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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New technologies like steam engines, railroads, and telegraphs which made communication and transporting goods and materials across the country with ease turned many local businesses into national companies.
Answer: Black Death, pandemic that ravaged Europe between 1347 and 1351,The Black Death was not an airborne contagious disease and did not thrive the epidemic westward to Mediterranean ports,
Explanation: