systems Continuum mechanics – the branch of mechanics that deals with the analysis of the kinematics and the mechanical behavior of materials modeled as a continuous mass rather than as discrete particles. Dynamics – the study of the causes of motion and changes in motion Fluid mechanics – the study of fluids and the forces on them. Fluid statics – study of fluids at rest Fluid kinematics – study of fluids in motion Fluid dynamics – study of the effect of forces on fluid motion Statics – the branch of mechanics concerned with the analysis of loads (force, torque/moment) on physical systems in static equilibrium, that is, in a state where the relative positions of subsystems do not vary over time, or where components and structures are at a constant velocity. Statistical mechanics – the branch of physics which studies any physical system that has a large number of degrees of freedom. Thermodynamics – the branch of physical science concerned with heat and its relation to other forms of energy and work. Nuclear physics – field of physics that studies the building blocks and interactions of atomic nuclei. Particle physics – the branch of physics that studies the properties and interactions of the fundamental constituents of matter and energy. Psychophysics – quantitatively investigates the relationship between physical stimuli and the sensations and perceptions they affect. Plasma physics – the study of plasma, a state of matter similar to gas in which a certain portion of the particles are ionized. Quantum physics – branch of physics dealing with physical phenomena where the action is on the order of the Planck constant. Quantum field theory - the application of quantum theory to the study of fields (systems with infinite degrees of freedom). Quantum information theory - the study of the information-processing capabilities afforded by quantum mechanics. Quantum foundations - the discipline focussing in understanding the counterintuitive aspects of the theory, including trying to find physical principles underlying them, and proposing generalisations of quantum theory. Quantum gravity - the search for an account of gravitation fully compatible with quantum theory. Relativity – theory of physics which describes the relationship between space and time. General Relativity - a geometric, non-quantum theory of gravitation. Special Relativity - a theory that describes the propagation of matter and light at high speeds. Other Agrophysics – the study of physics applied to agroecosystems Soil physics – the study