What is Atmospheric Pressure? Definition, Formula, and Examples

Atmospheric pressure is the force exerted by the weight of air in the Earth’s atmosphere. Measured in units like pascals or atmospheres, it affects weather patterns, human health, and scientific measurements.

Understanding Atmospheric Pressure Definition

The atmospheric pressure definition refers to the pressure caused by the air above any given point. It decreases with altitude and varies with weather conditions.

Formula and Calculation

The standard formula is P = ρgh, where P is pressure, ρ is air density, g is gravity, and h is height. At sea level, it averages 1013.25 hPa.

Real-World Examples

Weather systems use pressure changes: low pressure often brings storms, while high pressure indicates clear skies. Altitude sickness occurs due to lower pressure at high elevations.

FAQ Section

How is atmospheric pressure measured?
It’s measured with barometers, commonly using mercury or aneroid systems.

Why does pressure change with weather?
Temperature and humidity variations alter air density, impacting pressure readings.

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