A parison is extruded from a die with outside diameter = 113 mm and inside diameter = 7.5 mm. The observed die swell is 1.25. The parison is used to blow mold a beverage container whose outside diameter -- 112 mm (a standard-size, 2-liter soda bottle).
(a) What is the corresponding wall thickness of the container?
(b) Obtain an empty, 2-liter plastic soda bottle and (carefully) cut it across the diameter. Using a micrometer, measure the wall thickness to compare with your answer in (a).