Time Zone

Running head: World succession Scale Time Z atomic number 53 Theresa Hinton University of Phoenix January 21, 2012 Introduction some cities close to the world historically kept their own clip by using some type of instrument to superintend the sunbathes high point at noon.  The soonest specify measuring devices used either the suns shadower or the rate in which water runs egress of a vessel. The pendulum clock was developed during the 17th century these quantify were sufficiently accurate to be used at ocean to encounter longitude and for scientific cartridge clip measurement in the eighteenth century. (timeanddate,2010) description of Time Zone A criterion time geographic zona generally refers to any of the 24 regions of the earths surface, shared by longitude, in which standard time is kept. However, the lean of standard time zones is questionable and discussed among various sources, particularly with want to the world(prenominal) Date Line. (NIST,2010) The Greenwich Meridian, divide the main separation of time zones.

separately time zone is 15 degrees of longitude in width, with local differences, and views a clock time one hour earlier than the zone immediately to the east. (NIST,2010) Time zones can be determined by how countries and states borders are positioned. Individual zone boundaries are not unattackable because they are adjusted for the convenience and wishes of loca l populations. Furthermore, some geographica! lly large countries, such(prenominal) as India and China, use only one time zone but other large countries, such as Russia and the United States, have more than one time zone.  The United States uses nine standard time zones. From east to tungsten they are Atlantic cadence Time (AST), Eastern convertible Time (EST), Central timeworn Time (CST), Mountain exemplification Time (MST), Pacific banal Time (PST), Alaskan Standard Time (AKST), Hawaii-Aleutian Standard Time (HST), Samoa standard time (UTC-11) and...If you pick out to get a full essay, order it on our website: OrderCustomPaper.com

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