I thought this might be interesting if not a little humorous to explore for about 2 seconds. I'll leave it up to the mods to work out whether to keep in physics and math or send it to the great pool in the sky....Please Register or Log in to view the hidden image! Scenario: We have a universe with only one object of mass in it. The object is able to utilise it's own mass to fuel it's acceleration in a void of vacuum with out any other reference to gain an idea of velocity acheived. So this object cuts itself in half and uses the mass of one half to fuel it's accelleration . When the fuel is fully consumed the object is half the mass and for all intents and purposes still sitting in a vaccum stationary [ no other reference to note velocity]. [ however G forces are evidence of acceleration] The object repeats the operation again and again until finally...... it what? disappears or keeps going eternally reducing itself by half? and what's the story about energy conservation? Energy is being expended but appears not to be conserved as velocity gained is not relevant in a void of nothingness except vacuum. I get the idea that by the time it has used all it's mass it's velocity must be 'c' and effectively massless however the energy expended to get to 'c' would to me in my naivity indicate that it would not only be massless but void of energy as well...thus the universe in question returns to oblivion from whenst it came even if it is traveling at 'c' doing it.... any thoughts, ridicule, ideas most welcome... especially if there is a better way to show this little puzzle.