Final answer:
In physics, the total distance a baseball player covers after hitting a home run is the sum of four times the distance between bases, while the displacement, being a vector quantity, is zero since the start and end points are the same.
Step-by-step explanation:
The student's question involves the concept of displacement and total distance covered, which are key concepts in Physics related to motion and vectors. When a baseball player hits a home run and rounds the bases, the total distance is the sum of the distances between each base. With a distance of 27.4m between bases in a baseball diamond, the player will cover 27.4m x 4 = 109.6m in total. However, the displacement is a vector quantity that measures the shortest path from the initial to the final position, and in this case, since he ends up where he started, the displacement is 0m.