The objectives of this chapter are to: • Mathematically describe the motion of a fluid. • Express the acceleration and vorticity of a fluid particle given the velocity components. • Describe the deformation of a fluid particle. • Classify various fluid flows. Is a flow viscous, is it turbulent, is it incompressible, is it a uniform flow? • Derive the Bernoulli equation and identify its restrictions. • Present several examples and numerous problems that demonstrate how fluid flows are described, how flows are classified, and how Bernoulli’s equation is used to estimate flow variables.