压强单位换算(国外英文资料).docVIP

压强单位换算(国外英文资料) 1 bar = 10 ^ 5 Pa = 0.1 MPa 1 mpa = 10.19 KGF/cm ^ 2 The vacuum units commonly used are Pa, Kpa, Mpa, atmospheric pressure, kilogram (Kgf/cm2), mmHg, mbar, bar, PSI, etc. The approximate conversion relationship is as follows: 1 mpa = 1000 kpa 1 kpa = 1000 pa 1 atmosphere = 100KPa = 0.1 MPa 1 atmosphere = 1 kilogram (Kgf/cm2) = 760mmHg 1 = 14.5 PSI in the pressure of the atmosphere 1 kpa = 10 mbar 1 bar = 1000 mbar [background] Basic concept Pressure P: the pressure on the area of an object is called pressure. Pressure F: the force on the surface of an object, unit: N. Pressure international units: cow/m ^ 2; Special name: PASCAL (Pa) Formula: F = PS (S: stress area, the public portion of the two objects contact; unit: m ^ 2.) Its the internal pressure of the liquid Measuring the internal pressure of the liquid: use the liquid pressure gauge (U type tube pressure meter) Cause: because the liquid has gravity, the pressure on the bottom of the container; Because of the liquid liquidity, the pressure on the wall of the wall. Rule: the pressure is equal in all directions at the same depth. The greater the depth, the greater the pressure; The liquid is dense at the same depth as the liquid, and the pressure is high. (depth h, liquid to the vertical height of a point in the liquid.) Formula: P = rho gh h. Rho: kilogram over meter 3; G is equal to 9.8 newtons per kilogram. Atmospheric pressure Atmospheric pressure by gravity, prove the existence of atmospheric pressure and its great fort mudd hemispheres experiment, the determination of atmospheric pressure value is torricelli (Italian scientists). After the torricelli tube was tilted, the mercury column was unchanged and lengthened. 1 standard atmosphere = 76cm mercury column height = 1.01 x 105 pa = 10.336 meters high water column height Instrument for measuring atmospheric pressure: pressure gauge (mercury barometer, box barometer). Atmospheric pressure varies with height: the higher the elevation, the low