Question

set up a cyclist - generator - cfl configuration. the cfl is the light bulb to the right of the incandescent light bulb. with the cyclist pedaling, observe the path taken by the energy icons. why is the transformation of energy not 100% efficient? the cfl does not start shining immediately after the cyclist starts pedaling. some of the cyclists energy turns into thermal energy. the cyclists energy needs to be replenished constantly. the wheel in the generator cannot run on its own.

Explanation:

Energy transformation is never 100% efficient due to energy losses. In this case, some of the cyclist's mechanical energy is converted to thermal energy through friction in the generator and other components, reducing the amount of energy available to light the CFL.

Answer:

Some of the cyclist's energy turns into thermal energy.