A car is being pulled by a tow truck. The net force on the car is 3000 N and it is being pulled with an
acceleration of 2 m/s?. Calculate the mass of the car.

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A. they hold atoms  together with a molecule.its a force that exist between molecules. hope this .

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.