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Acoustic equations refer to a set of mathematical equations that describe the propagation of sound waves through a medium, such as air, water, or solids. These equations are fundamental in the field of acoustics, which studies sound wave generation, propagation, and interaction with various materials.

Fluid dynamics is the study of the behavior of fluids (liquids and gases) in motion. The equations that govern fluid dynamics describe how fluids flow and how they interact with forces and boundaries. The main equations governing fluid dynamics are derived from the principles of fluid mechanics and encompass several fundamental concepts, including conservation of mass, momentum, and energy. Here are the key equations in fluid dynamics: 1. **Continuity Equation**: This equation is based on the principle of conservation of mass.

Plasma physics encompasses a wide range of phenomena involving ionized gases (plasmas), which are composed of charged particles including ions and electrons. The behavior of plasmas is governed by a set of equations that describe how these charged particles interact with electromagnetic fields and with each other. Here are some fundamental equations and concepts relevant to plasma physics: 1. **Fluid Equations (Magnetohydrodynamics - MHD)**: - **Continuity Equation**: Describes the conservation of mass.

Maxwell's equations are a set of four fundamental equations in classical electromagnetism that describe how electric and magnetic fields interact and propagate. They form the foundation of electromagnetic theory and are essential for understanding various physical phenomena, from basic electricity and magnetism to light and radio waves.