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 >
To calculate the normal force on an object, draw a free body diagram, determine the surface's angle, factor in the other present forces, and solve for the normal force. Note that the normal force is perpendicular to the surface the object sits on.Full Answer >
To get the mass of an object using a triple-beam balance, sum up the notch readings of the rear beam weight, middle beam weight and front beam weight. Each notch on the middle beam, rear beam and front beam represents 100-gram, 10-gram and 1-gram weight increments, respectively.Full Answer >
A bullet fired from a gun is an example of mechanical kinetic energy, while the gunpowder before firing is an example of chemical potential energy. Kinetic energy is the energy of a particle or wave in motion, while potential energy is the potential of this particle or wave to move.Full Answer >