> > why do like charges repel, and unlike charges attract?
Because one is a source, the other is a sink at the bottom of a deep ocean. Unlike charges have a Bernoulli flow between them. One is a source - the other is a sink This leads to their apparent attraction. In reality they are being repelled towards each other by the surrounding electric field. This is a Casimir class of effect. Like charges create a high pressure region between them from the inflowing field. This repels them. Likewise with the much higher pressure field of magnetism. If we were able to carry out an accurate field pressure test we would be able to tell whether the "North" pole was the sink and the "South" pole the source - or the other way around - because there must be a pressure gradient between source and sink. The housewife's vacuum cleaner does not suck up the dust. The surrounding air field blows it up. Attraction (at all scales) is simply a negation of surrounding field pressure. On Fri, 8 Jul 2022 at 07:28, Robin <[email protected]> wrote: > In reply to Vibrator !'s message of Sat, 2 Jul 2022 01:41:55 +0100: > Hi, > >> Every moving thing on the planet does the same thing. However the net > effect is > >> zero.. > > > >Reciprocity is obviously broken for effectively-reactionless > >accelerations however. > >Let me try restate the conundrum more clearly: > > > > • gravity's a mutual attraction between masses / inertias as observed > >from the zero momentum frame > > > > • from within either inertial frame it's a uniform acceleration > >(Galileo's principle) > > > > • a hovering UFO exhibiting no reaction matter is nonetheless a > >massive body in a gravity field, thus being accelerated downwards at 1 > >G like anything else > > This statement contains a couple of unproven assumptions. > 1) You don't know that's is reactionless. > 2) You don't know that it's being accelerated upward as well as being > pulled down by gravity. It may actually be > canceling the effect of gravity on the craft. After all, we don't really > know anything about the actual nature of > gravity, or any of the forces for that matter. > We have a few constants and some nice formulae, but no real understanding > of the actual nature of forces. E.g. why do > like charges repel, and unlike charges attract? > [snip] > If no one clicked on ads companies would stop paying for them. :) > >
