Thermodynamics: Fluid Statics

This lecture covers the basics of fluid statics in thermodynamics, focusing on the definition of pressure in a fluid at rest, compressibility, and the fundamental relation of fluid statics. It also discusses the forces acting on a parallelepiped volume element, the resultant pressure forces on its six facets, and the three forms of the fundamental relation of fluid statics. Additionally, it explores the special case of a fluid in a gravitational field, the characteristics of incompressible and compressible fluids, and the coefficients of isothermal and isentropic compressibility. The lecture concludes by emphasizing the scalar nature of pressure, the compressibility of fluids, and the general form of the fundamental relation of fluid statics.