Why did president johnson believe that it was important for the united states to win in vietnam?

Which statement best describes the underground railroad? a.) it is a train that took slaves from the south to the north. b.) it is a business that harriet tubman founded to slaves become free. c.) it is a secret route that slaves took to escape from southern slave states to the north. d.) it is a road that slave owners disliked using for travel.

Which of the following flow charts accurately illustrates the history of constitutional amendments in the united states?

Space is not completely empty. there are small particles in space. what happens when these particles come together?