a football is kicked directly upward with a velocity of 50 m/s. Determine: The velocity at 2s -The velocity at 5s -the velocity at 6s -the acceleration at 3s -the overall height of the football. -how far did the football fall between 6s and 7s?

The answer is water molecules are split.cellular respiration and photosynthesis are complement  reactions to each other. these are reverse reactions. in cellular respiration glucose and oxygen yield water and carbon dioxide. so, when respiration begins,  glucose molecules are split. in the opposite reaction - in photosynthesis, carbon dioxide and water yield glucose and oxygen. thus,  when respiration begins, water molecules are split.