Physics, a branch of science, is traditionally defined as the study of

matter, energy, and the relation between them. The interaction between matter

and energy is found everywhere. In order for matter to move, it requires some

Sports show many good examples of the relationship between matter and

energy. For instance, a pitcher requires energy to throw a baseball at the

incredible speed and accuracy that is needed to keep the batter from using his

energy to try and hit the ball. The batter exhibits the need for a certain

trajectory because he/she needs to hit the ball hard enough and keep it high

enough to sail over the outfield wall. On the other hand, the

Some topics in this essay:
Physics Physics, dark matter, dark matter universe, matter energy, matter universe, hit ball, light physics, medical field,