a worker lifts a load of 200 n with the of a lever by applying an effort of 50 n. the load is
kept at a distance of 20 cm and the effort is applied at a distance of im from the fulcram. find the
mechanical advantage, velocity ratio, and efficiency of the lever used.

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.