One ampere is one coulomb charge passing a designated point in one second across a resistance of one ohm with a voltage potential of one volt and the energy of one Newton. As for Gravity, if one gram of matter transformed to light in a perfectly reflective sphere so long as no light escapes The sphere weighs the same. There is no reflective spheres around the stars but because light travels faster than matter then there is a lot of light at the perimeter of the Universe with the gravity it has taken with it, hence the material universe is expanding. But that’s not the whole story. A lot of weird things science hasn’t discovered yet. I have to wait for the silicone glue to dry before connecting the wires.