This chapter applied energy conservation to steady-state flow systems, focusing on energy density and gradients in fluid flow and circuits. We expanded to the Linear Transport Model for processes like...This chapter applied energy conservation to steady-state flow systems, focusing on energy density and gradients in fluid flow and circuits. We expanded to the Linear Transport Model for processes like diffusion, driven by gradients. Lastly, we introduced the Exponential Change Model for systems approaching equilibrium over time. The chapter emphasizes understanding relationships behind symbols, preparing for advanced applications in varied transport phenomena.