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The first transcontinental railroad was completed in 1869. Railroads played a large role in the development of the United States from the industrial revolution in the Northeast (1820s–1850s) to the settlement of the West (1850s–1890s). The American railroad mania began with the founding of the first passenger and freight line in the country ...
Virginia v. John Brown. The Ostend Manifesto, also known as the Ostend Circular, was a document written in 1854 that described the rationale for the United States to purchase Cuba from Spain while implying that the U.S. should declare war if Spain refused. Cuba's annexation had long been a goal of U.S. slaveholding expansionists.
Double-stack rail transport is a form of intermodal freight transport in which railroad cars carry two layers of intermodal containers. Invented in the United States in 1984, it is now being used for nearly seventy percent of United States intermodal shipments. Using double stack technology, a freight train of a given length can carry roughly ...
The United States embargo against Cuba prevents US businesses, and businesses organized under US law or majority-owned by US citizens, from conducting trade with Cuban interests. It is the most enduring trade embargo in modern history. [1] [2] The US first imposed an embargo on the sale of arms to Cuba on March 14, 1958, during the Fulgencio ...
Cube root. In mathematics, a cube root of a number x is a number y such that y3 = x. All nonzero real numbers have exactly one real cube root and a pair of complex conjugate cube roots, and all nonzero complex numbers have three distinct complex cube roots. For example, the real cube root of 8, denoted , is 2, because 23 = 8, while the other ...
If a small cube of metal is compressed between the jaws of a press, it will contract—that is it will be squashed somewhat—and a very large force can be resisted by it without ultimate failure. However, if a long piece of metal of the same cross section is compressed, it will deform sideways into a bow shape; the process is called buckling ...
U.S. Route 66 Will Rogers Memorial Highway The final routing of U.S. Route 66 in red, with earlier alignments in pink Route information Length 2,448 mi (3,940 km) Existed November 26, 1926 (1926-11-26) –June 26, 1985 (1985-06-26) Tourist routes Historic Route 66 Major junctions West end Santa Monica, California East end Chicago, Illinois Location Country United States States California ...
Doubling the cube is the construction, using only a straightedge and compass, of the edge of a cube that has twice the volume of a cube with a given edge. This is impossible because the cube root of 2, though algebraic, cannot be computed from integers by addition, subtraction, multiplication, division, and taking square roots.