by batmanmg » Mon Sep 04, 2006 6:40 am
wich part, or all of it?
if we assume the universe has existed forever and will exist forever, then it in itself is a perpetual motion device, its not using any external power, and its not waisting any either.
now you have a closed circut. kinduf like a food web in an isolated eco system. You know where you have animal eating plants, and animals eating other animals, blah blah blah, the circle of life. in almost all circumstances, if you take one/some of those creatures/plants/things away to say start your own separate ecosysteme (meaning it doesn't give anything back to the original ecosystem), then something else is likely to starve. the ecosysteme won't have all the parts it needs to sustain itself, and so eventualy it collapses becuase the animal that ate it isn't getting fed and it thins out, cuasing more animals to thin out, and they all eventualy die. (closed ecosystem here, no migrating and no rapid evolution)
now replace each of those animals with different energies. (i don't really know energy types so i'll list physics stuff anyway) kenetic, potential, blah blah blah, the balanced equations of the physical universe. the same logic applys. if you take parts of the chain reaction away (it doesn't give back anything to the universe) then the universe will analogisly starve. it might not end this time around this big bang cycle (or the next billion, but it will create a tapering off of the universes life.
luckily, all mankind has been able to come up with, are none perpetual motion devices, the energy put in them, and the energy that cuases them to be in motion is eventualy dispersed into the universe. like how friction cuases a pendulum to slow down/stop, that is turned into heat (right? or is that only with solid object friction?) that heat makes the air around the pendulum expand, and so on into the oblivion of space.
was that easier to follow, or did the food web throw you totaly off?
the only way to not cuase the eventual end of the universe, you would have to use parts of the grand equations of the universe that don't matter to the rest of it... like taking away little critters that didn't really have all that much of an integral part in the whole web. i can't think of a good example. i can't think of any type of engergy that doesn't have an integral part in the workings of the rest of the universe. so until one's thought of, then im pretty sure a ppm device is a bad idea.. i like our universe, i don't want it to die.