FILL IN THE BLANKS 20PTS When air resistance equals the weight of an object, the object has reached and its acceleration = .

The speed of light in a material is 0.50 c. what is the critical angle of a light ray at the interface between the material and a vacuum?

How are the crust and the inner core alike? a) they are both solid. b) they both have the same temperature. c) they are both under the same pressure. d) they are both very close to the center of the earth.

Select all the correct answers. which three statements about electromagnetic radiation are true?