What event showed the power and speed of locomotives? *

A race against a  horse drawn railcar in 1830

Explanation:

"When his overseer suggested that there was plenty of iron ore on the land, Cooper decided to set up an iron business. Here he invented a process for rolling steel and used it to make rails for horse driven trolleys. This later led to one of his most significant inventions, that is, the first steam powered locomotive."

buildings

explanation:

changes in factors like average income and preferences can cause an entire demand curve to shift right or left. this causes a higher or lower quantity to be demanded at a given price. demand curves relate the prices and quantities demanded assuming no other factors change. it is important for consumers to know this information, because it is crucial for them to know what they can afford and can't afford. i hope this .