This document discusses fluid dynamics and Bernoulli's equation. It introduces fluid dynamics as the study of fluid motion and forces causing flow. Bernoulli's equation relates pressure, velocity, and elevation in fluid flow. It assumes the fluid is ideal, incompressible, and flow is steady and irrotational. While useful, the equation assumes no viscosity, but real fluids are viscous. Applications of Bernoulli's equation include venturimeters, orifice meters, and piezometers to measure fluid flow.