dQdx
dQdx refers to the partial derivative of heat transfer with respect to the x-coordinate. In physics and engineering, heat transfer is often described by differential equations, and dQdx is a term that appears in these equations. It represents the rate at which heat is flowing out of a unit volume or across a unit area in the x-direction. More precisely, it quantifies how the heat flow changes as you move along the x-axis.
This concept is fundamental in the study of heat conduction, a process where heat energy is transferred