An industrial pressure vessel is made of 1020 CD steel tubing with suitable end closures. This cylinder has a 50 in outer diameter, a 0.8 in wall thickness. Using the maximum-shear-stress theory, (a) determine the factor of safety if the pressure-release valve is set at 500 psi. (b) Determine the wall thickness if the factory of safety is 2. Compare (a) and (b) and explain your conclusion.

The magnitude of the amount of energy released by burning a fuel source, measured in energy per unit mass, is called its fuel value. note that the fuel value is the negative of the isobaric specific heat of combustion for the fuel. if all the energy obtained from burning 1.23 pounds of butane with a fuel value of 10.85 kcal/g is used to heat 128.0 kg of water at an initial temperature of 18.3 °c, what is the final temperature? note that 1 lb = 453.6 g.