Which type of government structure is practiced by the european union? (unitary, federal, or confederal)

If a swimmer is traveling at a constant speed of 0.85 m/s, how long would it take to swim the length of a 50m olympic sized pool?

Who is the current chief justice of the united states?

The were so closely connected to the tang dynasty that korean elites used chinese as their written language. they set up a statewide academy that trained government officials in the philosophy of .