A certain spring has a spring constant k1 = 720 N/m as the spring is stretched from x = 0 to x1 = 39 cm. The spring constant then changes to k2 = 210 N/m as the spring is stretched to x2 = 67 cm. From x2 = 67 cm to x3 = 91 cm the spring force is constant at F3 = 115 N.

Divide 108.2 x 10^6 into 1.5 x 10 and the result will be in au (astronomical units)

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.

Isso9

Gotta have a picture ^^