Initially, a ball has an angular velocity of 5.0 rad/s counterclockwise. Sometime later, after rotating through a total angle of 5.5 radians, the hall has an angular velocity of 1.5 rad/s clockwise. What is the angular acceleration? What is the average angular velocity? How much time did this take? At some point the angular velocity of the ball had to have been zero. At what angle from it's initial orientation did this occur and how long did it take?

In 1859, charles darwin published the first edition of on the origin of species, which explained his observations of various groups of animals that showed great similarities but minor differences. darwin concluded that if a population of one species separates into two different populations that live in separate locations, then over the course of many generations the different populations can develop into different species. this idea predicted many future biological findings and became the basis of modern biology. darwin’s explanation for why different species exist is best described as a(n) law. theory. inquiry. hypothesis.