For each of the following, estimate the difference between the speeds of the particle when it is in the first excited state and when it is in the lowest-energy state: (i) an electron confined by an infinite square-well potential whose width is roughly to the radius of an atom (about 10-10 m); (ii) a tennis ball confined by an infinite square-well potential whose width is equal to the width of a tennis court. What do your answers tell you about the mechanics of microscopic and macroscopic systems