If you walk 1.2 km north and then 1.6 km east, what are the magnitude and direction of your resultant displacement? a. magnitude: 2.00 km; direction: 36.9° east of north b. magnitude: 2.00 km; direction: 53.1° east of north c. magnitude: 1.1 km; direction: 36.9° east of north d. magnitude: 1.1 km; direction: 53.1° east of north

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.