The bending of waves as they pass between media is called .?

For general projectile motion, when the projectile is at the highest point of its trajectory, its acceleration is zero? a)the horizontal and vertical components of its velocity are zero. b) its velocity is perpendicular to the acceleration. c)the horizontal component of its velocity is zero. d)its velocity and acceleration are both zero.

What energy transformations occur each time the skateboarder rolls up the ramp?

Which of the following are forms of phase changes a. freezing b. condensation c. heating d. exchanging