Question

Electrical energy is used to turn the blades of a fan. The amount of energy transformed is seen here: 750 J electrical energy is transformed into 400 J kinetic or mechanical energy. What happened to the remaining 350 J of energy? A) It was lost due to friction. B) It was transformed into 350 J of heat energy. C) It was destroyed by the rotating blades of the fan. D) It was never used and therefore was not transformed.

Answer 1

B) It was transformed into 350 J of heat energy.

Explanation:

The remaining 350J of energy must have been transformed into 350J of heat energy.

A fan works by converting electrical energy into heat energy.

• According to the third law of thermodynamics "no system is 100% efficient". The conversion of the energy from one form to another involves a lost in energy.
• Heat is one very familiar way by which energy can be lost.
• Some component energy is used to heat the fan in the process and it is a wasted energy.
• Friction surfaces a heat energy in this process.

learn more:

Third law of thermodynamics brainly.com/question/3564634

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