An Etymological Dictionary of Astronomy and Astrophysics
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فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 67 Search : dynamic
thermodynamic potential
  توند ِ گرماتوانیک   
tavand-e garmâtavânik

Fr.: potentiel thermodynaique   

A measure of the energy level of a → thermodynamic system. It represents the amount of → work obtainable when the system undergoes a → change. The main types of thermodynamic potential are: → internal energy, → enthalpy, the → Helmholtz free energy, and the → Gibbs free energy.

thermodynamic; → potential.

thermodynamic process
  فراروند ِ گرماتوانیک   
farâravand-e garmâtavânik

Fr.: processus thermodynamique   

An ordered set of → equilibrium states undergone by a → thermodynamic system. Thermodynamics processes have various types: → cyclic process, → reversible process, and → irreversible process, → isothermal process, → adiabatic process, → isentropic process.

thermodynamic; → process.

thermodynamic system
  راژمان ِ گرماتوانیک   
râžmân-e garmâtavânik

Fr.: système thermodynamique   

A quantity of substance or a working machine which in a well-defined way is set apart from its → environment. The boundary between the system and its surroundings can be real or an imaginary mathematical envelope. A thermodynamic system is not necessarily bound to a predefined geometry. Thermodynamic systems can be divided into three types: → open systems, → closed systems, and → isomated systems.

thermodynamic; → system.

thermodynamic temperature
  دمای ِ گرماتوانیک   
damâ-ye garmâtavânik

Fr.: température thermodynamique   

A temperature scale, measured in → kelvin (K), that is related to the energy possessed by matter; it was formerly known as → absolute temperature. The zero point on the scale (0 K) is absolute zero. Thermodynamic temperature can be converted to temperature on the → Celsius scale by subtracting 273.15.

thermodynamic; → temperature.

thermodynamics
  گرماتوانیک   
garmâtavânik

Fr.: thermodynamique   

A branch of physics concerned with the relations between heat and other forms of energy and how these affect temperature, pressure, volume, mechanical action, and work.

thermo-; → dynamics, coined by the Scottish physicist William Thomson (Lord Kelvin, 1824-1907), in 1849.

third law of thermodynamics
  قانون ِ سوم ِ گرماتوانیک   
qânun-e sevom-e garmâtavânik

Fr.: troisième loi de la thermodynamique   

The → entropy of an idealized state of maximum order is zero at the temperature of → absolute zero. Another version of this law: As a system approaches absolute zero, all processes cease and the entropy of the system approaches a minimum value.

third; → law; → thermodynamics.

zeroth law of thermodynamics
  قانون ِ صفرُم ِ گرماتوانیک   
qânun-e sefrom-e garmâtavânik

Fr.: loi zéro de la thermodynamique   

Two objects that are in → thermal equilibrium with a third object will be in thermal equilibrium with each other.

zero; → law; → thermodynamics.

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