There are two major divisions of physics: classical and modern. Within classical physics, the major subdivisions are mechanics, thermodynamics, acoustics, optics, electricity and magnetism. The subdivisions of modern physics consist of chaos theory, relativity, string theory, cryogenics, crystallography and nanotechnology. The field also includes quantum-level, atomic, molecular, chemical, computational, high-energy, high-pressure and laser physics.Know More
Classical physics is often described as the study of physics on the macroscopic level, meaning questions are generally investigated without the aid of highly technological equipment, such as electron microscopes. The inception of classical physics dates back to the late 1500s. Mechanics is the oldest subdivision of classical physics. The field is inspired by the work of Isaac Newton.
The study of modern physics takes place at the sub-microscopic level. This division of physics investigates the behavior of very small particles, such as electrons and atoms. Modern physics developed in the early 1900s when physicists began to realize that the laws of classical physics did not always hold true for sub-microscopic particles. Notable advances in modern physics include Einstein's theories of relativity and Heisenberg's principle of indeterminacy. Because even the world's most advanced microscopes cannot make sub-microscopic particles visible, expensive tools and equipment, such as particle accelerators, are required to explore the world at this level.Learn more about Physics
The five main branches of chemistry are organic chemistry, inorganic chemistry, analytical chemistry, physical chemistry and biochemistry. Chemistry can be further divided into many sub-branches that may fall under more than one of the main branches. Some sub-branches include forensic chemistry, medicinal chemistry, materials chemistry and nuclear chemistry.Full Answer >
Physics is the most basic science because it is the science of matter, energy and their interactions. Every other hard science, such as biology and chemistry, is merely a study of a subset of physics' general purview since both biology and chemistry are ultimately the study of certain types of matter, energy and their interactions. Nonetheless, other sciences contain enough specialized information that practically speaking, they are separate.Full Answer >
A free-body diagram shows all the forces acting upon a object. Use a box to represent the object and arrows to show the direction of the various forces. The relative size of the arrows can be used to indicate the magnitude of each force.Full Answer >
A spherical capacitor consists of two hollow, concentric spheres of oppositely charged electrodes with an insulator in between them. Physicists consider Earth to be a huge spherical capacitor surrounded by the ionosphere, with a charged atmosphere that discharges electricity to the surface of the planet in the form of lightning.Full Answer >