What is the acceleration experience by a car that takes 10 seconds to reach 27m/s from rest?

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.

Two cars collide, lock bumpers and move together after the collision.this collision is known as perfectly inelastic collision.