Answer:
A slavery helped Africans become civilized
Explanation:
Calhoun was one of the strongest supporters of slavery before the Civil War. He was a southern politician, strong-opinioned, and he made his states-rights support and slavery support very clear. He tried to support this using the "positive good" argument, which claimed that putting blacks in slavery was helping them become more civilized and providing them with necessities and protection.
Why not B: He was entirely opposed to this, because slavery made him rich.
Why not C: The Dred Scott decision firmly denied the plaintiff (Dred Scott, a slave) citizenship, and said that escaped slaves should be returned to their masters. So Calhoun would not have thought this incorrect.
Why not D: Sumner was an anti-slavery northern senator who was caned by another senator, Preston Brooks, for his rhetoric against the South. Calhoun would have disliked him.
Answer:
False
Explanation:
Uncertainty is one of the biggest parts of science.
There are many things that have been uncertain in science, and there are still lots of things for us to discover.
Uncertainty in science is the reason why experiments are done and why hypotheses are made.
Uncertainty IS a part of science, and is a very important part, so the statement is false.
Answer: B, kinetic 100%, potential 0%.
Explanation:
At point D the coaster had all its potential enegergy saaved, then once it completes the loop at point E it converts that poteinal into kinetic.