A robot pushes a 10 kg box of rocks with a horizontal force of 300N across a floor. If the coefficient of kinetic friction is 0.25, what is the total net work done by the system on the box?

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.