0.0 A 30-kg ball is sitting on top of a 50 m hill. The ball rolls down the hill. As the ball reaches the very bottom of the hill, what is its
velocity? (Assuming no energy is lost due to friction. This would mean that the PEtop = KEbottom)

12 drag each label to the correct category. decide whether each statement describes mass or weight. measured in newtons measured in kilograms does not change when gravity changes === a gravitational force changes when gravity changes the amount of matter in something mass weight

Several mountains together form a mountain . a few of these combined form a mountain system. several systems combined form a mountain , which can stretch thousands of miles in length.

Select the correct answer. what does the process of natural selection involve?