposition of scale. Langelier Index = pH - pHs ...
Steady state economy is a human economy characterized by constant population, capital stocks and rate of material/energy throughput such that there is sustainable equilibrium between human activities and the environment.
Static Pressure: Condition that exists when an equal amount of air is supplied to and exhausted from a space. At static pressure, equilibrium has been reached.
Vapor Pressure: The pressure, often expressed in millimeters of mercury (mm Hg) or pounds per square inch (PSI), that is characteristic at any given temperatures of a vapor in equilibrium with its liquid or solid form.
At the vernal equinox (always March 20 or March 21), night and day are the same length everywhere on Earth, and McConnell believed that Earth Day should be a time of equilibrium when people could put aside their differences and recognize their ...
ecosphere is that all organisms live in balance with one another in a system that is continually evolving and changing whilst still maintaining the environment which supports the organisms' survival. This balance is called "ecological equilibrium".
 See also: Water, Soil, Environment, Air, Table
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