The Pascal (Pa) is the unit of pressure in the International System of Units (SI). One Pascal is equivalent to the pressure exerted by a force of one newton over an area of one square meter:
1 Pa = 1 N/m2
How does it work?
Pressure is the distribution of force acting on a surface. For example:
- If an object exerts a force of 1 newton over an area of 1 square meter, the pressure will be 1 Pascal.
- A everyday example: atmospheric pressure at sea level is approximately 101,325 Pascals (101.3 kPa).
What is it used for?
- Physics and engineering: To study the strength, stress, and pressure resistance of materials.
- Meteorology: To measure atmospheric pressure, for example in millibars (1 mbar = 100 Pa).
- Industrial applications: In pressure measuring systems, such as hydraulic machines or to analyze the operation of pumps.
Further information
- 1 kilopascal (kPa) = 1,000 Pa.
- 1 bar = 100,000 Pa.
- 1 psi (pound per square inch) ≈ 6,894.76 Pa.
Important to know!
The Pascal is named after Blaise Pascal, who laid the foundations for the physics of pressure. The unit's significance lies in the precise measurement of pressure, material elasticity, and fluid behavior.