- published: 30 Oct 2015
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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.
Dub or dubbing may refer to:
Jah Jah, also known as MC Jah Jah, is the professional name of Janine Gordon, a white, female rapper, photographer and multimedia artist from Brooklyn, New York.
Jah Jah got her start in rap by becoming acquainted with many people involved in the Brooklyn, underground hip hop scene during the '90s. It was here that she met many other artists such as Redman, Chubb Rock, and The Beatnuts."I was so encouraged meeting Redman and The Beatnuts, Redman called me out in his song back in 97, 'Jah Jah I go Ca Ca,' so I have these people, people encouraging me," stated the rapper in an interview. She has a very wide fan base on Myspace and has experienced some success with her music overseas in Brazil. Jah Jah was able to remain within the top 10 artists for over a year on the Myspace music chart.
In 2005, Jah Jah filed a copyright infringement lawsuit against 50 Cent and Dr. Dre for allegedly stealing her music and using it illegally for 50's Massacre album.
Jah Jah has art, notably photography that has appeared in magazines such as Arena and galleries in New York, San Francisco,Europe and Brazil. Her visual art work is credited under her real name, Janine Gordon. She also has a Master's Degree in Fine Art from New York University.