- (eru)a unit of angular velocity equal to 15° per hour (one revolution per day), the rate at which the earth rotates on its axis. This unit is used to measure the drift rates of gyroscopes and various pointing devices in aerospace engineering.
Dictionary of units of measurement. 2015.
Look at other dictionaries:
earth-rate unit — A unit of angular drift, as of a gyro, equal to the rate of angular movement of the earth with respect to the stars (i.e., 15° per hour) … Aviation dictionary
Earth's gravity — Earth s gravity, denoted by g , refers to the gravitational attraction that the Earth exerts on objects on or near its surface. Its strength is usually quoted in terms of the acceleration it gives to falling bodies (acceleration due to gravity),… … Wikipedia
Earth — This article is about the planet. For other uses, see Earth (disambiguation). Earth … Wikipedia
Earth and Space Sciences — ▪ 1996 Introduction GEOLOGY AND GEOCHEMISTRY In 1995 significant developments took place in the realm of geologic mapping, which provides the foundation for the presentation and comparison of data in the Earth sciences. The most important… … Universalium
Earth's orbit — In astronomy, The Earth s Orbit involves the Earth orbiting the Sun at an average distance of about 150 million kilometers every 365.2564 mean solar days (1 sidereal year). From Earth, this gives an apparent movement of the Sun with respect to… … Wikipedia
World Currency Unit — The World Currency Unit (WCU) is an indexed unit of account (unit of account) that stands for a unit of real global purchasing power. Proposed by Lok Sang Ho of Lingnan University, Hong Kong, it was first intended to be the basis for denominating … Wikipedia
Astronomical unit — This article is about unit of length. For the full system of units, see Astronomical system of units. 1 astronomical unit = SI units 149.60×10^6 km 149.60×10^9 m Astronomical units 4.8481 … Wikipedia
List of Law & Order: Special Victims Unit characters — The cast of the thirteenth season (2011–2012). From left to right: Dann Florek, Danny Pino, Mariska Hargitay, Kelli Giddish, Richard Belzer, and Ice T. Law Order: Special Victims Unit, a spin off of the crime drama Law O … Wikipedia
Saturn V Instrument Unit — The Saturn V Instrument Unit is a ring shaped structure fitted to the top of the Saturn V rocket s third stage (S IVB) and the Saturn IB s second stage (S IVB). It was immediately below the SLA (Spacecraft/Lunar Module Adapter) panels that… … Wikipedia
rare-earth element — /rair errth /, Chem. any of a group of closely related metallic elements, comprising the lanthanides, scandium, and yttrium, that are chemically similar by virtue of having the same number of valence electrons. Also called rare earth metal. [1955 … Universalium