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Physical science includes the sub-branches of aerodynamics, astronomy and astrophysics, classical mechanics, civil engineering, electrical engineering, energy, geography, geology, mechanical engineering, physical chemistry, statistical mechanicsStatistical mechanics is the application of statistics, which includes mathematical tools for dealing with large populations, to the field of mechanics, which is concerned with the motion of particles or objects when subjected to a force. It provides a fr, thermodynamicsThermodynamics is the physics of energy, heat, work, entropy and the spontaneity of processes. Thermodynamics is closely related to statistical mechanics from which many thermodynamic relationships can be derived. While dealing with processes in which sys, quantum mechanicswavefunctions of an electron in a hydrogen atom possessing definite energy (increasing downward: n 1,2,3,. and angular momentum (increasing across: s p d . Brighter areas correspond to higher probability density for a position measurement. The angular mom. Sometimes mathematicsMathematics is commonly defined as the study of patterns of structure, change, and space; more informally, one might say it is the study of "figures and numbers". In the formalist view, it is the investigation of axiomatically defined abstract structures is also included, though more commonly it is considered a separate science or theoretical practice, more akin to philosophyPhilosophy literally means 'love of wisdom' from the Greek 'philo' and 'sofia'. It is now widely used to designate the pursuit of knowledge or wisdom about fundamental matters concerning life, death, meaning, reality, being and truth. The term may also re. There also exist fields such as biomechanicsBiomechanics is the study of the mechanics and other physical aspects of living organisms and their parts. Some simple examples of biomechanics include the investigation of the forces that act on limbs, the aerodynamics of bird and insect flight, the hydr, biochemistryBiochemistry is the chemistry of life. Biochemists study the elements, compounds and chemical reactions that are controlled by enzymes and take place in all living organisms. Biochemistry is focused on the structure and function of cellular components, su, and geneticsGenetics is the science of genes, heredity, and the variation of organisms. Humans began applying knowledge of genetics in prehistory with the domestication and breeding of plants and animals. In modern research, genetics provides important tools in the i, which span the gap between the physical and biological sciences.