Which of the following is true of Claudius Ptolemy?
A) He was interested in philosophical rather than practical questions about the Universe.
B) For him, first principles took second place to accuracy.
C) He believed that Earth was at the exact center of the Universe.
D) He disagreed completely with Aristotle's ideas of the Universe.
Question 2
The velocity needed to stay in a round orbit is called the__________.
A) circular velocity
B) linear velocity
C) vertical velocity
D) horizontal velocity