An 8.0g particle moving 1.2m/s collides with a 3.0g particle initially at rest. After the collision, each of the particles has a velocity that is directed 30 degrees from the original direction of motion of the 8.0g particle (one 30 degrees up, the other 30 degrees down). What is the speed of the 3.0g particle after the collision?

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.

The answer would be a

Inelastic is the answer your looking for.