United States
The United States of America (USA or U.S.A.), commonly known as the United States (US or U.S.) or America, is a country primarily located in North America. It is a federation of 50 states, a federal capital district (Washington, D.C.), and 326 Indian reservations.}} Outside the union of states, it asserts sovereignty over five major unincorporated island territories and various uninhabited islands., November 1997, pp. 1, 6, 39n. Both viewed April 6, 2016.}} The country has the world's third-largest land area,, the United States is the third-largest country in the world by land area, behind Russia and China. By total area (land and water), it is the third-largest, behind Russia and Canada, if its coastal and territorial water areas are included. However, if only its internal waters are included (bays, sounds, rivers, lakes, and the Great Lakes), the U.S. is the fourth-largest, after Russia, Canada, and China.Coastal/territorial waters included:
Only internal waters included: |name=largestcountry}} second-largest exclusive economic zone, and third-largest population, exceeding 334 million.
Paleo-Indians migrated across the Bering land bridge more than 12,000 years ago. British colonization led to the first settlement of the Thirteen Colonies in Virginia in 1607. Clashes with the British Crown over taxation and political representation sparked the American Revolution, with the Second Continental Congress formally declaring independence on July 4, 1776. Following its victory in the Revolutionary War (1775–1783), the country continued to expand across North America. As more states were admitted, sectional division over slavery led to the secession of the Confederate States of America, which fought the remaining states of the Union during the 1861–1865 American Civil War. With the Union's victory and preservation, slavery was abolished nationally. By 1890, the United States had established itself as a great power. After Japan's attack on Pearl Harbor in December 1941, the U.S. entered World War II. The aftermath of the war left the U.S. and the Soviet Union as the world's two superpowers and led to the Cold War, during which both countries engaged in a struggle for ideological dominance and international influence. Following the Soviet Union's collapse and the end of the Cold War in 1991, the U.S. emerged as the world's sole superpower.
The U.S. national government is a presidential constitutional republic and liberal democracy with three separate branches: legislative, executive, and judicial. It has a bicameral national legislature composed of the House of Representatives, a lower house based on population; and the Senate, an upper house based on equal representation for each state. Substantial autonomy is given to states and several territories, with a political culture that emphasizes liberty, equality under the law, individualism, and limited government.
One of the world's most developed countries, the United States has had the largest nominal GDP since about 1890 and accounted for 15% of the global economy in 2023. It possesses by far the largest amount of wealth of any country and has the highest disposable household income per capita among OECD countries. The U.S. ranks among the world's highest in economic competitiveness, productivity, innovation, and higher education. Its hard power and cultural influence have a global reach. The U.S. is a founding member of the World Bank, IMF, Organization of American States, NATO, and World Health Organization, as well as a permanent member of the UN Security Council. Provided by Wikipedia
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141
Long-Term Hydrologic Monitoring Program Sampling and Analysis Results for 2012 at Rulison, Colorado
Published 2012Other Authors: “…Legacy Management (United States)…”
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142
Boron nitride composites by chemical vapor deposition by Pierson, H. O.
Published 1975Other Authors: “…Labs., Albuquerque, NM (United States)…”
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143
Theoretical studies of flash x-ray diagnostics for fuel motion experiments by Halbleib, Sr., J. A., Phillips, A. R.
Published 1975Other Authors: “…Labs., Albuquerque, NM (United States)…”
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144
Preparation of damage-free surfaces of metal single crystals for ion channeling by Swier, R. G.
Published 1975Other Authors: “…Labs., Albuquerque, NM (United States)…”
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145
Rates of mutant production in Bacillus subtilis by dry heat and gamma irradiation. A preliminary report by Dillon, R. T., Conley, M. B.
Published 1975Other Authors: “…Labs., Albuquerque, NM (United States)…”
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146
Summary of solar eclipse operations in Australia, June 1974 by Lathrop, L. W.
Published 1975Other Authors: “…Labs., Albuquerque, NM (United States)…”
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147
Review of electrical switch design factors for high reliability space and weapons applications by Cuthrell, R. E.
Published 1975Other Authors: “…Labs., Albuquerque, NM (United States)…”
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148
Deep rock disposal experiment No. 1 acoustic studies. by Beattle, A. G.
Published 1975Other Authors: “…Labs., Albuquerque, NM (United States)…”
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149
Ultrasonic velocity determinations in ATJ-S graphite composite for 70 F to 6100 F by Gieske, J. H.
Published 1975Other Authors: “…Labs., Albuquerque, NM (United States)…”
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150
Sandia Laboratories technical capabilities electronics. by Lundergan, C. D.
Published 1975Other Authors: “…Labs., Albuquerque, NM (United States)…”
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151
Sandia Laboratories technical capabilities testing. by Lundergan, C. D.
Published 1975Other Authors: “…Labs., Albuquerque, NM (United States)…”
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152
Analytical investigation of a grade-crossing accident between a railroad train and a spent reactor fuel cask by Dennis, A. W.
Published 1975Other Authors: “…Labs., Albuquerque, NM (United States)…”
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153
Environmentally assisted crack growth in high strength steels by Munford, J.
Published 1975Other Authors: “…Labs., Albuquerque, NM (United States)…”
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154
Probes for density measurements of F<sub>2</sub>, HF, and DF in continuously operating chemical lasers by Hill, R. A., Hargis, Jr, P. J.
Published 1975Other Authors: “…Labs., Albuquerque, NM (United States)…”
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155
COLODE a collocation subroutine for ordinary differential equations. by Hulme, B. L., Daniel, S. L.
Published 1974Other Authors: “…Labs., Albuquerque, NM (United States)…”
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156
Xenon oxide formation and destruction in high pressure mixtures excited by high energy electron beams by Tisone, G C., Hoffman, J M.
Published 1974Other Authors: “…Labs., Albuquerque, NM (United States)…”
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157
Spheroidization of normal and deuterated polyethylene by Prevender, T. S.
Published 1974Other Authors: “…Labs., Albuquerque, NM (United States)…”
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158
Radiation evaluation of 512-bit PROM's in gamma dose, gamma rate, and neutron dose environments by Barnum, J. H.
Published 1974Other Authors: “…Labs., Albuquerque, NM (United States)…”
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159
Applications of tunable dye lasers in reactor waste management by Hargis, Jr, P. J., Gobeli, G. W., Hohimer, J. P.
Published 1974Other Authors: “…Labs., Albuquerque, NM (United States)…”
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160
Coded source radiography by Hansche, B. D.
Published 1974Other Authors: “…Labs., Albuquerque, NM (United States)…”
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