Pascal
Pascal is a unit used to measure internal pressure, mechanical stress, Young's modulus and tensile strength. It is defined as one newton per square meter.
September 5, 2017
In everyday life we find many examples of pressure we often use: atmospheric pressure to talk about time changes, blood pressure to talk about health, pressure of the car's wheels in the engine field. We even talk about pressure on issues that have no link with physics: the pressure of a job interview.
Force and pressure are very different concepts. The pressure (symbol P) is the physical quantity that measures the instantaneous force in a unit of surface, applied in a direction perpendicular to it. Its unity in the SI is the Pascal. Pascal is equivalent to one Newton per square meter (N / m2). Other units can also be used to measure pressure such as mercury millimeter, bar and atmosphere.
The pressure can be expressed in terms of absolute pressure or relative pressure (also called normal pressure, gauge pressure or gauge pressure). The absolute pressure is the sum of the relative pressure and the atmospheric pressure. The standard atmospheric pressure is 101,325 Pa.
The pressure P indicates, for a given instant, the normal value of the force F at each point of a surface S.
The unit of the international system for force is the Newton (N), for the surface is the square meter (m2), so, for the pressure will be the (N / m2). To this value, since it is used usually has been given a special name, Pascal (Pa), in honor to Blaise Pascal.
Pascal (Pa) is the unit of measurement of pressure in the International System. But it is a small unit, and other units of pressure measurement may sometimes be used:
Among the different pressure measuring devices we find:
Pascal is a unit used to measure internal pressure, mechanical stress, Young's modulus and tensile strength. It is defined as one newton per square meter.
September 5, 2017
Last review: November 15, 2016