Spinning wind turbine blades have kinetic energy. Wind turbines transform this energy into electric energy and heat energy in a closed sytem. Which of the following statements about this energy transformation is true? A. All of the heat energy is transformed into electric energy. B. Half of the kinetic energy is transformed into electric energy and heat energy. C. All of the kinetic energy is transformed into electric energy and heat energy. D. Half of the heat energy is transformed into electric energy.

Question

Yoselin Herman

Physics

30 September, 14:45

Spinning wind turbine blades have kinetic energy. Wind turbines transform this energy into electric energy and heat energy in a closed sytem. Which of the following statements about this energy transformation is true? A. All of the heat energy is transformed into electric energy. B. Half of the kinetic energy is transformed into electric energy and heat energy. C. All of the kinetic energy is transformed into electric energy and heat energy. D. Half of the heat energy is transformed into electric energy.

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Answers (1)

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Chandler Reeves · Answer 1

C. All the kinetic energy must be transformed into electric and heat energy since this is a closed system (the 2nd sentence tells us this). We don't know the fraction of heat to electric energy but all of the kinetic changes into these two types of energy.