HackerLiquid Sand Hot Tub- Fluidized air bed
Mark RoberYouTube ↗
Further reading 1
Caption notes
Rober feeds air through a sand bed so its grains can rearrange. Objects float or sink in the demonstration. Comparing their weight with the upward force gives a more specific prediction than the visual resemblance to water.
Archived captions (transcription method unspecified) ↗Original passages · 2
With air on, the top surface is nearly frictionless.some stuff floats in the sand and other stuff sinks.