The physical, natural and human sciences experienced the same impulse as technique and industry. In physics, experiences were made with light and electricity. In 1903 Ernest Rutherford discovered the radioactive elements and years later he devised a model of the atom. In 1895, Guillermo Róngten discovered X-rays.
In 1905, <u><em>Alberto Einstein</em></u> based on his mathematical studies revolutionized the conception of the cosmos with his Theory of Relativity, starting point of new investigations. This discovery meant a huge advance in science, comparable to those made by Copernicus, Kepler and Newton.
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C. “Because of the increased employment opportunities, Americans who had been struggling since the Great Depression Jnally enjoyed a high standard of living again.” (Paragraph 6)
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A strong and organized empire should also be able to have a strong and very organized army. This means they would most likely populate their frontier with settlers and station armies there to defend the frontier. The army would be a professional one made from highly skilled and dedicated soldiers that would be able to repel any opposing threat.
