Prove Eq. 5.78, using Eqs. 5.63, 5.76, and 5.77.

Chapter 5, Problem 33P

(choose chapter or problem)

Problem 33P

Prove Eq. 5.78, using Eqs. 5.63, 5.76, and 5.77. [Suggestion: I’d set up Cartesian coordinates at the surface, with z perpendicular to the surface and x parallel to the current.]

Reference equation 5.78,

Reference equation 5.63,

Reference equation 5.76,

Reference equation 5.77

A above = Abelow,