1.A large spherical tank contains a gas at a pressure 420 psi.The tank is 45 ft in diameter. if the maximum stress that the tank can sustain equals 22.857 Ksi,determine the required thickness (to the nearest 1/4). if the tank wall thickness is specified to be 2.25 inches,what is the maximum internal pressure?
2.A cylindrical pressure vessel can support an internal pressure of 2640 psi. The maximum hoop stress is (65000/2) psi and the maximum shear stress is 16000 psi. If the diameter of the tank is 7 inches,what is the minimum wall thickness. If the wall thickness is 0.25 in,what is the maximum internal pressure?