The study of the universe including how the universe began and how stars and galaxies form, age, and die. Many of the other sciences overlap physics. For example, geology uses acoustical physics, fluid physics, and space and planetary physics to study the structure and dynamics of the earth. Many parts of biology, chemistry, and engineering use physics. Physicists may work in a laboratory designing materials for the computer chips of tomorrow, or smashing subatomic particles against one another to understand how the universe began.
Physicists design and make instruments that diagnose and cure diseases.
They work to develop safer and cleaner sources of energy, and to harnes the power of the sea, wind, and sun. Research physicists work in both industry and government, in laboratories and hospitals, and on university campuses. Even the most recent Nobel Prize in economics was awarded to a physicist in recognition of the mathematical model he developed to better describe modern economics. In short, physicists work in many scientific and technical fields because physics is used in almost every aspect of scientific work.