In a sense, physics can be thought of as the most fundamental of the sciences, as it describes the interactions of the smallest constituents of matter. In practice, the theories of particle physics le...In a sense, physics can be thought of as the most fundamental of the sciences, as it describes the interactions of the smallest constituents of matter. In practice, the theories of particle physics lead to equations that are too difficult to solve for systems that include as many particles as a human brain. One of the key qualities required to be an effective physicist is an ability to understand how to apply a theory and develop a model to describe a phenomenon.