Know Very Basics about United States of America (USA)

USA.  (United States of America)  is very famous and powerful country in the world. USA plays very powerful role in world's economy and politics. You need to know very basics about the United States of
America. Let's see,

Capital - Washington, D.C. (38°53′N 77°01′W)

Largest city - New York City (40°43′N 74°00′W)

Official languages - None at federal level

National language - English

Ethnic groups details According to (2016)

77.1% White

13.3% Black

5.6% Asian

2.6% Other/multiracial

1.2% Native

0.2% Pacific Islander

Ethnicity: 17.6% Hispanic or Latino

82.4% non-Hispanic or Latino

Religion details According to (2016)

73.7% Christian

18.2% Unaffiliated

2.1% Jewish

0.8% Muslim

2.5% Other

2.6% Unknown

Demonym American Government -

Federal presidential constitutional republic

President - Donald Trump

Vice President - Mike Pence

House Speaker - Paul Ryan

Chief Justice - John Roberts

Legislature - Congress

Upper house - Senate

Lower house - House of Representatives

Independence from Great Britain

Declaration

July 4, 1776

Confederation

March 1, 1781

Treaty of Paris

September 3, 1783

Constitution

June 21, 1788

Last polity admitted

March 24, 1976

Total area - 3,796,742 sq mi (9,833,520 km2)

Water (%) - 6.97

Total land area - 3,531,905 sq mi (9,147,590 km2)

Population According to 2010 census -

308,745,538

Density

85/sq mi (32.8/km2)

GDP  Total - $19.390 trillion

Per capita income - $59,501

Human Development Index  (2017) -

very high 13th

Currency - United States dollar ($) (USD)

Time zone - UTC−4 to −12, +10, +11

Summer (DST)

UTC−4 to −10

Date format - mm/dd/yyyy

Driving side - right

Telephone Calling code -  +1

ISO code - US

Internet Top Level Domain -  .us