Please help me. im sooo tired

What is the purpose of the system of checks and balances

Name three new weapons that changed how ww! was fought and how?

1. what was the result of growing nationalism and pan-africanism on european-african relations? africans were encouraged to seek independence from europe. european colonialism grew and strengthened in africa. the change of power from european to african rule went smoothly. africans believed they could live peacefully with europeans.