Question: An entrepreneur claims to have devised a system for extracting thermal energy from the wind by cooling it. His device lowers the temperature of the

An entrepreneur claims to have devised a system for extracting thermal energy from the wind by cooling it. His device lowers the temperature of the air that passes through it by 1 ^◦C. He claims to generate 800 W/m² from air flowing at 1 m/s. Does this device conserve energy? Would you invest money in the entrepreneur’s scheme?

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