Answer:
d. our division of time into hours, minutes, and seconds.
Explanation:
The Sumerians were responsible for dividing time the way we do today. First, they determined that the day would begin at sunrise and end only if sunset, where the night would begin that would only end when the sun rose again. After that, observing the skies and their changes throughout the day and night, they developed a complex, but very efficient, division and timing system. They realized that the day could be divided into 24 hours and that each hour could be divided into 60 minutes, so each minute should have 60 seconds.
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The Roaring Twenties is the term used to describe the <span>great prosperity in the society and culture during the 1920s</span><span> in the Western world. The period was attributed to economic prosperity especially in the countries : United States, Canada and most nations in the Western Europe. This era marks the emergence of the use of technology such as telephones, films and motion pictures, refrigeration, electricity and many more.</span>
Answer:
The Black Codes, sometimes called Black Laws, were laws governing the conduct of African Americans (free blacks). The best known of them were passed in 1865 and 1866 by Southern states, after the American Civil War, in order to restrict African Americans' freedom, and to compel them to work for low wages. However, Black Codes existed before the Civil War, and many Northern states had them. In 1832, "in most of the United States, there is a distinction in respect to political privileges, between free white persons and free coloured persons of African blood; and in no part of the country do the latter, in point of fact, participate equally with the whites, in the exercise of civil and political rights."
