The work done by an external force to move a -7.00 uC charge from point A to point B is
1.80x10-3 J.
If the charge was started from rest and had 4.74*10^-4 J

Ifeel like lily and ledbetter had a fair pay act just because it was necessary especially at those times

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.