What has the greatest amount of potential energy? A. a 5 kg rock raised 5 m off the floor
B. a 2 g penny in an airplane at 1000 m above the earth
C. a 2 kg boulder at the top of a 10 m hill
D. a 0.5 kg book at the top of a 100 m hill

Who was the first scientist to measure speed as distance over time?

The graph represents the distance a car travels over time while on the highway. which statement about the car's trip is accurate? a) the car does not move over time. b) the car travels at a constant velocity. c) the car's velocity increases constantly over time. d) the car's velocity decreases constantly over time.

Smallest intensity of a stimulus that you can detect 50 percent of the time is