Engineering equations are mathematical expressions that describe the relationships between different physical quantities in engineering and science. These equations help engineers analyze systems, design structures, and solve problems by providing a framework for understanding how variables interact. Common examples include the Newton's second law of motion and the Bernoulli equation for fluid dynamics. These equations can vary in complexity, from simple algebraic formulas to intricate differential equations. They are essential tools in various fields, including mechanical engineering, civil engineering, and electrical engineering, enabling professionals to predict outcomes and optimize designs effectively.