Type 1 to 2 paragraphs describing the changes in potential, kinetic, and thermal energy of the cart at each of the four positions along the track. Be sure to define your system. Also include the positions of the cart where are each form of energy is at its maximum and minimum values.

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.