Scientists have turned the world upside down with an intriguing feat of physics that allows their toy boats to float in the wrong direction under the bottom of a liquid.
In one of the most interesting demonstrations of the mind-bending effect, boats seem to be rejecting the law of gravity by pointing downwards and sinking above the water above them.
The bizarre phenomenon formed the Nifty’s strategy, but researchers say it could have practical consequences from the processing of minerals to the separation of waste and pollutants from water and other liquids.
“We were playing around,” said Emmanuel Fort, a researcher on the team that discovered the impact of the Department of Art Materials and Chemistry at a high school in Paris. “We had no idea it would work.”
Scientists have studied the vibrations of curious effects on fluid behavior. The researchers already knew that the right kind of vibration could cause bubbles to sink to the bottom in liquids, but heavier particles that usually float to the surface instead.
Another amazing effect of vibration is that a layer of liquid floats in the air, but it stays in a closed container. The explanation provided is otherwise unstable systems that have the power of vibrations to stabilize.
If a current-carrying container is swept away quickly, the liquid will come down. The liquid, however, does not fall at once. Instead, the droplets first form on the underside of the liquid which induces the collapse of the rest of the liquid.
However set the container on a vibrating plate and the liquid can behave very differently. The vertical vibration at the right frequency prevents the eruption. Without these the liquid remains immobile: instead of falling it remains stationary in the air cushion.
It was known long ago. What Fort and his colleagues showed is that objects can feel the “anxiety” effect and float beneath the lifted liquid. Written in nature, they display it with small toy boats floating on layers of glycerol and silicone oil.
Several forces kept the boats. The first comes from the air pressure, which is raised by the weight of the liquid above and pushes the boat into the water. But the liquid pushes itself back into the boat, a force that lowers the level even higher. Gravity also pulls the boat down. It all creates a fine balance that can be detached at any moment, if not for vibration.
“If you put the boat in the air, it will fall and if you go up, it will go to the interface. The whole strategy is not to make the situation possible in the first place, but to stabilize the imbalance, ”Fort said.
Researchers believe the work opens up new avenues for study and suspect that the effect may be effective for industrial processes such as removing plastic particles from liquids, but for now, scientists are only enjoying the strange effect.
“The funny thing is that it creates a reaction from people who aren’t scientific,” Fort said. “People say it’s like a Caribbean pirate scene when the boat floats in the opposite direction. It’s counter. It talks to people about science fiction and fantasy and it’s so beautiful. “
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