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Kensico Reservoir

(Encyclopedia)Kensico Reservoir kĕnˈzĭkō [key], c.4 sq mi (10 sq km), SE N.Y., N of White Plains, formed by Kensico Dam (completed 1915) on the Bronx River. A principal unit in the New York City water supply sy...

Nash, Paul

(Encyclopedia)Nash, Paul, 1889–1946, English painter and wood engraver. He studied at the Slade School of Art, London. Nash worked at the front as official artist in both World Wars. He helped to form Unit One, a...

humidity

(Encyclopedia)humidity, moisture content of the atmosphere, a primary element of climate. Humidity measurements include absolute humidity, the mass of water vapor per unit volume of natural air; relative humidity (...

liter

(Encyclopedia)liter, abbr. l, unit of volume in the metric system, defined since 1964 as equal to 0.001 cubic meters, or 1 cubic decimeter. A cube that has each of its edges equal to 10 centimeters has a volume of ...

farad

(Encyclopedia)farad fărˈəd [key] [for Michael Faraday], unit of electrical capacitance, equivalent to 1 coulomb of stored charge per volt of applied potential difference. ...

period, in geologic time

(Encyclopedia)period, unit of time on the geologic timescale. Periods are shorter than an era and longer than an epoch. Periods are of variable length, generally lasting tens of millions of years, with characterist...

opus

(Encyclopedia)opus ōˈpəs [key] [Lat.,=work], in music, term used in cataloging a composer's works, designating either a single composition or a group published together or considered a unit. Opus numbers assigne...

hertz

(Encyclopedia)hertz hûrts [key] [for Heinrich R. Hertz], abbr. Hz, unit of frequency, equal to 1 cycle per second. The term is combined with metric prefixes to denote multiple units such as the kilohertz (1,000 Hz...

Holston

(Encyclopedia)Holston, river, c.120 mi (190 km) long, formed by the uniting of its northern and southern forks, NE Tenn., and flowing SW through the Great Appalachian Valley, joining the French Broad River at Knoxv...

ratio

(Encyclopedia)ratio. The ratio of two quantities expressed in terms of the same unit is the fraction that has the first quantity as numerator and the second as denominator. For example, if in a group of 100 people ...