Pressure Gauge: Barometer definitions Flashcards
Pressure Gauge: Barometer definitions
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Barometer A device that measures atmospheric pressure using a liquid column in a tube. Atmospheric Pressure The force exerted by the weight of the air above a surface. Mercury A dense liquid metal used in barometers for its high density, allowing compact design. Density Mass per unit volume of a substance, crucial for calculating pressure in barometers. Vacuum A space devoid of matter, creating zero pressure in barometer tubes. Gravitational Acceleration The acceleration due to gravity, approximately 9.8 m/s² on Earth, used in pressure calculations. Column Height The height of the liquid in a barometer, indicating atmospheric pressure. Pascals The SI unit of pressure, equivalent to one newton per square meter. Standard Atmospheric Pressure The average pressure at sea level, approximately 101,325 Pascals or 1 atmosphere. Pressure Gauge An instrument for measuring the pressure of a fluid or gas. Ambient Air The air surrounding a particular environment, affecting barometer readings. Porricelli Inventor associated with the classic mercury barometer design. Liquid Column The vertical section of liquid in a barometer, used to measure pressure. 1 Atmosphere A unit of pressure defined as 101,325 Pascals, standard at sea level. Pressure Equation P_air = rho * g * h, used to calculate atmospheric pressure in barometers.