C. Debt owed to the United Nations.
Answer:
The difference between the two trains is the direction in which they move.
Explanation:
Velocity incorporates not only speed, but also direction. In this case, both trains move at a constant speed each of 80 km/hr. However, there difference is that one is moving west, while the other is moving east.
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From colonial times into the early 20th century a majority of americans lived in the countryside and worked on farms. A dramatic expansion in farming took place from 1860 yo 1910. The number of farms tripled from two million in 1860 to 6 million in 1905. The number of people living on farms grew from about 10 million in 1860 to 22 million in 1880 to 31 million in 1905.
This means that the <em>cities at the end of the 19th century</em> were large because of the rural life. Although the eastern image of farm life on the prairies emphasizes the isolation of the lonely farmer and farm life, in reality rural folk created a rich social life for themselves.
Chapultepec on the edge of mexico city
