The mass of the black hole in the center of the galaxy has been determined by observing the motion of stars orbiting it.
a. True
b. False
Indicate whether the statement is true or false
Question 2
In contradiction to the teachings of Aristotle, Galileo found that an object with no forces (and no friction) acting on it will ____.
a. move faster and faster
b. eventually stop moving
c. move at a constant speed forever
d. first increase and then decrease in speed
e. first decrease and then increase in speed