When is potential energy transformed into kinetic energy.
a. when an object at rest is lifted to a higher elevation.
b. when an object at rest remains at rest.
c. when an object at rest is put into motion.
d. when an object in motion is stopped and put at rest.

The diagram shows the structures of horse and cat forelimbs. what does the diagram suggest about the evolutionary relationship between these two mammals? a. they have homologous structures, indicating a common ancestor. b. they have analogous structures, indicating a common ancestor. c. they have homologous structures, indicating that they do not have a common ancestor. d. they have analogous structures, indicating that they do not have a common ancestor.

Consider the nuclear equation below. 239/94 pu—-> x+ 4/2 he. what is x?

Suppose the universe were completely empty except for one object-a solid sphere moving through space of 100 km/s. what sort of path would the object be moving in? explain your answer