sorry for bothering with my question.
I have trying to understand, how is it possible to have a discontinuity on Density and not on Pressure. I don't understand, since we have a Pressure AND a Density discontinuity on t=0 , how can the equilibrium of the Pressure take place Immediate? I understand the Shock the rarefaction but the contact discontinuity bothers me a lot for some days and can't find anything related on Google.
Probably it's a stupid question, but still.. didn't know any other place to ask