An automobile engine is about 20 to 30% efficient in converting chemical energy to mechanical energy. Cells are about 39% efficient in the transformation of glucose to ATP. The rest of the energy is lost as heat. This is illustrative of the

Second Law of Thermodynamics

Explanation:

The Second Law of Thermodynamics states that the entropy, which can be defined as the state of disorder in a given system, will always increase across time. This Law poses that the processes of energy transfer, as well as those involving energy transformation, increase the entropy of the universe. As a predictable consequence, the Second Law of Thermodynamics also states that organisms (which represent thermodynamically closed systems) are in a continuous battle against the constant increase in the entropy of the universe, where energy is essentially lost in the form of heat.

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explanation:

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