(a) show that the heat capacity of a one-dimensional array of n coupled linear oscillators is given by cy3nkx (e - 1)2 where x hvlkt, and it is assumed that both longitudinal and transverse waves can propagate along the array. (b) evaluate this expression for cy in the low and high temperature limits.

From negative to negative

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.