What kinds of things might inspire inventors and engineers to create new products?

How was the government that was created at the constitutional convention similar to the one proposed in the virginia plan?

What did the u.s. want to build on the land acquired through the gadsden purchase?

How did african americans the union during the civil war? a. by serving as representatives in congress b. by enlisting in the military to fight c. by organizing massive slave revolts in the south d. by negotiating for peace with the confederacy