Two objects with masses represented by m1 and m^2 are moving such that their combined total momentum has a magnitude of 17.0 kg · m/s and points in a direction 71.5° above the positive x-axis. Object m1 is moving in the x direction with a speed of v1 = 2.75 m/s and m^2 is moving in the y direction with a speed of v2 = 3.25 m/s. Determine the mass of each object.

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.