An electric heating element is connected to a 110 v circuit and a current of 3.2 a is flowing through the element. how much energy is used up during a period of 5 hours by the element

Energy, E is given by =  IVt

Where E is Energy in Juoles.
I is Current in Amperes,
t is time in seconds,

I = 3.2 A,    V = 110 V,    t = 5 hours = 5 *3600 seconds.  1 hour = 3600s

E =  3.2 * 110 * 5 * 3600

E = 6 336 000 Juoles

E = 6.336 * 10^6 J  =  6.336 MJ

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.

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