A 6 kg block of cheese is dropped from a height of H meters above the ground. If the cheese takes 1.6 seconds to hit the ground, what is the value of H?

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.

//(b) both involve the use of levers;

Number of electron i think