Emphasizing a practical approach for engineers and scientists, this text avoids overly theoretical explanations and shows readers how differential equations are derived by applying basic physical principles and experimental observations to engineering systems. This resource also covers classical methods for obtaining the analytical solution of differential equations and Laplace transforms. In addition, the authors discuss how these equations describe mathematical systems and how to use software to solve sets of equations in which analytical solutions cannot be determined. Numerical values are provided in all examples and problems.