At its height what was the Slave poplation the US?

Why is it referred to as September 11? The Dutch colony of New Netherlands split to become the two proprietary colonies of? What major city was burned by the union during the civil war? John Locke's 3 natural rights? Was 1964 the last year US nickels contained silver? Who was the president of the US in March of 1876? Did Abraham Lincoln's ten percent plan mean that ten percent of African Americans were allowed to become full citizens? What was the attitude of many southern whites after the us civil war? Which European country most often tried to conquer East African societies? What is the value of a US 20 dollar bill with HAWAII on it? If the coin designer initials are in front of the 1936 Indian head nickel then how much is it worth? What is the name of the US 5 cent coin? What people settled in Virginia? What South American country gained its independence in 1825? When did they get rid of the slave trade? How much gold is in a 1877 five dollar gold piece? Was there ever a nuclear meltdown in The US? The Great Depression led to high unemployment as many companies? How did Eli Whitney help to push forward the Industrial Revolution in the US? What is the history and value of a nickel with a buffalo on one side and an Indian head on the other?