Final answer:
Barometric Pressure (Air Pressure) is commonly measured in Pascals (b), and the pascal is the standard unit for measuring pressure, equivalent to one newton per square meter.
Step-by-step explanation:
Barometric Pressure (Air Pressure) is typically measured in Pascals (b). Pressure is a physical quantity representing the presence of a force applied to a surface. In the context of air pressure or barometric pressure, it quantifies the force that the atmosphere exerts over a certain area. The unit for measuring this pressure is the pascal (Pa), which is equivalent to one newton per square meter. Other common units for measuring pressure include torr, atmospheres (atm), and kilopascals (kPa). At sea level, standard atmospheric pressure is about 101 kPa, which is also expressed as 760 mmHg (millimeters of mercury) or 14.7 lb/in² (psi). A barometer is the instrument typically used to measure atmospheric pressure, and this can be done through various methods, including the height of the mercury column in a Torricelli barometer.