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A river valley civilization is an agricultural nation or civilization situated beside and drawing sustenance from a river. A "civilization" means a society with large permanent settlements featuring urban development, social satisfaction, specialization of labor, centralized organization, and written or other formal means of communication. A river gives the inhabitants a reliable source of water for drinking and agriculture. Additional benefits include fishing, fertile soil due to annual flooding, and ease of transportation. The first great civilizations, such as those in Mesopotamia, Harappa and Ancient Egypt, all grew up in river valleys. Tigris River flourished near Mesopotamia civilization and river nile flourished near civilization of Egypt.
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on July 26, 1948, he issued an executive order abolishing segregation in the armed forces and ordering full integration of all the services. Executive Order 9981 stated that “there shall be equality of treatment and opportunity for all persons in the armed forces without regard to race, color, religion, or national origin.” The order also established an advisory committee to examine the rules, practices, and procedures of the armed services and recommend ways to make desegregation a reality. There was considerable resistance to the executive order from the military, but by the end of the Korean conflict, almost all the military was integrated.
A soda in a styrofoam cup with a lid, coffee in a thermos with the lid closed is the isolated systems.
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Styrofoam cups and thermos containers are typical examples of containers that don’t allow the transfer of heat energy in their environments. A system is said to be isolated if it doesn’t allow heat exchange with its surroundings. A Styrofoam cup with a lid keeps the coffee hot due to its insulation properties.
Thermos container is a more effective insulator since it is made of double-walled container to lock either heat or cold inside. Insulators create effective isolated system depending on the materials they were made from. A completely isolated system does exist.
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Although fossil fuels are continually formed by natural processes, they are generally classified as non-renewable resources because they take millions of years to form and known viable reserves are being depleted much faster than new ones are generated
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It harms both driving skills and judgement. ... Alcohol negatively affects many skills needed for safe driving, including your reaction time and ability to see clearly. It can also harm your judgment of speed and distance, lower your inhibitions, and make you more prone to taking chances.
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