Recent content by crazy lee

--------------------------------------------- My idea is to try to simplify the problem first. See if the simplified problem can be solved. Once the simplified problem can be solved, all conditions can be relaxed thank you very much.

------------------ I haven't read any ideal model related to my problem. I say this because someone studied a lot of ideal rigid balls directly as air before. I don't think so

I rely on translation software to communicate with you, because I really want to know the answer to the question

thank you.For example, I don't know if laws and formulas derived from the propagation of sound waves also hold true on this issue。

First of all, all the physical quantities presented in this topic are unknown variables, and I require a functional relationship between these unknown variables. In a vast space that does not consider gravity , there are many ideal rigid balls moving freely. And in equilibrium. The ball is...