Question

In a coal-fired power plant, which sequence correctly shows the energy changes that turn coal into electricity?
(1 point)
Mechanical energy becomes thermal energy, then chemical energy, then electrical energy.
Thermal energy becomes chemical energy, then electrical energy, then mechanical energy.
Electrical energy becomes mechanical energy, then thermal energy, then chemical energy.
Chemical energy becomes thermal energy, then mechanical energy, then electrical energy.

Answer 1

Chemical energy becomes thermal energy, then mechanical energy, then electrical energy.

(Combustion of coal releases chemical → thermal; steam converts thermal → mechanical in the turbine; the generator converts mechanical → electrical.)