Cual es la magnitud de la suma de los momentos ejercidos por los dos pares sobre el dispositivo en forma de T que se muestra en la figura?

This is what a calorimeter is used for simpler ex, to measure calories in food.

Letter a, because when there are unlike charges they will always attract to each other.

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.