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La pulgada de mercurio, inHg, o "Hg" es una unidad de medida de presión, ampliamente utilizada para determinar la Presión sanguínea. Fuera del ámbito sanitario, en los Estados Unidos se usa también para determinar la presión atmosférica en informaciones meteorológicas y por la aviación de los Estados Unidos .
Inch of mercury (inHg and ″Hg) is a non-SI unit of measurement for pressure. It is used for barometric pressure in weather reports, refrigeration and aviation in the United States. It is the pressure exerted by a column of mercury 1 inch (25.4 mm) in height at the standard acceleration of gravity.
La pulgada de mercurio, inHg, o "Hg" es una unidad de medida de presión, ampliamente utilizada para determinar la Presión sanguínea. Fuera del ámbito sanitario, en los Estados Unidos se usa también para determinar la presión atmosférica en informaciones meteorológicas y por la aviación de los Estados Unidos.
It is the amount of pressure that a column of mercury that is one inch tall has at 0 °C at the standard acceleration of gravity, or how fast things speed up as they are falling because of gravity . 1 inHg at 0 °C = 3,386.389 Pa. Categories: Units of pressure.
- Mechanism
- Mean Sea-Level Pressure
- Surface Pressure
- Altitude Variation
- Local Variation
- Records
- Measurement Based on The Depth of Water
- Boiling Point of Liquids
- Measurement and Maps
- External Links
Atmospheric pressure is caused by the gravitational attraction of the planet on the atmospheric gases above the surface and is a function of the mass of the planet, the radius of the surface, and the amount and composition of the gases and their vertical distribution in the atmosphere.It is modified by the planetary rotation and local effects such ...
The mean sea-level pressure (MSLP) is the atmospheric pressure at mean sea level. This is the atmospheric pressure normally given in weather reports on radio, television, and newspapers or on the Internet. The altimeter settingin aviation is an atmospheric pressure adjustment. Average sea-level pressure is 1,013.25 hPa (29.921 inHg; 760.00 mmHg). I...
Surface pressure is the atmospheric pressure at a location on Earth's surface (terrain and oceans). It is directly proportional to the massof air over that location. For numerical reasons, atmospheric models such as general circulation models (GCMs) usually predict the nondimensional logarithm of surface pressure. The average value of surface press...
Pressure on Earth varies with the altitude of the surface, so air pressure on mountains is usually lower than air pressure at sea level. Pressure varies smoothly from the Earth's surface to the top of the mesosphere. Although the pressure changes with the weather, NASA has averaged the conditions for all parts of the earth year-round. As altitude i...
Atmospheric pressure varies widely on Earth, and these changes are important in studying weather and climate. Atmospheric pressure shows a diurnal or semidiurnal (twice-daily) cycle caused by global atmospheric tides. This effect is strongest in tropical zones, with an amplitude of a few hectopascals, and almost zero in polar areas. These variation...
The highest adjusted-to-sea level barometric pressure ever recorded on Earth (above 750 meters) was 1,084.8 hPa (32.03 inHg) measured in Tosontsengel, Mongolia on 19 December 2001. The highest adjusted-to-sea level barometric pressure ever recorded (below 750 meters) was at Agata in Evenk Autonomous Okrug, Russia (66°53'N, 93°28'E, elevation: 261 m...
One atmosphere (101.325 kPa or 14.7 psi) is also the pressure caused by the weight of a column of freshwater of approximately 10.3 m (33.8 ft). Thus, a diver 10.3 m underwater experiences a pressure of about 2 atmospheres (1 atm of air plus 1 atm of water). Conversely, 10.3 m is the maximum height to which water can be raised using suctionunder sta...
Pure water boils at 100 °C (212 °F) at earth's standard atmospheric pressure. The boiling point is the temperature at which the vapour pressure is equal to the atmospheric pressure around the liquid. Because of this, the boiling point of liquids is lower at lower pressure and higher at higher pressure. Cooking at high elevations, therefore, require...
An important application of the knowledge that atmospheric pressure varies directly with altitude was in determining the height of hills and mountains, thanks to reliable pressure measurement devices. In 1774, Maskelyne was confirming Newton's theory of gravitation at and on Schiehallion mountain in Scotland, and he needed to measure elevations on ...
Pulgada de columna de agua. La Pulgada de columna de agua ( inAq, o inH2O según la nomenclatura estadounidense) es una unidad de presión que no es parte del SI. Las unidades se usan convencionalmente para medir ciertos diferenciales de presión, como pequeñas diferencias de presión a través de un orificio, o en una tubería o ...
Standard pressure, the baseline used universally, is 1013.25 hectopascals (hPa), which is equivalent to 1013.25 mb or 29.92 inches of mercury (inHg). This setting is equivalent to the atmospheric pressure at mean sea level (MSL) in the ISA.
