No matter how long the slinky is, the bottom of the slinky will stay still (hover) until the top reaches it. Even if the slinky is over 1000 feet long.
This was a fantastic episode of Veritasium. Maybe the best. The recoil of a slinky, stretched under its own weight, is a pretty fantastic physics problem, especially when you capture it in super-slo-mo.
Krugman does get some things right.
Cedrico Green can’t exactly remember how many times he went back and forth to juvenile. When asked to venture a guess he says, “Maybe 30.” He was put on probation by a youth court…
I have the same white chair.
Ah, yes – xkcd timeline of when people in the United States will begin forgetting cultural epochs.
A Better Way