Anchorxiety@reddthat.com to No Stupid Questions@lemmy.world · 6 days agoIf something could rotate infinitely after being initially pushed, would the initial push disqualify it from being classed as perpetual motion?message-squaremessage-square20fedilinkarrow-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 · 6 days agomessage-square20fedilink
minus-squarebufalo1973@piefed.sociallinkfedilinkEnglisharrow-up1arrow-down1·1 day agoWhy not? When two galaxies collide some rocks can get enough speed to escape.
minus-squarenomad@infosec.publinkfedilinkarrow-up1·22 hours agoAFAIK galaxies don’t collide, they merge. There is usually no collision due to the massive empty spaces inbetween stars.
minus-squarebufalo1973@piefed.sociallinkfedilinkEnglisharrow-up1·17 hours 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.
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.