When a ball rolls down a hill what energy conversion occurs

According to your text, systems of government in the united states are shifting from what to what?

Which entity owns most if the television stations, radio stations, and newspapers in the united states

1u.s. history question! question: how did world war ii change the united states' position in world affairs? i need good explanation to support the answer otherwise i get docked points. real answers only ! you! : )