The important contribution to navigation made by Eratosthenes in the third-century bc was a reasonably accurate calculation of the circumference of our planet.
Who is Eratosthenes?
Eratosthenes was born in 276 BC and died in 194 BC. He was a well-known poet, mathematician, a researcher in geography, and theorist of music. He was the first to gauge the size of the planet.
The Earth was first measured by Eratosthenes of Cyrene. The precise measurement of Earth's circumference was greatly aided by Eratosthenes' work in the third-century bc.
As a result, the Eratosthenes in the third century bc accurate calculation of the Earth.
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Answer:
Feudalism deals with the relationship between nobles and vassals. Manorialism deals with the relationship between the vassals, or the lords, and the peasants or serfs.
Explanation:Manorialism was an economic structure which described how pieces of land were managed. It primarily concerned the common people of the time, the peasants, as they were the ones providing the labor on the land. Feudalism was a social structure rooted in an exchange of land for military service.
Answer:
Europeans at Ellis Island
Explanation:
I think it’s C
sorry if i’m wrong :(
During the early 1900´s three problems experienced by workers were: 1- Low wages. This resulted in that many members of a family had to work, i.e. women and child labor; 2- There were no retirement plans or similar benefits; 3- Workers had to work many more hours than today and in bad and/or hazardous conditions.