Utube Sri Lankan

United States of America
FlagGreat Seal
Motto: In God We Trust  (official)
E Pluribus Unum  (Latin; traditional)
(Out of Many, One)
Anthem: "The Star-Spangled Banner"
CapitalWashington, D.C.
38°53′N 77°01′W / 38.883°N 77.017°W / 38.883; -77.017
Largest cityNew York City
Official languagesNone at federal level1
National languageEnglish (de facto)2
DemonymAmerican
GovernmentFederal constitutional republic
 - PresidentBarack Obama (D)
 - Vice PresidentJoe Biden (D)
 - Speaker of the HouseNancy Pelosi (D)
 - Chief JusticeJohn Roberts
Independence from the Kingdom of Great Britain
 - DeclaredJuly 4, 1776 
 - RecognizedSeptember 3, 1783 
 - Current constitutionJune 21, 1788 
Area
 - Total9,826,630 km2 (3rd/4th3)
3,794,066 sq mi 
 - Water (%)6.76
Population
 - 2009 estimate306,055,000 (3rd4)
 - 2000 census281,421,906 
 - Density31/km2 (180th)
80/sq mi
GDP (PPP)2008 estimate
 - Total$14.334 trillion (1st)
 - Per capita$47,025 (6th)
GDP (nominal)2008 estimate
 - Total$14.334 trillion (1st)
 - Per capita$47,025 (17th)
Gini (2007)46.3 
HDI (2006)▼ 0. 950 (high) (15th)
CurrencyUnited States dollar ($) (USD)
Time zone(UTC-5 to -10)
 - Summer (DST) (UTC-4 to -10)
Drives on theRight
Internet TLD.us .gov .mil .edu
Calling code1
1English is the official language of at least 28 states—some sources give a higher figure, based on differing definitions of "official". English and Hawaiian are both official languages in the state of Hawaii.
2English is the de facto language of American government and the sole language spoken at home by 82% of Americans age five and older. Spanish is the second most commonly spoken language.
3Whether the United States or the People's Republic of China is larger is disputed. The figure given is from the U.S. Central Intelligence Agency's World Factbook. Other sources give smaller figures. All authoritative calculations of the country's size include only the fifty states and the District of Columbia, not the territories.
4The population estimate includes people whose usual residence is in the fifty states and the District of Columbia, including noncitizens. It does not include either those living in the territories, amounting to more than 4 million U.S. citizens (most in Puerto Rico), or U.S. citizens living outside the United States.

The United States of America (commonly referred to as the United States, the U.S., the USA, or America) is a federal constitutional republic comprising fifty states and a federal district. The country is situated mostly in central North America, where its forty-eight contiguous states and Washington, D.C., the capital district, lie between the Pacific and Atlantic Oceans, bordered by Canada to the north and Mexico to the south. The state of Alaska is in the northwest of the continent, with Canada to its east and Russia to the west across the Bering Strait