How did machines change workers’ lives?
they required more expertise and skill.
they divided labor into many small tasks.
they decreased the pace of work.
they increased the number of workers needed.

Of those who attended the philadelphia convention, which of the following traits would be least likely to be found? a. many were highly educatedb. all were menc. many were from the urban centersd. many came from the western frontiers

Ahistorian who compares the expansion of political systems to the expansion of economic systems is organizing history by o a. region b. culture c. period d. theme

Why did einstein write a letter to president roosevelt