Why do plastic bags ( PE bag) Tearing sound great

plastic tearing sound big reason? Today we are going to explain for everybody, or just because the voice of the plastic bags especially easy to feel? Is one of the characteristics of the plastic itself? How do you explain? Compound bag

sound is produced by the vibration, depends on the size of the vibration strength, this is the energy released during the process of this size, and transformation of energy is obviously people work for it. Plastic bags and table compares the differences between the plastic bag is very light, it is obvious you when he will exercise more substantive change shape ( Including yourself) (displacement, according to the work of x = force. W = F( S) Work should be a bigger process, when you knock on the table only small deformation, displacement is zero, when power of nature to do the work. Of course, there is a process which is converted into other energy, but in general it is not very big.

sound is the shape of the object, compressed air, it changed its local density, and the transmitted waveform to the ear. And the voice of the master asked why there is a big plastic bags, light touch with thin, I know you can make the following explanation: 1, the plastic bags we use everyday is mainly PE or PVC film, its flexibility is very high, need to change the plastic bags in the micro energy configuration and conformation; And because of its membrane, even the children all have the strength to knead it. When a man gently touch a plastic bag, it's strong enough to change the structure of the polymer chains in the plastic bag. 2, the polymer chains are very small, and the macroscopic object can achieve the number of plastic bags, as a part of the plastic deformation occurs, including a large number of polymer chains, the deformation of the surrounding air of extrusion is enough to make people's ears hear the sound.