An electric fan is plugged into an outlet and the circuit completed, making the fan blades spin. Which of the following correctly describes this situation?
Electrical energy is transformed into mechanical energy.
Electrical energy is destroyed, and mechanical energy is created.
Mechanical energy is transformed into electrical energy.
Mechanical energy is destroyed, and electrical energy is created.
4 answers
The correct description of the situation is: Electrical energy is transformed into mechanical energy. When electric current flows into the electric motor of the fan, it creates a magnetic field that causes the motor to rotate, which in turn rotates the blades of the fan. The electrical energy is converted into kinetic energy, which makes the fan blades spin, resulting in the production of mechanical energy.
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Question A woman runs as shown. What main energy conversion occurs?
What main energy conversion occurs? (1 point) Responses Thermal energy changes into mechanical energy because heat provides energy for motion. Thermal energy changes into mechanical energy because heat provides energy for motion. Chemical energy changes into mechanical energy because energy from digestion of food provides energy for the runner’s motion. Chemical energy changes into mechanical energy because energy from digestion of food provides energy for the runner’s motion. Mechanical energy changes into thermal energy because the energy from motion creates heat in the air around the runner. Mechanical energy changes into thermal energy because the energy from motion creates heat in the air around the runner. Mechanical energy changes into chemical energy as the kinetic energy from motion creates reactions in the surrounding air.