The author says a caisson is kept free of water because it is like

Idon't really understand the question. it counts for 20% of my lesson grade and i really need putting the answer into words. anything will . i need asap so im awarding 30 points. a disagreement between states of the united states concerning the rights of states vs. the authority of the national government led to the civil war. state governments were forced by war into a subservient position. what might happen if national governments ceded their authority to a world government by international treaty?

Which of the following is one example of an ideological conflict that became one of the causes of world war ii?

The theory of mercantilism holds that a nation's economic power comes from a a. enslave people b. become industrial c. willingness to explore d. favorable balance of trade