You throw your English book DOWNWARD at 15 m/s off the roof of a building. If your book is in the air for a total of 0.514 seconds, how many
meters did it fall before hitting the ground? Ignore air resistance.

Which statement is true if the refractive index of medium a is greater than that of medium b? a. total internal reflection is possible when light travels from air to medium b to medium a. b. total internal reflection is possible when light travels from medium a to medium b. c. total internal reflection is possible when light travels from medium b to medium a. d. total internal reflection is possible when light travels from air to medium a. e. total internal reflection is possible when light travels from air to medium b.