in-hour equation

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• Hour — The hour (symbol: h) is a unit of time. It is not an SI unit but is accepted for use with the SI.DefinitionIn modern usage, an hour is a unit of time 60 minutes, or 3,600 seconds in length. It is approximately 1/24 of a median Earth… …   Wikipedia

• Equation of time — The equation of time is the difference over the course of a year between time as read from a sundial and time as read from a clock, measured in an ideal situation (ie. in a location at the centre of a time zone, and which does not use daylight… …   Wikipedia

• Equation of time — Time Time, n.; pl. {Times}. [OE. time, AS. t[=i]ma, akin to t[=i]d time, and to Icel. t[=i]mi, Dan. time an hour, Sw. timme. [root]58. See {Tide}, n.] 1. Duration, considered independently of any system of measurement or any employment of terms… …   The Collaborative International Dictionary of English

• equation of time — The amount of time by which the mean sun leads or lags behind the true sun at any instant. Its value is positive or negative, depending on whether the true sun is ahead of or behind the mean sun. Its value never exceeds 16 1 /2 min. It is the… …   Aviation dictionary

• 12-hour clock — AM/PM redirects here. For the convenience store chain, see ampm. Clock system 12 hour 24 hour midnight (start of day) 12:00* 00:00 12:59 a.m. 00:59   1:00 a.m. 01:00   2:00 a.m. 02:00 … …   Wikipedia

• Sunrise equation — The sunrise equation as follows can be used to derive the time of sunrise and sunset for any solar declination and latitude in terms of local solar time when sunrise and sunset actually occur::cos(ωo) = tan(φ)×tan(δ)where ωo is the hour angle in… …   Wikipedia

• Defining equation (physics) — For common nomenclature of base quantities used in this article, see Physical quantity. For 4 vector modifications used in relativity, see Four vector. Very often defining equations are in the form of a constitutive equation, since parameters of… …   Wikipedia

• Institute of Medicine Equation — The institute of Medicine Equation was published in September 2002. It is the equation which is behind the 2005 Dietary Guidleines for Americans and the new food pyramid, MyPyramid.The Institute of Medicine equation uses a different approach to… …   Wikipedia

• Polar equation of a line — Polar Po lar, a. [Cf. F. polaire. See {Pole} of the earth.] 1. Of or pertaining to one of the poles of the earth, or of a sphere; situated near, or proceeding from, one of the poles; as, polar regions; polar seas; polar winds. [1913 Webster] 2.… …   The Collaborative International Dictionary of English

• Polar equation of a surface — Polar Po lar, a. [Cf. F. polaire. See {Pole} of the earth.] 1. Of or pertaining to one of the poles of the earth, or of a sphere; situated near, or proceeding from, one of the poles; as, polar regions; polar seas; polar winds. [1913 Webster] 2.… …   The Collaborative International Dictionary of English

• 24-hour clock — 24H redirects here. For the Canadian newspaper chain, see 24H (newspaper). 24 hour clock 12 hour clock 00:00 12:00 a.m. (start of day) 12 midnight 01:00 1:00 a.m. 02:00 2:00 a.m. 03:00 3:00 a.m. 04:00 4:00 a.m. 05:00 …   Wikipedia