1. The scientific study of matter, energy, force, and motion, and the way they relate to each other (takes a singular verb).
2. When used as a plural form with a plural verb: physical properties, interactions, processes, or laws; such as, "The physics of astronomy have become more important."

Physics traditionally incorporates: acoustics, mechanics, optics, electromagnetism, electromagnetism, thermodynamics; and now also includes modern disciplines; such as, quantum mechanics, relativity, cryogenics, solid-state physics, particle physics, plasma physics, and nuclear physics.

A branch of science dealing with the investigation and study of the physical phenomena of the atmosphere: Judy was very interested in geophysics and decided to take some courses in atmospheric physics to learn more about the observable occurrences or facts of the atmosphere.

A profession in the area of physics concerned with the scientific structures of the atom, the characteristics of the electrons and other elementary particles of which the atom is composed, the arrangement of the atom's energy states, and the processes involved in the radiation of light and x-rays.

In ancient astronomy, the word cosmical means "occurring at sunrise", and designates the rising, or setting, of the stars at that time: Cosmical physics is a term broadly applied to the totality of those branches of science which consider the phenomena of the cosmos, or universe, and their explanations by the laws of physics.

Cosmical physics includes geomagnetism, seismology, the tides, meteorology as related to cosmical causes, the aurora, meteoric phenomena, and the physical constitution of the heavenly bodies generally.