Going bottom-up is no problem for a boat on the underside of a levitated liquid. In a container, liquid can be levitated over a layer of gas by shaking the container up and down because the repeated, ...
Shaking a liquid fast enough allows it to levitate, and a toy boat can float on top of the levitating fluid – or upside down beneath it. When a viscous fluid like silicone oil is shaken up and down ...
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