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Devilishly clever.
So the floating equilibrium on the bottom surface is actually unstable based on static potential energy alone (Fig 3B). The stability comes from dynamic effects of the oscillation, which take like 5 pages of supplementary text to explain.Motore said:Here is the accompanying article:
https://arxiv.org/abs/2003.04777
Upside down buoyancy refers to the phenomenon where an object or substance that is normally less dense than the surrounding fluid experiences an upward force instead of the expected downward force.
Upside down buoyancy can occur when the density of the object or substance is not uniform, causing it to have a higher density in certain areas. This can lead to the object or substance being more dense than the surrounding fluid and experiencing an upward force.
One example of upside down buoyancy is the "upside down water experiment," where a glass filled with water is placed in a larger container filled with oil. Due to the difference in density between oil and water, the water stays at the bottom of the glass, creating an upside down buoyancy effect.
Upside down buoyancy is not a common occurrence in everyday life. It is often observed in laboratory settings or in specific experiments designed to demonstrate this phenomenon.
Upside down buoyancy has applications in various fields such as materials science, where it can be used to create lightweight yet strong materials, and in marine engineering, where it can be used to design ships and other structures that can float in a stable manner.