Anybody help with these questions??? 1. The problem statement, all variables and given/known data A spherical pressure vessel has been designed such that the tensile stresses in its walls should not exceed 150MPa. The ratio of the vessels radius to wall thickness is 100. Applying a thin-walled plane stress assumption, what is the maximum uniform internal pressure that the vessel is intended to contain??? 2. Relevant equations Thin walled pressure cylinder assumption P= sigma(s) x radius/2xt(s) 3. The attempt at a solution i tried the answer 0.15MPa but not sure if its right can anyone help me??