(Fluid Mechanics) An airplane has a mass of 2.5×106 kg , and the air flows past the lower surface of the wings at 90 m/s .

If the wings have a surface area of 1400 m2 , how fast must the air flow over the upper surface of the wing if the plane is to stay in the air?

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.

The answer is trial 3.