text: This physicist developed a method of "reciprocal figures" for analyzing whether structures are statically indeterminate.
full_question: This physicist developed a method of "reciprocal figures" for analyzing whether structures are statically indeterminate. Along with Josef Stefan, this physicist names a model of diffusion, and he names several laws of thermodynamics about the mixed partial derivatives of thermodynamic potentials. He is the second alphabetical namesake of a distribution which gives the (*) speeds of particles in an ideal gas in equilibrium. This physicist developed a set of equations which can be used to calculate the speed of electromagnetic wave propagation. For ten points, name this physicist who names a "demon" which seemingly violates the Second Law of Thermodynamics as well as the set of four equations which govern electromagnetism.
first_sentence: This physicist developed a method of "reciprocal figures" for analyzing whether structures are statically indeterminate.