I asked about two identical balloons unequally blown.?

Question

And man presenting himself as dr greg gave entirely wrong answer without any insight - although I explicitely asked for proof.
Other answers are incorrect too. Therefore, I must repeat the question - please find details in my previous question about two identical balloons. I am warning you that although the answer and the proof does not need any knowledge besides elementary physics, I was posting this question in the alt.physics group for years and nobody was able to answer it. So, if you consider it a challenge please think carefully and give the proof.

Answer 1

Good ? fernando,

I thought about this problem and remembered blowing up balloons long, long ago in my childhood. (It actually is easier to blow when the balloon gets larger).

Reason: the material stretches in the larger balloon and becomes thinner, so the elastic modulus is inversely proportional to size. Ergo, when the 2 are connected, air will flow from the smaller to the larger, since the smaller one has more pressure.

I realize this is not a formal proof, but it will have to do for now!

Answer 2

I even could disagree with Daniel C. In equilibrium state the pressures contained in the balloons will be equivalent and which means equivalent stretching of both balloons. This in turn will cause them to of equivalent length and structure if of same constitutions.