6 papers
Entropy production by simple electrical circuits
E. N. Miranda, S. Nikolskaia
The entropy production by simple electrical circuits (R, RC, RL) is analyzed. It comes out that the entropy production is minimal, in agreement with a well known theorem due to Pri…
Levitation in an "almost" electrostatic field
E. N. Miranda
It is well known that a charged particle cannot be in stable equilibrium in a purely electrostatic field. The situation is different in a magnetostatic field; consequently, magneti…
Una paradoja hidrostatica
E. N. Miranda
It is shown that for a liquid in a connected vessel system, it is not possible to fulfill simultaneously Pascal's principle, mass conservation and energy conservation when the syst…
How to get mechanical work from a capacitor and two batteries
E. N. Miranda
The work done by a parallel plate capacitor is evaluated when the plate separation is changed. Two cases are considered: 1) the capacitor has a constant charge; 2) the capacitor is…
On the maximum efficiency of realistic heat engines
E. N. Miranda
In 1975, Courzon and Ahlborn studied a Carnot engine with thermal losses and got an expression for its efficiency that described better the performance of actual heat machines than…
An apparent paradox in hydrostatic
E. N. Miranda
It is shown that for a liquid in any connected vessels system, it is not possible to fulfill simultaneously Pascal's principle, mass conservation, and energy conservation. The visc…