Question 1 of 50 Jason has 13720 J of gravitational potential energy standing at the top of a diff over the lake. After he jumps off the diff how fast does he enter the water? Jason has a mass of 75 kg.
A. 19 m/s
B. 366 m/s
C. 1400 m/s
D. 37 m/s

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.