By how much is the electrical force between a pair of charges reduced when their separation distance is doubled? Tripled?

Wavelength divides in half and speed stays the same.

It equals just about 6,300 km per hour each day an week

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.