Chen explained that heat engines illustrate only the second law of thermodynamics because they involve the flow of thermal energy from hot to cool areas. his friend mia disagreed and explained that these engines illustrate only the first law of thermodynamics because they are sometimes 100 percent efficient if they conserve enough energy. which statement best explains who is incorrect? a. chen is incorrect because heat engines illustrate only the first law of thermodynamics. b. chen is incorrect because in heat engines thermal energy flows from cool to warm areas. c. mia is incorrect because heat engines illustrate only the second law of thermodynamics. d. mia is incorrect because machines and engines can never be 100 percent efficient.

(D) Mia is incorrect because machines and engines can never be 100 percent efficient.

If we talk about idea situation then machines have an efficiency of 100%, because there is no power loss. But in real devices, they will always have efficiency less than 100% because rigid and friction-less systems do not exist in reality. The power losses in a transmission or mechanism are eventually dissipated as heat. Therefore heat machines can never have the efficiency equal to 100% so on the basis of this fact Mia is incorrect.

The correct answer is D. Mia is incorrect because machines and engines can never be 100 percent efficient.

Explanation:

In physics, thermal energy refers to the energy produced by inner temperature or by the transference of heat, this is explained through different laws related to thermodynamics. In the case of heat engines that convert heat to mechanical energy, there is a transference of heat from hot to cool areas and this implies thermal energy is not conserved but changes or is lost which is related to entropy and the second law of thermodynamics. According to this Mia's statement is incorrect because these machines are not completely efficient, and therefore energy would not be conserved.

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