Tennis balls traveling at greater than 100 mph routinely bounceoff tennis rackets. At some sufficiently high speed, however, theball will break through the strings and keep going. The racket is apotential-energy barrier whose height is the energy of the sloweststring-breaking ball. Suppose that a 100 g tennis ball traveling at220mph is just sufficient to break the 2.0-mm-thick strings.Estimate the probability that a 150mph ball will tunnel through theracket without breaking the strings.
Give your answer as a power of 10 rather than a power ofe.
