# An Etymological Dictionary of Astronomy and AstrophysicsEnglish-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 sedâFr.: 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 nâravâniFr.: 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 estândéFr.: 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 istâFr.: 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 hamâkFr.: pression totale   The sum of → static pressure, → dynamic pressure, and → hydrostatic pressure in the → Bernoulli equation.→ total, → pressure. velocity pressure   فشار ِ توانیک   fešâr-e tavânikFr.: pression dynamique   → velocity; → pressure.

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