1.A spherical pressurevessel of 1.2m outside diameter is to be fabricated from a steelhaving an ultimate stress of σU450 MPa. Knowing that a factor of safetyof 4.0 is desired and that the gage pressure may reach 3 MPa,determine the smallest wall thickness which may be used.
2.Determine the normal stress in a basketball of 12 inches diameter and 0.1 inch wall thickness which has been inflated to a gage pressure of 15psi.