Pressure
Pressure (symbol: p or P) is the force applied perpendicular to the surface of an object per unit area over which that force is distributed. Gauge pressure (also spelled gage pressure) is the pressure relative to the ambient pressure.
Various units are used to express pressure. Some of these derive from a unit of force divided by a unit of area; the SI unit of pressure, the pascal (Pa), for example, is one newton per square metre; similarly, the pound-force per square inch (psi) is the traditional unit of pressure in the imperial and US customary systems. Pressure may also be expressed in terms of standard atmospheric pressure; the atmosphere (atm) is equal to this pressure and the torr is defined as 1⁄760 of this. Manometric units such as the centimetre of water, millimetre of mercury and inch of mercury are used to express pressures in terms of the height of column of a particular fluid in a manometer.
Definition
Pressure is the amount of force acting per unit area. The symbol for pressure is p or P. The IUPAC recommendation for pressure is a lower-case p. However, upper-case P is widely used. The usage of P vs p depends on the field in which one is working, on the nearby presence of other symbols for quantities such as power and momentum, and on writing style.
Pressure (disambiguation)
Pressure is an effect which occurs when a force is applied on a surface.
Pressure also may refer to:
Music
Entertainment
Other uses
See also
Pressure (Sunscreem song)
"Pressure" is a 1991 dance single recorded by the British techno group Sunscreem, and written and produced by band members Paul Carnell and lead singer Lucia Holm from the act's 1993 set *O3. "Pressure" was the group's first single release in the United Kingdom, where it peaked at number 60 on the country's pop chart, but it became a major club hit in the United States in wake of the success of "Love U More", where it was released as "Pressure US" with a new remixed version and went to number one on the dance chart for one week in June 1993, their second of three number ones. The re-released version reentered the UK charts afterwards, peaking at number 19 in 1993.
Track listing
See also
Meo (ethnic group)
Meo (pronounced May-o & Mev) (also called Mewati) is a Muslim Rajput from North-Western India, particularly in and around Mewat that includes Mewat district of Haryana and parts of adjacent Alwar and Bharatpur districts in Rajasthan. Meos speak Mewati, a language of the Indo-Aryan language family.
History and origin
Meos are inhabitants of Mewat, a region that consists of Mewat district of Haryana and some parts of adjoining Alwar and Bharatpur districts of Rajasthan and western Uttar Pradesh, where the Meos have lived for a millennium. They were Hindu Rajputs who converted to Islam between 12th and 17th century, until as late as Aurangzeb's rule but they have maintained their age-old distinctive cultural identity until today. They have shared this region with a number of other Muslim Rajput communities, such as Khanzada, Qaimkhani and Malkana.
Hindu origins
The Meo represent a blending of Hinduism and Islam. Meo profess the beliefs of Islam but the roots of their ethnic structure are in Hindu caste society. The neighbouring Hindu Jats, Minas, Ahirs and Rajputs share the same mores. According to some sources, the Meo community may have a common origin with the Meena community.
MEO (Portugal)
MEO is a mobile and fixed telecommunications service and brand from Portugal Telecom, managed by MEO - Serviços de Comunicações e Multimédia. The service was piloted in Lisbon in 2006 and was later extended to Porto and Castelo Branco.
History
The commercial launch of the ADSL2+ service took place in June 2007. The satellite service began in April 2008, using the Hispasat satellite, soon followed by the FTTH service. The ADSL2+ and FTTH offers reached across Portugal and included broadband Internet services (at up to 400Mbit/s) as well as a telephone service.
MEO was officially founded after the separation of PT Comunicações and PT Multimédia (later ZON Multimédia). While PT Multimédia employed coaxial cables, after separation, MEO started making use of copper cables. The television service supplied by MEO within the copper cable network is served on the ADSL line.
In May 2009 PT Comunicações announced, after Terrestrial Digital Television (TDT) transmissions had started, that the triple play service was also available with fiber optic speeds can achieve 400 Mbits/s.
5-MeO-DMT
5-MeO-DMT (5-methoxy-N,N-dimethyltryptamine) is a powerful psychedelic tryptamine. It is found in a wide variety of plant species, and a single psychoactive toad species. Like its close relatives DMT and bufotenin (5-HO-DMT), it has been used as an entheogen by South American shamans for thousands of years.
Chemistry
5-MeO-DMT was first synthesized in 1936, and in 1959 it was isolated as one of the psychoactive ingredients of Anadenanthera peregrina seeds used in preparing Yopo snuff. It was once believed to be a major component of the psychoactive effects of the snuff, although this has recently been shown to be unlikely, due to the limited—sometimes nonexistent—quantity contained within the seeds of this plant, which instead achieve their psychoactivity due to the bufotenin that they contain. It occurs in many organisms that contain bufotenin (5-HO-DMT), and is the O-methyl analogue of that compound. It is metabolized mainly by CYP2D6.
History
Traditionally 5-MeO-DMT has been used in psychedelic snuff made from virola bark resin, and may be a trace constituent of ayahuasca when plants such as Diplopterys cabrerana are used as an admixture. 5-MeO-DMT is also found in the venom of the Colorado River toad (Incilius alvarius [= Bufo alvarius]), although there was no direct evidence this was used as a hallucinogen until recent times.
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