Answer:
The answer should be: Companies replaced hand-operated brakes with air brakes on trains.
Explanation:
You have to think how hard it was for trains to stop with hand operated brakes. Trains go fast, and not stopping in time can be dangerous. Hope this helped :)
Answer:trees
Explanation:because trees are paper
It gives congress its power and limits. it creates the two sections of congress
5th to the 15th century is when the middle ages were!
Explanation:
Participation was far from open to all residents, but was instead limited to adult, male citizens (i.e., not a foreign resident, regardless of how many generations of the family had lived in the city, nor a slave, nor a woman), who "were probably no more than 30 percent of the total adult population".
