The potential energy of the rotation of one ch3 group relative to its neighbouring ethane can be expressed as v(φ) = v0cos 3φ. show that for small displacements the motion of the group is quantized and calculate the energy of excitation from v= 0 to v= 1. what do you expect to happen to the energy levels and wavefunctions as the excitation increases to high quantum numbers?

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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.