500
These are all of the energy transformations involved at a power plant from (1) burning coal to heating water to (2) turning a turbine to (3)turning a generator to (4)producing usable power for power lines.
What is (1) chemical to thermal (burn coal), (2)thermal to mechanical (turn turbine), (3)mechanical to mechanical (turbine turns generator), (4)mechanical to electrical (generator wire releasing electrons)