A ball, with a mass of 10 kg, is dropped from the top of a building, from a height of 20 meters. Explain what will
happen to the potential energy if the 10 kg mass is replaced with a mass of 40 kg and the height of the drop remains
constant.

A)The potential energy stays the same

B)The potential energy increases 16 times.

C)The potential energy increases two times.

D)The potential energy increases four times

Which process in respiration happens first? a)pyruvate processing b)electron transport chain c)krebs cycle d)glycolysis

The image shows the evolution of a species of fish. a few fish from a population developed different social behaviors and evolved into different species. two fish according to the image, the fish underwent . the new species of fish had mating seasons that were different from that of the original fish. because of the differences in mating seasons, the fish underwent reproductive isolation. this mode of isolation would be .

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above