When you are learning to juggle two balls, one in your right hand and the other in your left hand, you are told to throw the second ball when the first ball has reached its highest point. When you catch the first ball, you are told to throw the first ball back to your right hand when the second ball has reached its highest point. What physical reason best explains this instruction?

Can someone read this article and tell me the 1) key ideas and 2) one key quote (copy and paste the link the article is not to long at all)from

Candace is a flight attendant for a large, international airline. while in china, candace often finds look-alikes in famous designer brands of watches, handbags, clothing, and golf clubs. in fact, she'll do her christmas shopping there and will even buy good-quality items for auctioning at her son's preschool events back in the u.s. candace's actions demonstrate

Suppose you are a freshmen in college and you have not declared a major. one reason you enrolled at your respective college was the school's vibrant social life. at the same time, you want to balance your academic life because you know that your grades will matter for graduate school or job applications.you decide to forgo partying for two hours to study for an upcoming economics exam. in your first semester's principles of economics class, you learn that the enjoyment you would have received from partying is an example of a(n)