Which factors must be known to calculate an object's gravitational potential energy

What are four key elements of the study of economics?

Which of the following shows the correct order in which light information travels through the eye? (2 points) lens, pupil, retina, optic nerve pupil, lens, retina, optic nerve pupil, lens, optic nerve, retina lens, pupil, optic nerve, retina

Which ocean is on the eastern coast of north and south america? arctic ocean indian ocean pacific ocean atlantic ocean