In reply to ChemE Stewart's message of Sun, 19 Aug 2012 18:46:51 -0400: Hi, [snip]
1) Very small black holes are much smaller than atoms. The mostly fall straight through. 2) Upon giving this some further thought, it occurred to me that a charged back hole won't remain charged for very long. Assume for a moment that a small neutral black hole swallows a proton. It acquires a positive charge. That positive charge will tend to *repel* other protons, and *attract* electrons, so it is very likely that the charge will soon be neutralized by an electron. In short this mechanism ensures that black holes essentially remain neutral. (There is also the possibility that, once swallowed the charge is either annihilated, or disappears forever behind the time barrier that is the Schwarzschild radius.) 3) I suggest you calculate the "pressure" that a small black hole would exert on solid matter due to gravitational forces (i.e. gravitational force/cross sectional area of black hole), and compare this to the compression strength of solid matter (see e.g. http://www.engineeringtoolbox.com/compression-tension-strength-d_1352.html). It's not going to be swayed by thermal currents. 4) If the hole is neutral, it won't be affected by magnetic fields. 5) At the core of the Earth, it is not "safetly away from life". It is sitting there consuming the planet from the inside out, growing *exponentially* in mass as it does so, until there is no more planet left. >Mark, > >I absolutely agree that they will want to fall to earth, i just do not >agree that micro black holes will necessarily zoom directly thru the earth. > At 23 micrograms, about like a grain of sand, the smallest predicted mass >of one at a planck length, I more pictured it acting like ball lighting >while it is in the air. In addition to the acceleration due to gravity, i >envisioned it might be also be subject to thermal currents and magnetic >fields causing it to drift some on its way down. I envisioned it might get >lodged in matter such as rocks and metal lattices in the ground. Over time >it should make its way to the center, triggering local fusion and fission >reactions in local matter on its way to the core, safetly away from life. > >I think the only safe place for this stuff might be the center of the >earth. 1/3 of the heat at the center of the earth is thought to be from >radiation of some kind. Jupiter and Saturn are also thought to have >something generating excess heat at their core. Regards, Robin van Spaandonk http://rvanspaa.freehostia.com/project.html
