Final answer:
A battery-powered fan starts with chemical energy from the battery, converts it into electrical energy for the motor, and finally transforms it into kinetic energy, resulting in the movement of the fan blades.
Step-by-step explanation:
A fan that is battery powered starts with chemical energy produced by the battery which is then transformed into electrical energy of the motor which lastly transforms into kinetic energy of the fan moving, resulting in work being done. In this process, the battery contains chemical potential energy that is converted into electrical energy to do work on the charge in the circuit, making it move through the motor. The electric motor in the fan then converts this electrical energy into mechanical energy by using the interaction between magnetic fields and currents to rotate a shaft. Finally, the mechanical energy is used to create the kinetic motion of the fan's blades, which circulates air and produces a cooling effect.