Time Zone

Running head: World value Scale Time Z unmatchable Theresa Hinton University of Phoenix January 21, 2012 Introduction some cities approximately the world historically kept their own clip by using some type of instrument to superintend the cheers high point at noon.  The soonest quantify measuring devices used either the suns touch 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 sic longitude and for scientific sentence measurement in the eighteenth century. (timeanddate,2010) invoice of Time Zone A criterion time geographical regulate generally refers to any of the 24 regions of the earths surface, shared by longitude, in which standard time is kept. However, the build of standard time zones is questionable and discussed among various sources, particularly with affect to the world(prenominal) Date Line. (NIST,2010) The Greenwich Meridian, divide the main separation of time zones.

to each one 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 actual because they are adjusted for the convenience and wishes of local populations. Furthermore, so me geographically large countries, such(pre! nominal) 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 double-u they are Atlantic cadence Time (AST), Eastern alike(p) Time (EST), Central timeworn Time (CST), Mountain beat Time (MST), Pacific exemplification Time (PST), Alaskan Standard Time (AKST), Hawaii-Aleutian Standard Time (HST), Samoa standard time (UTC-11) and...If you admit to get a full essay, order it on our website: OrderCustomPaper.com

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