In which unit can the weight of the atmosphere be measured?

The weight of the atmosphere is commonly measured in units that express pressure, such as PSI (pounds per square inch), mmHg (millimeters of mercury), and inHg (inches of mercury). These units indicate the force exerted by the atmospheric column above a given area.

When atmospheric pressure is measured using those units, it provides a clear understanding of how much air is above a specific point, allowing for calculations related to altitude, weather patterns, and aircraft performance.

Other options, while relevant in different contexts, do not specifically measure atmospheric weight as pressure. Kilograms measure mass rather than pressure, pascals are another unit of pressure but are not commonly used in general discussion about atmospheric weight compared to the other pressure units, and bars, like pascals, are used for measuring pressure but may not be as familiar as psi, mmHg, and inHg in everyday atmospheric discussions. Therefore, the atmospheric weight is best represented using PSI, mmHg, and inHg as they directly relate to pressure measurements.