A weather balloon is floating at a constant height above Earth when it releases a pack of instruments. a) If the pack hits the ground with a velocity of 71.7 m/s, how far did the pack fall?
b) How long did it take for the pack to fall?

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.

Ibelieve that the correct answer is: c. along plate boundaries