Sumer is the name of the earliest known civilization in Mesopotamia, and one of the oldest in world history.
Their growth can be attributed mostly to their success at agriculture, which enabled them to settle in large groups. There were several factors that contributed to the development of new technology and mechanisms of food production.
The first factor is the fact that Sumerians were settled in the valleys of the rivers Tigris and Euphrates, however, the area was mostly dry in terms of precipitation. This meant that farmers had to rely on the rivers, and not on rain, for irrigation. This lead them to develop a complex systems of canals that irrigated the crops.
Their irrigation system was so successful that Sumerian population rapidly expanded. Moreover, the soil was fertile because of the continuous flooding of the rivers. This flooding, however, meant that canals had to be constantly tended to and rebuilt, and Sumerians used a large labour force for this purpose.
Pressure to provide enough food for a growing population led them to continue to innovate, and this self-reinforcing cycle led to the development of technologies such as ploughs that allowed them to cultivate large areas of land with ease.
Answer:
The social and political changes experienced by African-Americans in Louisiana.
Explanation:
After the Civil War, all the slaves freed from their masters. Slavery was now legally banned by the federal government in the South. As the war ended, the Reconstruction era began in America, to correct the politics, economic, and social in the South. The 13th, 14th, and 15th amendments adopted during the Reconstruction period. Despite to bring changes in society, the government often fail to protect the African American freed slaves in the South. African American regularly endured racial violence and discrimination and stopped from voting, which threatened their political rights. Jim Crow laws legal and performed in the South, which separated the African American from whites.
The main condition to advance the astronomical knowledge from Copernicus to newton is: the planet moves in elliptical orbit, with the Sun at the focus.
What is Copernicus to Newton theory?
Isaac Newton describes physics with laws as well as classical mechanics, which is referred to as Newtonian mechanics. And Copernicus observed the planets in the sky to explain the position by assuming that the Sun should be at the center of the solar system rather than the earth. And its theory states that the earth is moving at a very high speed as well as revolving around the axis.
Copernicus also states that the planets of the solar system should orbit around the sun. He also developed the working theory which explains the geometry of the order of the planets in the solar system. Later its correct version is also published for the study purpose.
To learn more about the necessary conditions of Copernicus to Newton theory from the given link:
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Magdalene with the Smoking Flame. It is a c. 1640 oil-on-canvas depiction of Mary Magdalene by French Baroque painter Georges de La Tour. Two versions of this painting exist, one in the Los Angeles County Museum of Art and the other in the Louvre Museum.
