This thermodynamic conjugate of volume is equally transmitted throughout a static incompressible fluid by Pascal's principle, and is proportional to moles time temperature over volume according to the ideal gas law.
In an isentropic flow, the gradient of the enthalpy equals the inverse of the density times the gradient in this quantity. A form of this quantity originating from a blackbody is given by one-third times the radiation density, and in general, a form of this quantity arising from electromagnetic interactions is given by the flux divided by the speed of light. The derivative of temperature with respect to volume at constant entropy equals the negative derivative of this quantity with respect to entropy at constant volume via the Maxwell relations. This thermodynamic conjugate of volume is equally transmitted throughout a static incompressible fluid by Pascal's principle, and is proportional to moles time temperature over volume according to the ideal gas law. For 10 points, name this physical quantity of force per unit area.
In an isentropic flow, the gradient of the enthalpy equals the inverse of the density times the gradient in this quantity.
pressure