Hi guys, just a simple question of how conventional thought deals with this scenario. <img src=http://www.ozziesnaps.com/vacram.gif> We have three rams. All are assembled in a space vacuum. For all intents and purposes all three rams have zero psi. figure A Now if we pump 2000psi into the outer two rams do we still have zero psi in the middle ram? [ the outer rams act against the inner ram attempting to decrease the pressure in that ram.] I am under the impression that the answer is that the inner ram still maintains a zero psi state yet that zero psi state is inhibiting the outer rams that are at 2000psi. Is the pressure in the inner ram [ fig B] "really" still only zero psi or something else? I was told a while ago that pressure can never be less than zero, is this valid? Has the vacuum in the inner ram achieved a state of a 2000psi potential? yet is maintaining a zero psi state? How does physics handle the forces in this situation? Thanks in advance..... Please Register or Log in to view the hidden image!