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Hoberman spheres start off small and grow hugely when pulled
open. If made small enough and encased in water soluble
spheres, they could become a water-sensitive powder
consisting of spring-loaded spheres. On immersion in water,
the coating dissolves and the spheres spring open, causing an
enormous increase in volume. Could be used to mop up spills
quickly or to provide suction.
||How would the opening up of the spheres cause the water to be absorbed? and into what?
||As something increases in size, it sucks things in, like
a fish opening its mouth.
||oh you mean vacuum.
in that case you need to add an internal flexible bag that has a hole in it.
||No you don't, every grain is small enough to hold a drop or more.