- published: 09 Sep 2008
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Pressure (the symbol: p) is the force per unit area applied in a direction perpendicular to the surface of an object. Gauge pressure (also spelled gage pressure) is the pressure relative to the local atmospheric or ambient pressure.
Pressure is the effect of a force applied to a surface. Pressure is the amount of force acting per unit area. The symbol of pressure is p.
Mathematically:
where:
Pressure is a scalar quantity. It relates the vector surface element (a vector normal to the surface) with the normal force acting on it. The pressure is the scalar proportionality constant that relates the two normal vectors:
The minus sign comes from the fact that the force is considered towards the surface element, while the normal vector points outward.
It is incorrect (although rather usual) to say "the pressure is directed in such or such direction". The pressure, as a scalar, has no direction. It is the force given by the previous relationship to the quantity that has a direction, not the pressure. If we change the orientation of the surface element, the direction of the normal force changes accordingly, but the pressure remains the same.
William Martin "Billy" Joel (born May 9, 1949) is an American pianist, singer-songwriter, and composer. Since releasing his first hit song, "Piano Man," in 1973, Joel has become the sixth best-selling recording artist and the third best-selling solo artist in the United States, according to the RIAA.
Joel had Top 40 hits in the 1970s, 1980s, and 1990s, achieving 33 Top 40 hits in the United States, all of which he wrote himself. He is also a six-time Grammy Award winner, a 23-time Grammy nominee and has sold over 150 million records worldwide. He was inducted into the Songwriter's Hall of Fame (1992), the Rock and Roll Hall of Fame (1999), the Long Island Music Hall of Fame (2006), and the Hit Parade Hall of Fame (2009). In 2008, Billboard magazine released a list of the Hot 100 All-Time Top Artists to celebrate the US singles chart's 50th anniversary, with Billy Joel positioned at No. 23. With the exception of the 2007 songs "All My Life" and "Christmas in Fallujah," Joel stopped recording pop/rock material after 1993's River of Dreams, but he continued to tour extensively until 2010.
Justin Drew Bieber ( /ˈbiːbər/ BEE-bər, born March 1, 1994) is a Canadian Pop/R&B singer-songwriter, musician, and actor. Bieber was discovered in 2008 by Scooter Braun, who came across Bieber's videos on YouTube and later became his manager. Braun arranged for him to meet with Usher in Atlanta, Georgia, and Bieber was soon signed to Raymond Braun Media Group (RBMG), a joint venture between Braun and Usher, and then to a recording contract with Island Records offered by L.A. Reid. Bieber's debut single, "One Time", was released in 2009 and peaked in the top twenty in Canada and charted in the top thirty in several international markets. His debut album, the seven-track EP My World, followed in November 2009, and was soon certified platinum in the United States. He became the first artist to have seven songs from a debut album chart on the Billboard Hot 100.
Actors: Ben Talar (director), Ben Talar (writer), Ben Talar (producer), Ben Talar (editor), Jakub Póltorak (producer), Jacek Kalucki (actor), Jakub Póltorak (actor), Jakub Póltorak (writer), Jakub Póltorak (costume designer), Jakub Póltorak (director), Adam Szyszkowski (actor), Magdalena Waligórska (actress), Dariusz Bronowicki (actor), Jacek Pieniazek (actor), Paulina Zgoda (actress),
Plot: A story about a seasoned hitman who wants to return to the path of virtue. Messing up a job with a mob accountant he decides to carry out his boss's last order. During his mission, offering valuable help and advice as his spiritual guide, is Chuck Norris.
Keywords: chuck-norris, guardian-angel, latino, mafia, mobActors: David Michael Frank (composer), David Strathairn (actor), Stephen McHattie (actor), Steve Buscemi (actor), Olek Krupa (actor), Patti D'Arbanville (actress), Steven Reuther (producer), John Seitz (actor), Daniel Strol (miscellaneous crew), George Gerdes (actor), Tony Trimarco (miscellaneous crew), Patricia Charbonneau (actress), Boyd Gaines (actor), Mitchell Cannold (producer), Mary Kane (producer),
Plot: A journalist (Anna) receives an obscene phonecall that she mistakes for her boyfriend. She then agrees to meet with the caller at a bar, but instead of meeting the boyfriend, she witnesses a murder.
Keywords: anger, anonymous-telephone-call, bare-breasts, breast-suckling, corrupt-cop, death, disappointment, drug-deal, drug-dealing, eroticaPressure pressure I got pressure, oh yeah, oh yeah, oh yeah
Pressure pressure I got pressure, oh yeah
I don't really want to give it to you
'Cos it's really contagious
You can pick it up anywhere
And it can be quite dangerous
You can spread it mouth to mouth
You can even get it when you're alone
But I can always live with it
Whenever I am close to you
Pressure pressure I got pressure, oh yeah, oh yeah, oh yeah
Pressure pressure I got pressure
I get it driving in my motor car
I get it when I'm drinking in a bar
I get it riding on the subway
I get it regular every day
And anyone who never had it yet
And doesn't know what I'm going through
But I forget the pressure
When I am close to you
Altogether now-Oh yeah, oh yeah, oh yeah
Oh yeah, oh yeah, oh yeah
Pressure pressure I got pressure Oh yeah. oh yeah. oh yeah
Pressure pressure FEEL THE PRESSURE
You got the pressure and that's a fact
I can tell by the way you act
And I can tell that you're pressurised
By the look that's in your eyes
I know the pressure 'cos I've got it too
So I know what you're going through
But I forget the pressure