Recent content by darkrystal

First things first: thanks for your quick reply! Now, my system is actually composed of both the block and the plane (indeed, the term F dx vanishes in the total entropy formula because there is an equal term -F dx in the expression for the differential variation of entropy of the plane). For...

Something strange showed up while I was thinking about the following problem: I'd like to prove, by the only mean of the principle of maximum entropy, that the thermodynamic destiny of a block sliding on an infinite horizontal plane is to stop and come to thermal equilibrium with the plane...

I'll write it in a bit more detail. Let's take the flux across a ring (x to x+dx). The distance of every point of this ring from the two charges is the same, so the electric field must be the same on the whole ring. We get this field by multiplying by 2 the y-component of the field generated by...

Homework Statement In a xy-plane, we have a +q charge in A(0,h) and a -q charge in B(0,-h). Let's take a field line passing through A, that has horizontal slope in A. Find the point C(m,0) where this field line intersects the X axis. Homework Equations I think Gauss' law \epsilon_0...