What are the common units used to measure atmospheric pressure?

Atmospheric pressure is primarily measured using units that directly relate to force exerted over an area. The most common units for this measurement include pounds per square inch (psi), which is commonly used in the United States, and inches of mercury (inHg) and millimeters of mercury (mmHg), both of which are derived from the height of mercury in a column as a result of atmospheric pressure.

These units are crucial in various fields, including aviation and meteorology, as they help in understanding the effects of pressure changes on flight dynamics and weather patterns. In atmospheric science, particularly, these units provide a standard way of expressing pressure that can easily be understood and applied in practical scenarios such as altitude calculations and assessing weather conditions.

The other options suggest units used in different contexts unrelated to atmospheric pressure measurement. For example, the first choice includes electrical units, while the third mentions temperature measurements, and the fourth refers to volume and mass, which do not pertain to pressure. Thus, the second option accurately represents the common units used specifically for measuring atmospheric pressure.