FAA Aviation Physics Practice Test

The Pascal is the SI unit of pressure, which is defined as one newton per square meter. This unit is named after Blaise Pascal, a French mathematician, physicist, and inventor. Pressure, in scientific terms, is the force applied perpendicular to the surface of an object per unit area. Therefore, when calculating pressure, the unit of force (newtons) is divided by the unit of area (square meters), resulting in pascals. Using the Pascal as the standard measure allows for consistency in scientific communication and applications, especially in fields like physics and engineering. It is widely used in various scientific contexts, including meteorology, oceanography, and fluid mechanics. Other units of pressure, such as bar, pound per square inch, or atmospheres, can be converted to pascals but are not the standardized unit of measure within the International System of Units (SI).