5. where would a roller coaster have the greatest potential energy? a. at the top of a hill b. halfway up the hill c. halfway down the hill d. at the bottom of the hill

Achild throws a ball with an initial speed of 8.00 m/s at an angle of 40.0° above the horizontal. the ball leaves her hand 1.00 m above the ground. how long is the ball in flight before it hits the ground?

What is the fate of the electrons that interact with a specimen in an electron microscope?

Based on the concept of the wave-like nature of light, huygens' theory of light postulates that the more light was "bent" by a substance the slower it would move while traversing across that substance. a) deflection b) interference c) refraction d) resonance