The Containment Strategy was the principal strategy adopted by the US in foreign policy matters during the Cold War era.
It aimed to stop the expansion of the national enemy: communism, and in turn, of the URSS and the countries under its influence, that were denominated the Eastern Bloc. It consisted on responding to any attempt of expansion performed by the URSS, seeking to spread communism in Eastern Europe, Korea, China Africa, Vietnam, and Latin America.
Isaac Newton was creative in his use of prisms to show how white light is actually made up of multiple colors. He used logic in the way he presented his arguments rhetorically in order to convince readers of the correctness of his conclusions.
Newton was not the first to experiment with passing light through prisms to determine how light works. French philosopher Rene Descartes had done prism experiments of his own. But Descartes had thought that passing through a prism actually modified the light in order to produce the color spectrum. Newton correctly understood that when light refracted through the prism, it revealed the range of colors that were naturally in the light. He then used a second prism, blocking all but one color, to show that a single color passing through a prism was not modified in color. He also showed--by positioning the second prism differently--how the multiple colors of light could be recombined into white light again.
Newton's 1672 paper on light refracting through prisms established his reputation as a scientist. He continued to study light throughout his scientific career, publishing a larger work in 1704 on <em>Opticks </em>(as they spelled "optics" then).
Lack of workers was not a problem that cities faced during the Gilded Age.
1. D. Inca settlements were difficult to find and reach because they were build at high altitudes on rough terrain.
Inca civilizations were well hidden and protected from outside influences due to their location high in the Andes Mountains of South America. It took the Spanish a while to find them, though diseases reached the outlying settlements even when the Spanish did not.
2. D. infectious diseases and drought
The Maya civilization experienced a lengthy and extreme drought that led to widespread starvation, which reduced their population and influence over the region long before Europeans arrived in Mesoamerica. The Inca and the Aztec populations were wiped out by the infectious diseases the Spanish conquistadores brought with them.
I also just took the test and got it right
