Meteorologists and weather reporters worldwide often use this unit for convenience, since working in pascals would result in much larger values.ġ5 psi = 15 × 0.0689475729 bar = 1. Millibars (symbol: mb) are also commonly used when referencing atmospheric air pressure, where atmospheric pressure equals 1013.25 mbar (101.325 kPa). The International Bureau of Weights and Measures has specified the bar as a unit that authors should have the freedom to use but has chosen not to include the bar in the list of non-SI units accepted for use with SI.
The term "bar" comes from the Greek word "baros," which means weight.Ĭurrent use: Although the bar is a metric unit of pressure, it is not accepted within the International System of Units (SI) and is even deprecated within certain fields. History/origin: The unit, bar, was introduced by Vilhelm Bjerknes, a Norwegian meteorologist who founded modern weather forecasting. It is equal to 0.987 atmospheres (101,325 Pa), the unit often used as a reference of standard pressure. Barĭefinition: A bar (symbol: bar) is a metric unit of pressure that is defined as exactly 100,000 pascals (symbol: Pa). Although the pascal is more widely used in scientific contexts, psi is more often used in everyday contexts, particularly in countries like the United States as well as others under the US customary or imperial systems of units. As such, the prototype pound at the time was known as the avoirdupois wool pound.Ĭurrent use: The psi is fairly widely used to measure numerous pressures, such as tire pressure, scuba tank pressure, natural gas pipeline pressure, among others. The system is believed to have come into use in England around 1300 and was used in the international wool trade. Psi Chis symbol is based on the Greek letters psi and chi, which have been used for decades in the Psi Chi induction ritual to express the Greek words. It is based on the avoirdupois system, a system that uses weights in terms of the avoirdupois pound, which was standardized in 1959.
#Psi symbol free#
History/origin: Pound-force per square inch is a unit that originated in the imperial and US customary systems of units. Buy Psychology Psi Symbol Greek Letter Psi Graphic T-Shirt: Shop top fashion brands T-Shirts at FREE DELIVERY and Returns possible on eligible. One psi is approximately 6,895 pascals (N/m 2). It is defined as the pressure that results when a force of one pound-force is applied to a one-square-inch area. Ounce per square inch -> inch of water 4☌ or 39.Definition: A pound-force per square inch (symbol: psi) is an imperial and US customary unit of pressure based on avoirdupois units.Get special offers & fast delivery options with every purchase on Ubuy. Millitorrs -> pound force per square millimeter Buy Psychology Symbol Pin (Psi Symbol pin) online at an affordable price.Millitorrs -> pound force per square inch.
Millitorrs -> foot of water 15.5☌ or 60☏.Random PRESSURE units poundal per square yard millimeter of water kilopascals foot of mercury dyne per square foot meganewton per square feet pound force per square millimeter foot of water atmosphere at technical meter of air 15☌ (Millitorrs) to (Psi) conversions In English, the letter is pronounced /sa/. History/origin: Pound-force per square inch is a unit that originated in the imperial and US customary systems of units. One psi is approximately 6,895 pascals (N/m 2 ). To enter Psi in Microsoft Word you can use keyboard short-cuts, for example the lower-case of psi is alt + numpad 968 and the upper-case is alt + numpad 936. = 1.3157894892672E-6 atmosphere atm standard (atm) For Greek loanwords in Latin and modern languages with Latin alphabets, psi is usually transliterated as ps. Definition: A pound-force per square inch (symbol: psi) is an imperial and US customary unit of pressure based on avoirdupois units.
In relation to the base unit of => (pascals), 1 Millitorrs (mTorr) is equal to 0.13332237 pascals, while 1 Psi (psi) = 6894.7572932 pascals. Initially, this twenty-third letter of the Greek alphabet had ended up being transliterated by the Romans to form the word psyche, which meant butterfly. The evolution of the term 'psi' () has a certain originality.
In both Classical and Modern Greek, the letter indicates the combination /ps/ (as in English word lapse). The history of the symbol of psychology () The history of the symbol of psychology contains something mythological. In the system of Greek numerals it has a numeric value of 700.
#Psi symbol how to#
How to convert Millitorrs to Psi (mTorr to psi)?ġ x 1.9336774933541E-5 psi = 1.9336774933541E-5 Psi.Īlways check the results rounding errors may occur. Psi (, ) is the 23rd letter of the Greek alphabet. The base unit for pressure is pascals (Non-SI Unit)
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