2. (USCS units) An extrusion operation produces continuous tubing; the die profile the dimensional profile shown below. The extruder barrel has a diameter = 4.0 in and length = 10 ft. The screw rotates at 50 rev/min; it has a channel depth = 0.25 in and flight angle = 16°. The head pressure has a value of 350 lb/in² and the viscosity of the polymer melt is 80 x 104 lb-sec/in². Under these conditions, what is the production rate in length of tube/min, assuming the extrudate is pulled at a rate that eliminates the effect of die swell (i.e., the tubing has the same OD and ID as the die profile)? 02.00 01.50