a navel gun (E= 30,000 ksi and G = 11,600 ksi) with a bore of 16 in. develops a maximum internal pressure of 20,000 psi. Determine
a. the minimum outside diameter required if the maximum tensile stress permitted in the gun barrel is 36,000 psi.
b. the change inside diameter when the gun is fired if the outside diameter of part a is used.