An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 27 Search : pressure
sound pressure
  فشار ِ صدا   
fešâr-e sedâ

Fr.: pression de son   

The periodic fluctuation above and below atmospheric pressure created by an oscillating body which provides the → sound power. Instantaneous sound pressure is the peak value of air pressure.

sound; → pressure.

stagnation pressure
  فشار ِ ناروانی   
fešâr-e nâravâni

Fr.: pression de stagnation   

The sum of → static pressure and → dynamic pressure in the → Bernoulli equation.

stagnation; → pressure.

standard temperature and pressure (STP)
  دما و فشار ِ استانده   
damâ o fešâr-e estândé

Fr.: conditions normales de température et de pression   

1) The most commonly used definition is temperature of 273.15 K (0 °C) and pressure of 1 → atmosphere.
2) Chemistry: Temperature of 273.15 K (0 °C) and pressure of 105  → pascal (Pa)s (1 → bar). International Union of Pure and Applied Chemistry (IUPAC) recommends that the former use of the pressure of 1 atm as standard pressure (equivalent to 1.01325 × 105 Pa) should be discontinued.

standard; → temperature; → pressure.

static pressure
  فشار ِ ایستا   
fešâr-e istâ

Fr.: pression statique   

In → fluid mechanics, the → pressure felt by an object suspended in a → fluid and moving with it. This pressure is called static because the object is not moving relative to the fluid. See also → dynamic pressure.

static; → pressure.

thermal pressure
  فشار ِ گرمایی   
fešâr-e garmâyi (#)

Fr.: pression thermale   

The ordinary pressure in a gas that is due to motions of particles and can be attributed to the object's → temperature.

thermal; → pressure.

total pressure
  فشار ِ هماک   
fešâr-e hamâk

Fr.: pression totale   

The sum of → static pressure, → dynamic pressure, and → hydrostatic pressure in the → Bernoulli equation.

total, → pressure.

velocity pressure
  فشار ِ توانیک   
fešâr-e tavânik

Fr.: pression dynamique   

dynamic pressure.

velocity; → pressure.

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