Can someone help me with this ?

I need proper explanation ~

Which is the best for showing percentages of different types of cars sold(gas hybrid , electric , other ) in the united states ?

The law of the conservation of momentum says that the total momentum of any closed and isolated system cannot

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.