https://www.sciencealert.com/images/2018-09/acoustic-levitation-bubble_1024.gif
Building a bubble out of a floating drop of liquid may sound like weird sci-fi, but that's exactly what physicists...
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https://www.sciencealert.com/images/2018-09/acoustic-levitation-bubble_1024.gif
Building a bubble out of a floating drop of liquid may sound like weird sci-fi, but that's exactly what physicists...