Fluids Pressure and Pascals Principle

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  Fluids: Pressure and Pascal’s Principle  Objectives  To explain the pressure-depth relationship.  State Pascal’s principle and describe how it is used in practical applications.  What is Pressure? Pressure is a scalar quantity, even though the force producing it or the force produced within a fluid by a pressure does have direction and so is a vector. Pressure has SI units of N/m 2 . This combined unit is given as Pascal (Pa). In British system it is lb/in 2 , or psi. Pressure is a force applied over an area.  The equation is understood to be acting normally (perpendicularly) to the surface area. What is Pressure?  AFcos Ө F  ┴  Ө FF may be the perpendicular component of a force that acts at an angle to the surface.
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