Now count of three, we will tear it off. Okay, one, two, three. Notice something, another sound. Now the question is, why sound came? Okay. Definitely there is a sound wave. The one between the paper you broke the bomb, there is a... Okay, so she is saying that when you break the bomb, sound should come. Now let us understand what is sound. Disturbing, so it is a disturbance in water. In here? In here? There is a disturbance in the air. The paper is causing the disturbance in here. If I would have dipped this paper in water and then... No, no, no, no. Then sound will come and not... Let us look at it. They will come and get it. Some people are going to... Let us look at it. No sound. No sound. So... So... That's a now tell me how the paper is created. What? What? Then what is the bulb? It is actually good. And how the wood is formed? Like if you look at the microscope, what it is? If I look through the microscope, it is a collection of a lot of fibers. And when the fibers have broken, they can vibrate freely. That vibration creates a vibration to care. And when we write it, there is a hydrogen bond between the water molecules. It doesn't let it vibrate very easily.