The Unicode computer character set has dedicated symbols Template:Unicode ( Template:U+) for Pa and Template:Unicode ( Template:U+) for kPa, but these exist merely for backward-compatibility with some older ideographic character-sets and are therefore deprecated. The same definition is used in the compressor and the pneumatic tool industries (ISO 2787). In 1985 the IUPAC recommended that the standard for atmospheric pressure should be harmonized to 100,000 Pa = 1 bar = 750 Torr. This definition is used for pneumatic fluid power (ISO R554), and in the aerospace (ISO 2533) and petroleum (ISO 5024) industries. Standard atmospheric pressure is 101325 Pa The name pascal was adopted for the SI unit newton per square metre by the 14th CGPM in 1971. The unit is named after Blaise Pascal, the eminent French mathematician, physicist, and philosopher noted for his experiments with a barometer, an instrument to measure air pressure. Where N is the newton, m is the metre, kg is the kilogram, and s is the second. The pascal can be expressed using SI derived units, or alternatively solely SI base units, as: The corresponding Imperial unit is pounds per square inch (psi). One hectopascal is equivalent to one millibar one standard atmosphere is exactly equal to 101.325 kPa or 1013.25 hPa or 101,325 Pa. One hectopascal corresponds to about 0.1% of atmospheric pressure slightly above sea level one kilopascal is about 1% of atmospheric pressure. In other contexts, the kilopascal is commonly used, for example on bicycle tire labels. In everyday life the pascal is perhaps best known from meteorological barometric pressure reports, where it occurs in the form of hectopascals On Earth, standard atmospheric pressure is 101,325 Pa. It is a measure of force per unit area, defined as one newton per square metre. The pascal (symbol: Pa) is the SI derived unit of pressure, internal pressure, stress, Young's modulus and tensile strength, named after the French mathematician, physicist, inventor, writer, and philosopher Blaise Pascal. Template:Use dmy dates Template:Refimprove Template:Infobox Unit
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |