DENJIRO: I made a loud noise using a whip. Many of you might assume that I made this sound by hitting the ground with the whip, but that is incorrect.
This is a device that can allow you to see sound. It uses a concave mirror and a high-speed camera. Let's see what happens when I pop a balloon in front of the concave mirror.
When the balloon popped, there were waves spreading outward from the balloon. That's actually what sound is. So what happens when I use a whip? Looking at the video, you can see that the tip of the whip accelerates and turns. The tip is traveling faster than the speed of sound at this point. When this occurs, air gets compressed and becomes visible as a shadow. This is sound. Once the compressed air spreads out at once, it creates a cracking sound.
The secret of the tip travelling so quickly lies in the structure of the whip. As you get to the tip, it gets thinner and lighter. This is the key. By gradually making the whip lighter, it will make it easier for the kinetic force of the swinging motion to travel to the tip of the whip. As a result, the energy is concentrated at the tip, allowing it to travel faster than sound.
The way you swing the whip is important as well. By creating a loop, you will be able to move just the tip very quickly and create the loud noise.
Whips are becoming popular as a sport these days.
I hope energy will bring you all happiness. Our magic word is "Happy Energy!"
Негізгі бет A Whip Moves Faster than the Speed of Sound?! / Mr. Denjiro's Happy Energy!
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