(Summary description)

The reason for the loud tearing of plastic bags? Today we will explain to you, or is it just because the sound of plastic bags is particularly easy to feel? Is it the characteristics of the plastic bag itself? How do you explain it?

Sound is produced by vibration, depending on the magnitude of the vibration intensity, which is the energy released during this size process, and the conversion of energy is obviously what people work for. Compare the difference between the plastic bag and the table. The plastic bag is very light. It is obvious that you will change the shape (including yourself) by more substantial movements, according to the work of x = force displacement (W = F(S) work It should be a larger process. When you knock on the table, there is only a small deformation, and the displacement is zero. When the power naturally comes to do this work. Of course, there is a process of transforming into other energy, but in general it is not very large.

Sound is the shape of an object. It compresses air, changes its local density, and transmits it to the ear through a waveform. And mastering to ask why plastic bags make a lot of sound, and I know that I can make the following explanations: 1. The plastic bags we use every day are mainly PE or PVC film, which is very flexible, and plastic bags are microscopic. Energy needs to change configuration and conformation is low; and because of its membrane shape, even children have the power to pinch it. When a person touches a plastic bag lightly, it is strong enough to change the structure of the polymer chains in the plastic bag. 2. The polymer chain is very small. The number of plastic bags that this macroscopic object can reach. When a part of the plastic deformation occurs, including a large number of polymer chain deformations, the squeezing of the surrounding air is enough for the ears to hear To the sound.