How did the articles of confederation prevent the national government from becoming too powerful?

The largest lake in south america is lake titicaca?

What was the overall impact of eli whitneys introduction of interchangeable parts?

According to robert kennedy, how might the historian see 1962a. as a year of resistance by the southb. as a year of great progress in civil rightsc. as a year of rioting and violenced. as a year of resegregation