It's always interesting to recall how early science fiction predictions about the future look like. However, we do not yet have a flying car that we can purchase, and we have not been able to make contact with extraterrestrial smart life, let alone discover any extraterrestrial life. Functional robots also work in the factory as robot arms rather than as our housekeepers, and our displays are only starting to be slightly better than high-definition and do not realize full holographic projection. Our civilized progress, of course, will not be as conjectured as science fiction had in our early years. We carry a super-powerful notebook with us, we can almost reproduce anything in the movie, and you can set dinner by phone in the restaurant. Now that we are eroding the predictions for the future of ancient science fiction, scientists have successfully used sounds to float objects. This technology can't float anything other than very tiny objects, so you don't have to worry about super bad guys using this technology to put the National Monument into the sea. In the sound pressure node, the ultrasonic standing wave can cancel out with the gravity so that those tiny lightweight objects can move around by moving the sound wave. The video taken by the researchers demonstrates this phenomenon. Although it is sometimes difficult to identify, white tiny particles do float freely in the air. Of course, this technology has not yet achieved true practical application, and it will take a long time to implement any possible practical application. The energy required for floating furniture must also be much greater than the energy of floating small white particles. Carbide Conical Button,Carbide Mining Button,Tapered Carbide Buttons,Tungsten Carbide Conical Button Zhuzhou Kerui Cemented Carbide Co., Ltd. , https://www.carbide-china.com