Final answer:
A steam engine that moves a train obeys the laws of conservation of energy by converting heat energy into motion energy.
Step-by-step explanation:
A steam engine that moves a train obeys the laws of conservation of energy.
According to the law of conservation of energy, energy cannot be created or destroyed but can be transformed from one type to another. In the case of a steam engine, the hot steam produced through the combustion of coal in the boiler is used to drive the movement of a piston. This conversion of heat energy into motion energy allows the steam engine to do work in moving the train.
By utilizing the energy transfer from heat to mechanical energy, the steam engine complies with the principle of conservation of energy.