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Atmospheric pressure, also known as air pressure or barometric pressure (after the barometer), is the pressure within the atmosphere of Earth. The standard atmosphere (symbol: atm) is a unit of pressure defined as 101,325 Pa (1,013.25 hPa ), which is equivalent to 1,013.25 millibars , [ 1 ] 760 mm Hg , 29.9212 inches Hg , or 14.696 psi . [ 2 ]
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When atmospheric pressure is measured by a barometer, the pressure is also referred to as the "barometric pressure". Assume a barometer with a cross-sectional area A, a height h, filled with mercury from the bottom at Point B to the top at Point C. The pressure at the bottom of the barometer, Point B, is equal to the atmospheric pressure.
Pressure as a function of the height above the sea level. There are two equations for computing pressure as a function of height. The first equation is applicable to the atmospheric layers in which the temperature is assumed to vary with altitude at a non null lapse rate of : = [,, ()] ′, The second equation is applicable to the atmospheric layers in which the temperature is assumed not to ...
Originally, many thước of varying lengths were in use in Vietnam, each used for different purposes. According to Hoàng Phê (1988), [1] the traditional system of units had at least two thước of different lengths before 1890, [2] the thước ta (lit. "our ruler") or thước mộc ("wooden ruler"), equal to 0.425 metres (1 ft 4.7 in), and the thước đo vải ("ruler for measuring ...
Later that day, the JMA had analysed that the tropical depression had reached its maximum intensity with a minimum barometric pressure of 1004 hPa (29.65 inHg). [5] Just before November 5, the JTWC issued a Tropical Cyclone Formation Alert (TCFA), while located atop of warm waters with temperatures of approximately 29 °C (84.2 °F). [6]
The following month, the bureau forced the site to cease operations, fined its owner 25 million VND, and proposed that the Vietnam Internet Network Information Center revoke its vietbao.vn domain name. [2] However, Việt Báo resumed operations shortly after under a different owner, continuing to republish other sites' content. [3]
Việt Báo was founded in 1992 by two former South Vietnamese writers, novelist Nhã Ca and poet Trần Dạ Từ. It was originally titled Việt Báo Kinh Tế (Vietnamese Economic News) and based in Westminster, California. It published weekly until 1995, when it began publishing daily.