You have a stationary 2.2 kg block compressing a horizontal spring with a spring constant of 89 N/m by 17 cm on a perfectly smooth surface. When you release the block, it starts to move and leaves the spring at equilibrium. The block (which is no longer connected to the spring) then reaches a rough surface with a friction coefficient of 0.46. How far will the block travel on the rough patch before it comes to a full stop

One splits the atoms and molecules  the other combines them

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.

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