height of a liquid column
11Barometer — Schematic drawing of a simple mercury barometer with vertical mercury column and reservoir at base …
12Vacuum — This article is about empty physical space or the absence of matter. For other uses, see Vacuum (disambiguation). Free space redirects here. For other uses, see Free space (disambiguation). Pump to demonstrate vacuum In everyday usage, vacuum is… …
13Capillary action — Capillary action, capillarity, capillary motion, or wicking is the ability of a substance to draw another substance into it. The standard reference is to a tube in plants but can be seen readily with porous paper. It occurs when the adhesive… …
14Toilet — This article is about a sanitation fixture used primarily for the disposal of human excrement. For a room containing a toilet, see toilet (room). For other uses, see toilet (disambiguation) …
15Atmospheric pressure — Air pressure redirects here. For the pressure of air in other systems, see pressure. Atmospheric pressure is the force per unit area exerted against a surface by the weight of air above that surface in the Earth s atmosphere. In most… …
16Tuned mass damper — An animation showing the movement of a skyscraper versus the mass damper. The green indicates the hydraulic cylinders used to damp the motion of the skyscraper. A tuned mass damper, also known as an active mass damper (AMD) or harmonic absorber,… …
17Torr — For the standard botanical author abbreviation Torr., see John Torrey. The torr (symbol: Torr) is a non SI unit of pressure with the ratio of 1 to 760 standard atmosphere, chosen to be roughly equal to the fluid pressure exerted by a millimetre… …
18Comcast Center (office building) — Infobox Skyscraper building name = Comcast Center location = 1701 John F. Kennedy Blvd, Philadelphia, Pennsylvania, USA status = use = Office roof = ft to m|975|abbr=yes top floor = floor count = 57 groundbreaking = January 2005 constructed =… …
19Comcast Center (Philadelphia) — Comcast Center Former names One Pennsylvania Plaza General information Type Commercial offices …
20inch of mercury — (in Hg) a traditional unit of atmospheric pressure. In the United States, atmospheric pressure is customarily expressed as the height of a column of mercury exerting the same pressure as the atmosphere. When a traditional mercury barometer is… …
