Anchorxiety@reddthat.com to No Stupid Questions@lemmy.world · 10 days agoIf something could rotate infinitely after being initially pushed, would the initial push disqualify it from being classed as perpetual motion?message-squaremessage-square20linkfedilinkarrow-up118arrow-down10
arrow-up118arrow-down1message-squareIf something could rotate infinitely after being initially pushed, would the initial push disqualify it from being classed as perpetual motion?Anchorxiety@reddthat.com to No Stupid Questions@lemmy.world · 10 days agomessage-square20linkfedilink
minus-squarebufalo1973@piefed.sociallinkfedilinkEnglisharrow-up1arrow-down1·7 days agoIf you think about it, when the universe cools down, maybe some rocks will fly forever without hitting anything.
minus-squarenomad@infosec.publinkfedilinkarrow-up1·7 days agoA cooled down universe does not move at all AFAIK. please Look up Brownian motion.
minus-squarebufalo1973@piefed.sociallinkfedilinkEnglisharrow-up2·6 days agoIf a rock is moving between galaxies, what would make it stop?
minus-squarenomad@infosec.publinkfedilinkarrow-up1·5 days agoDoes a given mass ever get outside the influence of both galaxy’s gravity influences?
minus-squarebufalo1973@piefed.sociallinkfedilinkEnglisharrow-up1arrow-down1·5 days agoWhy not? When two galaxies collide some rocks can get enough speed to escape.
minus-squarenomad@infosec.publinkfedilinkarrow-up1·5 days agoAFAIK galaxies don’t collide, they merge. There is usually no collision due to the massive empty spaces inbetween stars.
minus-squarebufalo1973@piefed.sociallinkfedilinkEnglisharrow-up1·4 days agoI know it’s not a “physical collision”. But the gravity “redesigns” both galaxies and some objects can be accelerated beyond the scape velocity of the galaxies combined.
If you think about it, when the universe cools down, maybe some rocks will fly forever without hitting anything.
A cooled down universe does not move at all AFAIK. please Look up Brownian motion.
If a rock is moving between galaxies, what would make it stop?
Does a given mass ever get outside the influence of both galaxy’s gravity influences?
Why not? When two galaxies collide some rocks can get enough speed to escape.
AFAIK galaxies don’t collide, they merge. There is usually no collision due to the massive empty spaces inbetween stars.
I know it’s not a “physical collision”. But the gravity “redesigns” both galaxies and some objects can be accelerated beyond the scape velocity of the galaxies combined.