Which document went into effect in 1789?

At 81, which man was the oldest delegate at the 1787 Constitutional Convention? Which 1787 law governing the area north of the Ohio River became a model for territories entering the Union? In 1787, which state became the first to ratify the Constitution? Who served as U.S. vice president from 1789 to 1797? In 1789, which French landmark was stormed and its governor killed? In the 1790s, the new French tricolor replaced a royal flag bearing which floral symbol? "Reflections on the Revolution in France" (1790) is a major work by which British statesman and thinker? Who was first lady from 1797 to 1801?