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Thomas Hart Benton (3/14/1784 - 4/10/1858) was a U.S. Senator from Missouri and a staunch advocate of westward expansion of the United States. He served in the Senate from 1821 to 1851, becoming the first member of that body to serve five terms. Benton was an architect and champion of westward expansion by the United States, a case that became known as the Manifest Destiny.

Thomas Benton

Thomas Hart Benton (3/14/1784 - 4/10/1858) was a U.S. Senator from Missouri and a staunch advocate of…

An illustration showing how to square binomial (a + b). (a + b)² = a² + 2ab + b².

Squaring Binomial (a + b)

An illustration showing how to square binomial (a + b). (a + b)² = a² + 2ab + b².

An illustration showing how to square binomial (a - b). (a - b)² = a² - 2ab + b².

Squaring Binomial (a - b)

An illustration showing how to square binomial (a - b). (a - b)² = a² - 2ab + b².

An illustration of crusaders before Jerusalem. The Crusades were a series of military campaigns of a religious character waged by much of Christian Europe against external and internal opponents. Crusades were fought mainly against Muslims, though campaigns were also directed against pagan Slavs, Jews, Russian and Greek Orthodox Christians, Mongols, Cathars, Hussites, Waldensians, Old Prussians and political enemies of the popes. Crusaders took vows and were granted an indulgence for past sins. The Crusades originally had the goal of recapturing Jerusalem and the Holy Land from Muslim rule and were launched in response to a call from the Eastern Orthodox Byzantine Empire for help against the expansion of the Muslim Seljuk Turks into Anatolia.

Crusaders

An illustration of crusaders before Jerusalem. The Crusades were a series of military campaigns of a…

"The expansion of solids by heat is clearly shown by the following experiment: m represents a ring of metal, through which, at the ordinary temperature, a small iron or copper ball, a, will pass freely, this ball being a little less than the diameter of the ring. If this ball be now heated by the flame of an alcohol lame, it will be come so far expanded by heat as no longer to pass through the ring." —Wells, 1857

Expansion of Solids

"The expansion of solids by heat is clearly shown by the following experiment: m represents a ring of…

Expansion of a gas. Alcohol burner.

Gas Expansion

Expansion of a gas. Alcohol burner.

Isothermal expansion is a change in a system with a constant temperature. This occurs when: A. Said system is in contact with an outside heat source and B. The change in temperature is slow enough so that the reservoir can adjust through heat exchange.

Isothermal Expansion

Isothermal expansion is a change in a system with a constant temperature. This occurs when: A. Said…

Hot, expanding air bubbles through the water.

Hot air experiment

Hot, expanding air bubbles through the water.

American soldiers fighting in Monterey, Mexico.

Capture of Monterey

American soldiers fighting in Monterey, Mexico.

Scene in the Philippines.

Philippines

Scene in the Philippines.

James K. Polk, eleventh president of the United States, known for his expansionist policies.

James K. Polk

James K. Polk, eleventh president of the United States, known for his expansionist policies.