What is the distance and displacement of a long-distance runner if they begin at the school, run 10 miles, and finish back at the school?

The displacement of the runners is 0 miles. While they have covered a distance of 10 miles, they are not "out of place" or displaced.

Explanation:

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.