Which type of pressure is caused by the weight of the earth's atmosphere?

Atmospheric pressure refers to the pressure exerted by the weight of the Earth's atmosphere at a given point. It is the force per unit area that results from the cumulative weight of air molecules above that point in the atmosphere. As elevation increases, atmospheric pressure decreases because there is less air above to exert pressure, making this type of pressure highly variable depending on altitude and weather conditions.

Understanding atmospheric pressure is crucial in various engineering applications, especially in power engineering, as it affects fluid behaviors, boiler operations, and other equipment that rely on the principles of pressure and flow.

In contrast, absolute pressure measures the total pressure exerted on a system, including atmospheric pressure, while standard pressure tends to refer to a reference value used for calculations under defined conditions. Minimum pressure is not commonly recognized in the context of atmospheric pressures in power engineering.