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...Mief fluid mechanics i lecture notes introduction historical sketch b c archimedes discovered and recorded the principles of hydrostatics flotation th centuries newton daniel bernoulli euler made greatest contributions to establishing hydrodynamics ludwig prandtl introduced boundary layer theory are theoretical mathematical e g while hydraulics is experimental chezy characteristics solids matter gases fluids liquids all compressible assumption incompressibility simplifies analysis holds true also for if pressure changes small velocity less m s air viscous have internal resistance relative motion without viscosity called ideal dimensions units four basic suffice describe mechanical processes in this course si system length metre time second o temperature kelvin k where celsius mass kilogram kg or force n definition equation xm...