explain the energy transfer that occurs between the fan, the windmill, and the weight beginning when the fan is turned on after it is turned off

A wind turbine transforms the mechanical energy of wind into electrical energy. A turbine takes the kinetic energy of a moving fluid, air in this case, and converts it to a rotary motion. As wind moves past the blades of a wind turbine, it moves or rotates the blades. These blades turn a generator

pecialized keyboards

conservation of mass

mass before something happens = mass afterwards