Halla la profundidad a la que se encuentra sumergido un barco en el océano Atlántico si el tiempo que tarda la reflejarse la onda sonora en un sonar es de 1.750 s V del sonido 1530 m/s

The independent variable would be the fertilizer as it is what the dependent variable (the growth of grass) depends on.

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.

Velocity is the speed of an object in a certain direction so you'd need to know speed and direction