Recent content by Kahlua

I like to think of energy in relation to Noether's theorem. Her theorem states that any differentiable symmetry of the action has a corresponding conservation law (or conserved current). Symmetries of space and time correspond to conservation of linear momentum and conservation of energy. This...

Can permanent magnets be modeled as set of "magnetic charges"? Computing the full magnetic field of a permanent magnet and what forces two permenant magnets exert on each other is obviously a field theoretic problem that requires a solve using e.g. a FEA method or simular. For two idealized...

I'm interested which book you read that in. Anyway, several of the answers point out when it can happen: 1. On a nuclear level, the nuclear forces overcome the electromagnetic forces on short distances. Equal charges still repel but this force is then small compared to the the attractive nuclear...