PLEAS HELP An astronaut travels to a position in space that is a height of 2R above the surface of Earth, where R is Earth's radius. At this height, the force of Earth's gravity is of its force at the surface.

1/3

1/9

1/8

1/4

potential energy is directly proportional to height.

more height = more potential energy.

greatest increase in height = greatest increase in potential energy

where are the points with the greatest increase in height ?

has to be c-e or d-e .

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.