From the Ri Channel‘s View the Tales from the Prep Room series, this is how you make a fluidized bed of sand: Making Sand Swim with Ri Demo Technician Andy Marmery. Watch how these solids suddenly behave a lot like a fluid as air escapes between the sand particles, causing them to float.
Aided by a troop of floating objects Andy dusts off the fluidised bed, a classic piece of Ri demonstration kit handed down from the 1950s.
It’s definitely one of the more strange and fascinating demonstrations that we’ve seen.
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